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Zhang L, Dönni A, Pomjakushin VY, Yamaura K, Belik AA. Crystal and Magnetic Structures and Properties of (Lu 1- xMn x)MnO 3 Solid Solutions. Inorg Chem 2018; 57:14073-14085. [PMID: 30403481 DOI: 10.1021/acs.inorgchem.8b01470] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(Lu1- xMn x)MnO3 solid solutions, having the perovskite-type structure and Pnma space group, with 0 ≤ x ≤ 0.4 were synthesized by a high-pressure, high-temperature method at 6 GPa and about 1670 K from Lu2O3 and Mn2O3. Their crystal and magnetic structures were studied by neutron powder diffraction. The degree of octahedral MnO6 tilting decreases in (Lu1- xMn x)MnO3 with increasing x. Only the incommensurate (IC) spin structure with a propagation vector of k = ( k0, 0, 0) and k0 ≈ 0.44 remains in (Lu0.9Mn0.1)MnO3 in the whole temperature range below the Neel temperature TN = 36 K, and the commensurate noncollinear E-type structure that has been reported in the literature for undoped o-LuMnO3 is not observed. (Lu1- xMn x)MnO3 samples with 0.2 ≤ x ≤ 0.4 have a ferrimagnetic structure with a propagation vector of k = (0, 0, 0) and ferromagnetic (FM) ordering of Mn3+ and Mn4+ cations at the B site, which are antiferromagnetically coupled to a noncollinear predominantly FM arrangement of Mn2+ at the A site. The ferrimagnetic Curie temperature, TC, increases monotonically from 67 K for x = 0.2 to 118 K for x = 0.4. Magnetic and dielectric properties of (Lu1- xMn x)MnO3 and a composition-temperature phase diagram are also reported.
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Affiliation(s)
- Lei Zhang
- Research Center for Functional Materials , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan.,Graduate School of Chemical Sciences and Engineering , Hokkaido University , North 10 West 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | - Andreas Dönni
- International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan
| | - Vladimir Y Pomjakushin
- Laboratory for Neutron Scattering and Imaging , Paul Scherrer Institute , 5232 Villigen PSI , Switzerland
| | - Kazunari Yamaura
- Research Center for Functional Materials , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan.,Graduate School of Chemical Sciences and Engineering , Hokkaido University , North 10 West 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | - Alexei A Belik
- Research Center for Functional Materials , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan
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Zhang L, Gerlach D, Dönni A, Chikyow T, Katsuya Y, Tanaka M, Ueda S, Yamaura K, Belik AA. Mn Self-Doping of Orthorhombic RMnO 3 Perovskites: (R 0.667Mn 0.333)MnO 3 with R = Er-Lu. Inorg Chem 2018; 57:2773-2781. [PMID: 29431431 DOI: 10.1021/acs.inorgchem.7b03188] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Orthorhombic rare-earth trivalent manganites RMnO3 (R = Er-Lu) were self-doped with Mn to form (R0.667Mn0.333)MnO3 compositions, which were synthesized by a high-pressure, high-temperature method at 6 GPa and about 1670 K from R2O3 and Mn2O3. The average oxidation state of Mn is 3+ in (R0.667Mn0.333)MnO3. However, Mn enters the A site in the oxidation state of 2+, creating the average oxidation state of 3.333+ at the B site. The presence of Mn2+ was confirmed by hard X-ray photoelectron spectroscopy measurements. Crystal structures were studied by synchrotron powder X-ray diffraction. (R0.667Mn0.333)MnO3 crystallizes in space group Pnma with a = 5.50348(2) Å, b = 7.37564(1) Å, and c = 5.18686(1) Å for (Lu0.667Mn0.333)MnO3 at 293 K, and they are isostructural with the parent RMnO3 manganites. Compared with RMnO3, (R0.667Mn0.333)MnO3 exhibits enhanced Néel temperatures of about TN1 = 106-110 K and ferrimagnetic or canted antiferromagnetic properties. Compounds with R = Er and Tm show additional magnetic transitions at about TN2 = 9-16 K. (Tm0.667Mn0.333)MnO3 exhibits a magnetization reversal or negative magnetization effect with a compensation temperature of about 16 K.
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Affiliation(s)
- Lei Zhang
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , North 10 West 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | | | | | | | - Yoshio Katsuya
- Synchrotron X-ray Station at SPring-8 , National Institute for Materials Science , Kouto 1-1-1 , Sayo-cho , Hyogo 679-5148 , Japan
| | - Masahiko Tanaka
- Synchrotron X-ray Station at SPring-8 , National Institute for Materials Science , Kouto 1-1-1 , Sayo-cho , Hyogo 679-5148 , Japan
| | - Shigenori Ueda
- Synchrotron X-ray Station at SPring-8 , National Institute for Materials Science , Kouto 1-1-1 , Sayo-cho , Hyogo 679-5148 , Japan.,Research Center for Advanced Measurement and Characterization , National Institute for Materials Science , Sengen 1-2-1 , Tsukuba , Ibaraki 305-0047 , Japan
| | - Kazunari Yamaura
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , North 10 West 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
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Deng J, Farid MA, Zhang M, Yang A, Zhang H, Zhang H, Tian G, Wu M, Liu L, Sun J, Li G, Liao F, Lin J. Enhancement of Ferroelectricity for Orthorhombic (Tb 0.861Mn 0.121)MnO 3-δ by Copper Doping. Inorg Chem 2017; 56:3475-3482. [PMID: 28240880 DOI: 10.1021/acs.inorgchem.6b03024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Copper-doped (Tb0.861Mn0.121)MnO3-δ has been synthesized by the conventional solid state reaction method. X-ray, neutron, and electron diffraction data indicate that they crystallize in Pnma space group at room temperature. Two magnetic orderings are found for this series by neutron diffraction. One is the ICAM (incommensurate canted antiferromagnetic) ordering of Mn with a wave vector qMn = (∼0.283, 0, 0) with a ≈ 5.73 Å, b ≈ 5.31 Å, and c ≈ 7.41 Å, and the other is the CAM (canted antiferromagnetic) ordering of both Tb and Mn in the magnetic space group Pn'a21' with a ≈ 5.73 Å, b ≈ 5.31 Å, and c ≈ 7.41 Å. A dielectric peak around 40 K is found for the samples doped with Cu, which is higher than that for orthorhombic TbMnO3.
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Affiliation(s)
- Jianming Deng
- College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa
| | - Muhammad Asim Farid
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Meng Zhang
- Department of Chemistry, School of Science, Beijing Jiaotong University , Beijing 100044, People's Republic of China
| | - Aimei Yang
- College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa
| | - Hongxing Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Hao Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Gengfang Tian
- Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy , Beijing 102413, People's Republic of China
| | - Meimei Wu
- Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy , Beijing 102413, People's Republic of China
| | - Laijun Liu
- College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa
| | - Junliang Sun
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Guobao Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Fuhui Liao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Jianhua Lin
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
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Deng J, Yang A, Farid MA, Zhang H, Li J, Zhang H, Li G, Liu L, Sun J, Lin J. Synthesis, structure and magnetic properties of (Eu1−xMnx)MnO3−δ. RSC Adv 2017. [DOI: 10.1039/c6ra25951k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The solid solution (Eu1−xMnx)MnO3−δ (0 ≤ x ≤ 0.126) has been synthesized using a conventional solid-state method.
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