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Ye, Xubin; Zhao, Jianfa; Das, Hena; Sheptyakov, Denis; Yang, Junye; Sakai, Yuki; Hojo, Hajime; Liu, Zhehong; Zhou, Long; Cao, Lipeng; Nishikubo, Takumi; Wakazaki, Shogo; Dong, Cheng; Wang, Xiao; Hu, Zhiwei; Lin, Hong-Ji; Chen, Chien-Te; Sahle, Christoph; Efiminko, Anna; Cao, Huibo; Calder, Stuart; Mibu, Ko; Kenzelmann, Michel; Tjeng, Liu Hao; Yu, Runze; Azuma, Masaki; Jin, Changqing; Long, Youwen
Nature communications, 03/2021, Letnik: 12, Številka: 1Journal Article
Abstract Pb M O 3 ( M = 3 d transition metals) family shows systematic variations in charge distribution and intriguing physical properties due to its delicate energy balance between Pb 6 s and transition metal 3 d orbitals. However, the detailed structure and physical properties of PbFeO 3 remain unclear. Herein, we reveal that PbFeO 3 crystallizes into an unusual 2 a p × 6 a p × 2 a p orthorhombic perovskite super unit cell with space group Cmcm . The distinctive crystal construction and valence distribution of Pb 2+ 0.5 Pb 4+ 0.5 FeO 3 lead to a long range charge ordering of the -A-B-B- type of the layers with two different oxidation states of Pb (Pb 2+ and Pb 4+ ) 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 Fe 3+ magnetic sublattices with competing anisotropic energies, giving rise to the spin reorientation at such a high critical temperature.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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