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Ovsyannikov SV, Karkin AE, Korobeinikov IV, Morozova NV, Bykov M, Bykova E, Dubrovinsky L. Electronic properties of single-crystalline Fe 4O 5. Dalton Trans 2023; 52:5563-5574. [PMID: 37013382 DOI: 10.1039/d3dt00381g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
We synthesized single and polycrystals of iron oxide with an unconventional Fe4O5 stoichiometry under high-pressure high-temperature (HP-HT) conditions. The crystals of Fe4O5 had a CaFe3O5-type structure composed of linear chains of iron with octahedral and trigonal-prismatic oxygen coordinations. We investigated the electronic properties of this mixed-valence oxide using several experimental techniques, including measurements of electrical resistivity, the Hall effect, magnetoresistance, and thermoelectric power (Seebeck coefficient), X-ray absorption near edge spectroscopy (XANES), reflectance and absorption spectroscopy, and single-crystal X-ray diffraction. Under ambient conditions, the single crystals of Fe4O5 demonstrated a semimetal electrical conductivity with nearly equal partial contributions of electrons and holes (σn ≈ σp), in line with the nominal average oxidation state of iron as Fe2.5+. This finding suggests that both the octahedral and trigonal-prismatic iron cations contribute to the electrical conductivity of Fe4O5via an Fe2+/Fe3+ polaron hopping mechanism. A moderate deterioration of crystal quality shifted the dominant electrical conductivity to n-type and considerably worsened the conductivity. Thus, alike magnetite, Fe4O5 with equal numbers of Fe2+ and Fe3+ ions can serve as a prospective model for other mixed-valence transition-metal oxides. In particular, it could help in the understanding of the electronic properties of other recently discovered mixed-valence iron oxides with unconventional stoichiometries, many of which are not recoverable to ambient conditions; it can also help in designing novel more complex mixed-valence iron oxides.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany.
| | - Alexander E Karkin
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., Yekaterinburg 620137, Russia
| | - Igor V Korobeinikov
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., Yekaterinburg 620137, Russia
| | - Natalia V Morozova
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., Yekaterinburg 620137, Russia
| | - Maxim Bykov
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Elena Bykova
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany.
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany.
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Ovsyannikov SV, Bykov M, Medvedev SA, Naumov PG, Jesche A, Tsirlin AA, Bykova E, Chuvashova I, Karkin AE, Dyadkin V, Chernyshov D, Dubrovinsky LS. Innentitelbild: A Room‐Temperature Verwey‐type Transition in Iron Oxide, Fe
5
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(Angew. Chem. 14/2020). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sergey V. Ovsyannikov
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences 91 Pervomayskaya Str. 620990 Yekaterinburg Russia
| | - Maxim Bykov
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Geophysical Laboratory, Carnegie Institution of Washington 5251 Broad Branch Rd. NW 20015 Washington, DC USA
| | - Sergey A. Medvedev
- Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany
| | - Pavel G. Naumov
- Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany
- FSRC “Crystallography and Photonics” RAS Leninskiy Prospekt 59 Moscow 119333 Russia
| | - Anton Jesche
- Experimental Physics VI Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86135 Augsburg Germany
| | - Alexander A. Tsirlin
- Experimental Physics VI Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86135 Augsburg Germany
| | - Elena Bykova
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Deutsches Elektronen-Synchrotron (DESY) 22603 Hamburg Germany
| | - Irina Chuvashova
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
| | - Alexander E. Karkin
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences 18 S. Kovalevskaya Str. Yekaterinburg 620137 Russia
| | - Vadim Dyadkin
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility 38000 Grenoble France
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility 38000 Grenoble France
| | - Leonid S. Dubrovinsky
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
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Ovsyannikov SV, Bykov M, Medvedev SA, Naumov PG, Jesche A, Tsirlin AA, Bykova E, Chuvashova I, Karkin AE, Dyadkin V, Chernyshov D, Dubrovinsky LS. Inside Cover: A Room‐Temperature Verwey‐type Transition in Iron Oxide, Fe
5
O
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(Angew. Chem. Int. Ed. 14/2020). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/anie.202001375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sergey V. Ovsyannikov
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences 91 Pervomayskaya Str. 620990 Yekaterinburg Russia
| | - Maxim Bykov
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Geophysical Laboratory, Carnegie Institution of Washington 5251 Broad Branch Rd. NW 20015 Washington, DC USA
| | - Sergey A. Medvedev
- Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany
| | - Pavel G. Naumov
- Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany
- FSRC “Crystallography and Photonics” RAS Leninskiy Prospekt 59 Moscow 119333 Russia
| | - Anton Jesche
