Effect of Gd substitution on the structure and magnetic properties of YFeO3 ceramics

被引：80
作者：
Yuan, Xueping [1 ]
Sun, Yue [1 ]
Xu, Mingxiang [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2012年 / 196卷
基金：
美国国家科学基金会;
关键词：
Solid state reaction; Magnetic; Perovskite; RARE-EARTH; SUPEREXCHANGE INTERACTION; SPIN REORIENTATION; ORTHOFERRITES; MOSSBAUER; PEROVSKITE;
D O I：
10.1016/j.jssc.2012.06.042
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
High quality Gd-doped YFeO3 polycrystalline samples were synthesized by solid-state reaction method. The crystal structure of the samples can be described by the space group of Pbnm (No. 62). Fe-57 Mossbauer spectra show that only the high spin Fe3+ exists and the samples are magnetic ordering at room temperature. The spontaneous magnetization at room temperature was observed and the paramagnetic contribution from Gd3+ ions was confirmed by the significant enhancement of the magnetization. Temperature-dependent magnetization data correlate with the Gd concentration x and follow the Curie-Weiss law above the ferromagnetic transition temperature. Magnetic measurements suggest that the substitution of Y3+ ions by Gd3+ ions effectively enhance the magnetization of YFeO3. This is achieved by the additional Gd-Gd interactions, Gd-Fe interactions and the variation of Fe-O-Fe superexchange bond caused by distortion of the crystal structure. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：362 / 366
页数：5
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