Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3
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Published:2021-03-26
Issue:1
Volume:12
Page:
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ISSN:2041-1723
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Container-title:Nature Communications
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language:en
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Short-container-title:Nat Commun
Author:
Ye XubinORCID, Zhao Jianfa, Das HenaORCID, Sheptyakov DenisORCID, Yang Junye, Sakai Yuki, Hojo HajimeORCID, Liu Zhehong, Zhou Long, Cao Lipeng, Nishikubo TakumiORCID, Wakazaki Shogo, Dong Cheng, Wang Xiao, Hu ZhiweiORCID, Lin Hong-Ji, Chen Chien-Te, Sahle ChristophORCID, Efiminko Anna, Cao HuiboORCID, Calder StuartORCID, Mibu KoORCID, Kenzelmann MichelORCID, Tjeng Liu HaoORCID, Yu RunzeORCID, Azuma MasakiORCID, Jin ChangqingORCID, Long YouwenORCID
Abstract
AbstractPbMO3 (M = 3d transition metals) family shows systematic variations in charge distribution and intriguing physical properties due to its delicate energy balance between Pb 6s and transition metal 3d orbitals. However, the detailed structure and physical properties of PbFeO3 remain unclear. Herein, we reveal that PbFeO3 crystallizes into an unusual 2ap × 6ap × 2ap orthorhombic perovskite super unit cell with space group Cmcm. The distinctive crystal construction and valence distribution of Pb2+0.5Pb4+0.5FeO3 lead to a long range charge ordering of the -A-B-B- type of the layers with two different oxidation states of Pb (Pb2+ and Pb4+) in them. A weak ferromagnetic transition with canted antiferromagnetic spins along the a-axis is found to occur at 600 K. In addition, decreasing the temperature causes a spin reorientation transition towards a collinear antiferromagnetic structure with spin moments along the b-axis near 418 K. Our theoretical investigations reveal that the peculiar charge ordering of Pb generates two Fe3+ magnetic sublattices with competing anisotropic energies, giving rise to the spin reorientation at such a high critical temperature.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
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