- Experimental Physics VI Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86135 Augsburg Germany
| | - Alexander A. Tsirlin
- Experimental Physics VI Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86135 Augsburg Germany
| | - Elena Bykova
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Deutsches Elektronen-Synchrotron (DESY) 22603 Hamburg Germany
| | - Irina Chuvashova
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
| | - Alexander E. Karkin
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences 18 S. Kovalevskaya Str. Yekaterinburg 620137 Russia
| | - Vadim Dyadkin
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility 38000 Grenoble France
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility 38000 Grenoble France
| | - Leonid S. Dubrovinsky
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
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Ovsyannikov SV, Bykov M, Medvedev SA, Naumov PG, Jesche A, Tsirlin AA, Bykova E, Chuvashova I, Karkin AE, Dyadkin V, Chernyshov D, Dubrovinsky LS. A Room-Temperature Verwey-type Transition in Iron Oxide, Fe 5 O 6. Angew Chem Int Ed Engl 2020; 59:5632-5636. [PMID: 31899577 PMCID: PMC7154779 DOI: 10.1002/anie.201914988] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 12/30/2019] [Indexed: 12/02/2022]
Abstract
Functional oxides whose physicochemical properties may be reversibly changed at standard conditions are potential candidates for the use in next‐generation nanoelectronic devices. To date, vanadium dioxide (VO2) is the only known simple transition‐metal oxide that demonstrates a near‐room‐temperature metal–insulator transition that may be used in such appliances. In this work, we synthesized and investigated the crystals of a novel mixed‐valent iron oxide with an unconventional Fe5O6 stoichiometry. Near 275 K, Fe5O6 undergoes a Verwey‐type charge‐ordering transition that is concurrent with a dimerization in the iron chains and a following formation of new Fe−Fe chemical bonds. This unique feature highlights Fe5O6 as a promising candidate for the use in innovative applications. We established that the minimal Fe−Fe distance in the octahedral chains is a key parameter that determines the type and temperature of charge ordering. This model provides new insights into charge‐ordering phenomena in transition‐metal oxides in general.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany.,Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences, 91 Pervomayskaya Str., 620990, Yekaterinburg, Russia
| | - Maxim Bykov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany.,Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Rd. NW, 20015, Washington, DC, USA
| | - Sergey A Medvedev
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
| | - Pavel G Naumov
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany.,FSRC "Crystallography and Photonics" RAS, Leninskiy Prospekt 59, Moscow, 119333, Russia
| | - Anton Jesche
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135, Augsburg, Germany
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135, Augsburg, Germany
| | - Elena Bykova
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany.,Deutsches Elektronen-Synchrotron (DESY), 22603, Hamburg, Germany
| | - Irina Chuvashova
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany
| | - Alexander E Karkin
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., Yekaterinburg, 620137, Russia
| | - Vadim Dyadkin
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000, Grenoble, France
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000, Grenoble, France
| | - Leonid S Dubrovinsky
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany
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Ovsyannikov SV, Bykov M, Medvedev SA, Naumov PG, Jesche A, Tsirlin AA, Bykova E, Chuvashova I, Karkin AE, Dyadkin V, Chernyshov D, Dubrovinsky LS. A Room‐Temperature Verwey‐type Transition in Iron Oxide, Fe
5
O
6. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sergey V. Ovsyannikov
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences 91 Pervomayskaya Str. 620990 Yekaterinburg Russia
| | - Maxim Bykov
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Geophysical Laboratory, Carnegie Institution of Washington 5251 Broad Branch Rd. NW 20015 Washington, DC USA
| | - Sergey A. Medvedev
- Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany
| | - Pavel G. Naumov
- Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany
- FSRC “Crystallography and Photonics” RAS Leninskiy Prospekt 59 Moscow 119333 Russia
| | - Anton Jesche
- Experimental Physics VI Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86135 Augsburg Germany
| | - Alexander A. Tsirlin
- Experimental Physics VI Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86135 Augsburg Germany
| | - Elena Bykova
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
- Deutsches Elektronen-Synchrotron (DESY) 22603 Hamburg Germany
| | - Irina Chuvashova
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
| | - Alexander E. Karkin
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences 18 S. Kovalevskaya Str. Yekaterinburg 620137 Russia
| | - Vadim Dyadkin
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility 38000 Grenoble France
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility 38000 Grenoble France
| | - Leonid S. Dubrovinsky
- Bayerisches Geoinstitut Universität Bayreuth Universitätsstrasse 30 95447 Bayreuth Germany
