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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 1    February 2006

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Additional transition induced by magnetoelectric interaction in
ferroelectromagnet Pb(Fe1/2Nb1/2)O3
YANG Ying(杨 颖)1, HUANG Hong-bo(黄红波)2, SHEN Hong-lie(沈鸿烈)1,
LIU Jun-ming(刘俊明)2, LIU Zhi-guo(刘治国)2

1. College of Materials Science and Technology, Nanjing University of Aeronautics
and Astronautics, Nanjing 210016, China;
2. Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China

Abstract:Besides the two phase transitions known in ferroelectromagnets, an additional transition was observed experimentally in Pb(Fe1/2Nb1/2)O3 and the possible mechanism was explored. The magnetic moment shows that anomalous increases when the temperature goes down away from the Néel temperature of 20-30 K. The existence of the hysteresis verifies the weak ferromagnetic property. This additional phase transition is considered to originate from the magnetoelectric coupling between the ferroelectric and antiferromagnetic orders in this compound. From the Mössbauer parameter analysis, it is confirmed that the hybridization of the O 2p, Fe 3d and Nb 4d electron states makes the realization of magnetoelectric coupling possible.

 

Key words: Pb(Fe1/2Nb1/2)O3; ferroelectromagnet; magnetoelectric coupling; magnetoelectric interaction; orbital hybridization

ISSN 1672-7029
CN 43-1423/U

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