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Ovsyannikov SV, Bykova E, Pakhomova A, Kozlenko DP, Bykov M, Kichanov SE, Morozova NV, Korobeinikov IV, Wilhelm F, Rogalev A, Tsirlin AA, Kurnosov AV, Zainulin YG, Kadyrova NI, Tyutyunnik AP, Dubrovinsky L. Structural and Magnetic Transitions in CaCo 3V 4O 12 Perovskite at Extreme Conditions. Inorg Chem 2017; 56:6251-6263. [PMID: 28520414 DOI: 10.1021/acs.inorgchem.7b00330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigated the structural, vibrational, magnetic, and electronic properties of the recently synthesized CaCo3V4O12 double perovskite with the high-spin (HS) Co2+ ions in a square-planar oxygen coordination at extreme conditions of high pressures and low temperatures. The single-crystal X-ray diffraction and Raman spectroscopy studies up to 60 GPa showed a conservation of its cubic crystal structure but indicated a crossover near 30 GPa. Above 30 GPa, we observed both an abnormally high "compressibility" of the Co-O bonds in the square-planar oxygen coordination and a huge anisotropic displacement of HS-Co2+ ions in the direction perpendicular to the oxygen planes. Although this effect is reminiscent of a continuous HS → LS transformation of the Co2+ ions, it did not result in the anticipated shrinkage of the cell volume because of a certain "stiffing" of the bonds of the Ca and V cations. We verified that the oxidation states of all the cations did not change across this crossover, and hence, no charge-transfer effects were involved. Consequently, we proposed that CaCo3V4O12 could undergo a phase transition at which the large HS-Co2+ ions were pushed out of the oxygen planes because of lattice compression. The antiferromagnetic transition in CaCo3V4O12 at 100 K was investigated by neutron powder diffraction at ambient pressure. We established that the magnetic moments of the Co2+ ions were aligned along one of the cubic axes, and the magnetic structure had a 2-fold periodicity along this axis, compared to the crystallographic one.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany.,Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Elena Bykova
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany.,Deutsches Elektronen-Synchrotron (DESY) , D-22603 Hamburg, Germany
| | - Anna Pakhomova
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany.,Deutsches Elektronen-Synchrotron (DESY) , D-22603 Hamburg, Germany
| | - Denis P Kozlenko
- Frank Laboratory of Neutron Physics, JINR , 141980 Dubna, Russia
| | - Maxim Bykov
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany
| | | | - Natalia V Morozova
- Institute of Metal Physics of Russian Academy of Sciences , Urals Division, GSP-170, 18 S. Kovalevskaya Str., Yekaterinburg 620990, Russia
| | - Igor V Korobeinikov
- Institute of Metal Physics of Russian Academy of Sciences , Urals Division, GSP-170, 18 S. Kovalevskaya Str., Yekaterinburg 620990, Russia
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility , 71, avenue des Martyrs CS 40220, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility , 71, avenue des Martyrs CS 40220, 38043 Grenoble Cedex 9, France
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg , 86135 Augsburg, Germany
| | - Alexander V Kurnosov
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany
| | - Yury G Zainulin
- Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Nadezda I Kadyrova
- Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Alexander P Tyutyunnik
- Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany
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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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