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Ovsyannikov SV, Bykov M, Bykova E, Kozlenko DP, Tsirlin AA, Karkin AE, Shchennikov VV, Kichanov SE, Gou H, Abakumov AM, Egoavil R, Verbeeck J, McCammon C, Dyadkin V, Chernyshov D, van Smaalen S, Dubrovinsky LS. Charge-ordering transition in iron oxide Fe4O5 involving competing dimer and trimer formation. Nat Chem 2016; 8:501-8. [PMID: 27102685 DOI: 10.1038/nchem.2478] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 02/15/2016] [Indexed: 11/09/2022]
Abstract
Phase transitions that occur in materials, driven, for instance, by changes in temperature or pressure, can dramatically change the materials' properties. Discovering new types of transitions and understanding their mechanisms is important not only from a fundamental perspective, but also for practical applications. Here we investigate a recently discovered Fe4O5 that adopts an orthorhombic CaFe3O5-type crystal structure that features linear chains of Fe ions. On cooling below ∼150 K, Fe4O5 undergoes an unusual charge-ordering transition that involves competing dimeric and trimeric ordering within the chains of Fe ions. This transition is concurrent with a significant increase in electrical resistivity. Magnetic-susceptibility measurements and neutron diffraction establish the formation of a collinear antiferromagnetic order above room temperature and a spin canting at 85 K that gives rise to spontaneous magnetization. We discuss possible mechanisms of this transition and compare it with the trimeronic charge ordering observed in magnetite below the Verwey transition temperature.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
| | - Maxim Bykov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany.,Laboratory of Crystallography, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
| | - Elena Bykova
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany.,Laboratory of Crystallography, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
| | | | - Alexander A Tsirlin
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.,Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
| | - Alexander E Karkin
- Institute of Metal Physics, Russian Academy of Sciences, Urals Division, GSP-170, 18 S. Kovalevskaya Str., Yekaterinburg 620041, Russia
| | - Vladimir V Shchennikov
- Institute of Metal Physics, Russian Academy of Sciences, Urals Division, GSP-170, 18 S. Kovalevskaya Str., Yekaterinburg 620041, Russia.,Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | | | - Huiyang Gou
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany.,Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Artem M Abakumov
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.,Department of Chemistry, Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Ricardo Egoavil
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Johan Verbeeck
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Catherine McCammon
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
| | - Vadim Dyadkin
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000, Grenoble, France
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000, Grenoble, France
| | - Sander van Smaalen
- Laboratory of Crystallography, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
| | - Leonid S Dubrovinsky
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
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Ovsyannikov SV, Karkin AE, Morozova NV, Shchennikov VV, Bykova E, Abakumov AM, Tsirlin AA, Glazyrin KV, Dubrovinsky L. A hard oxide semiconductor with a direct and narrow bandgap and switchable p-n electrical conduction. Adv Mater 2014; 26:8185-8191. [PMID: 25348375 DOI: 10.1002/adma.201403304] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/17/2014] [Indexed: 06/04/2023]
Abstract
An oxide semiconductor (perovskite-type Mn2 O3 ) is reported which has a narrow and direct bandgap of 0.45 eV and a high Vickers hardness of 15 GPa. All the known materials with similar electronic band structures (e.g., InSb, PbTe, PbSe, PbS, and InAs) play crucial roles in the semiconductor industry. The perovskite-type Mn2 O3 described is much stronger than the above semiconductors and may find useful applications in different semiconductor devices, e.g., in IR detectors.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447, Bayreuth, Germany
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Karkin AE, Wolf T, Goshchitskii BN. Superconducting properties of (Ba-K)Fe2As2 single crystals disordered with fast neutron irradiation. J Phys Condens Matter 2014; 26:275702. [PMID: 24934932 DOI: 10.1088/0953-8984/26/27/275702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Resistivity ρ(T), Hall coefficient RH(T), superconducting transition temperature Tc and slopes of the upper critical field dHc2/dT were studied in (Ba1-xKx)Fe2As2 (x = 0.218, 0.356, 0.531) single crystals irradiated with fast neutrons. It is found that dTc/dρSC-the rate of decreasing Tc as a function of the ρSC (ρSC is the resistivity at T = Tc)-linearly increases with concentration x. Slow changes in the Hall coefficient RH, as well as the quadratic electronic contribution to the resistivity, show that there are no substantial changes in the topology of the Fermi surface caused by irradiation. The slopes of the upper critical field dHc2/dT in ab and c directions as a function of ρSC determined by Hall measurements show a reasonable agreement with a model that suggests constancy of the band parameters.
