掺钆BiFeO3多铁材料的磁电耦合和晶格动力学

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464737

V. Tryhuk, A. Ravinski, I. Makoed, V. Lazenka, K. Januszkiewicz

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引用次数: 0

摘要

采用固相反应法制备了Bi1−xGdxFeO3 (x = 0−0.2)陶瓷。进行了磁性和磁电性质的研究。由于R3c→Pnma结构的变化，随着Gd含量的增加，螺旋调制自旋结构不断坍塌，在x > 0.1时，磁化强度和磁电系数显著增强。利用密度泛函理论对纯BiFeO3的晶格动力学进行了从头算研究，以阐明其铁电不稳定性。

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Magnetoelectric coupling and lattice dynamics of Gd-doped BiFeO3 multiferroics

The Bi1−xGdxFeO3 (x = 0 − 0.2) ceramics were prepared by a solid-state reaction technique. Studies of magnetic and magnetoelectric properties were carried out. Due to the R3c → Pnma structural change, the spiral modulated spin structure collapses continuously with increasing Gd content and strongly enhances magnetization and magnetoelectric coefficient at x > 0.1. Studies of lattice dynamics of pure BiFeO3 were conducted ab-initio by means of density functional theory in order to shed light on ferroelectric instability.

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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