Study of weak ferromagnetism in polycrystalline multiferroic Eu doped bismuth ferrite

被引：93
|
作者：
Reddy, V. Raghavendra [1 ]
Kothari, Deepti [1 ]
Gupta, Ajay [1 ]
Gupta, S. M. [2 ]
机构：
[1] UGC DAE Consortium Sci Res, Indore 452017, Madhya Pradesh, India
[2] Raja Ramanna Ctr Adv Technol, Ceram Lab, Laser Mat Dev & Devices Div, Indore 452013, Madhya Pradesh, India
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 08期
关键词：
bismuth compounds; europium; ferromagnetic materials; magnetisation; Mossbauer effect; multiferroics; Neel temperature; solid-state phase transformations; ROOM-TEMPERATURE; MOSSBAUER-SPECTROSCOPY; SINGLE-PHASE; BIFEO3; FERROELECTRICITY; OXIDES;
D O I：
10.1063/1.3089577
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Room temperature spontaneous magnetization and dielectric anomaly at Neel temperature are observed in 15% Eu doped bismuth ferrite indicating the multiferroic nature of the sample. With 15% Eu doping structural transformation from rhombohedral to triclinic is observed. Fe(3+) and Eu(3+) oxidation states are observed from (57)Fe and (151)Eu Mossbauer measurements, respectively. The high field (57)Fe Mossbauer spectrum in longitudinal geometry shows an enhancement in the intensity of lines corresponding to Delta m=0 transitions, i.e., second and fifth lines in six line pattern. This observation suggests that the origin of spontaneous magnetization is due to weak ferromagnetism of Dzyaloshinskii-Moriya type.
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页数：3
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