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Affiliation(s)
- A E Karkin
- Institute of Metal Physics UB RAS, 620219 Ekaterinburg, Russia
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9
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Ovsyannikov SV, Zainulin YG, Kadyrova NI, Tyutyunnik AP, Semenova AS, Kasinathan D, Tsirlin AA, Miyajima N, Karkin AE. New Antiferromagnetic Perovskite CaCo3V4O12 Prepared at High-Pressure and High-Temperature Conditions. Inorg Chem 2013; 52:11703-10. [PMID: 24083336 DOI: 10.1021/ic400649h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sergey V. Ovsyannikov
- Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Strasse, Yekaterinburg 620990, Russia
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse
30, Bayreuth D-95447, Germany
| | - Yury G. Zainulin
- Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Strasse, Yekaterinburg 620990, Russia
| | - Nadezda I. Kadyrova
- Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Strasse, Yekaterinburg 620990, Russia
| | - Alexander P. Tyutyunnik
- Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Strasse, Yekaterinburg 620990, Russia
| | - Anna S. Semenova
- Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Strasse, Yekaterinburg 620990, Russia
| | - Deepa Kasinathan
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - Alexander A. Tsirlin
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - Nobuyoshi Miyajima
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse
30, Bayreuth D-95447, Germany
| | - Alexander E. Karkin
- Institute of Metal Physics, Russian Academy of Sciences, Urals Division, GSP-170, 18 S. Kovalevskaya Strasse, Yekaterinburg 620990, Russia
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10
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Ovsyannikov SV, Wu X, Shchennikov VV, Karkin AE, Dubrovinskaia N, Garbarino G, Dubrovinsky L. Structural stability of a golden semiconducting orthorhombic polymorph of Ti2O3 under high pressures and high temperatures. J Phys Condens Matter 2010; 22:375402. [PMID: 21403194 DOI: 10.1088/0953-8984/22/37/375402] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An orthorhombic polymorph of titanium oxide (Ti(2)O(3)) has been synthesized at high pressure-high temperature (HP-HT) conditions. It has been refined in the Pnma space group and the Th(2)S(3) structural type with the unit cell parameters as follows: a = 7.8248(6) Å, b = 2.8507(4) Å, c = 8.0967(3) Å, V = 180.61(1) Å(3) and Z = 4. The samples of Pnma-Ti(2)O(3) were of a golden colour, in contrast to the conventional black corundum-structured Ti(2)O(3). The structural stability of this polymorph has been examined by simultaneous Raman and x-ray diffraction studies under high pressure over 70 GPa and high temperature over 2200 K. No phase transformations or chemical reactions have been established. The electrical resistivity of Th(2)S(3)-structured Ti(2)O(3) samples showed a semiconducting behaviour and, at ambient conditions, was equal to 0.20-0.46 Ω cm. Conventional near-infrared absorption spectroscopy established the absence of energy gaps above 0.25 eV.
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11
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Szymczak R, Karkin AE, Baran M, Szymczak H. Reversible magnetization of radiation-disordered YBa2Cu3O7-x single crystals. Phys Rev B Condens Matter 1994; 50:9463-9469. [PMID: 9974999 DOI: 10.1103/physrevb.50.9463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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