期刊
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
卷 24, 期 1-2, 页码 635-639出版社
SPRINGER
DOI: 10.1007/s10948-010-0959-6
关键词
Mossbauer spectroscopy; Multiferroic; Perovskite; BiFeO3
资金
- Korea government (MEST) [2010-0000851, 2009-0083645]
The crystallographic and magnetic properties of europium-doped Bi1-x Eu (x) FeO3 prepared by a sol-gel method have been studied by X-ray diffraction, superconducting quantum interference device (SQUID) magnetometer, vibrating sample magnetometer (VSM) and Mossbauer spectroscopy. The X-ray diffraction pattern for Bi0.9Eu0.1FeO3 was analyzed by the Rietveld refinement using FULLPROF computer program. The crystals were determined to be a rhombohedrally distorted perovskite-like structure with a space group of R3c. SQUID and VSM measurements showed the antiferromagnetic behavior with N,el temperature (T (N)) of 638 and 633 K for x=0.1 and 0.2, respectively. A least-squares fitting program was used to determine the Mossbauer parameters by assuming Lorentzian line shapes. The valence state of Fe ion is Fe3+ relative to the Fe metal, according to the isomer shift (delta) value = 0.39 mm/s at 4.2 K. In determining the inter-atomic binding force in Bi0.9Eu0.1FeO3, the Debye temperature was 486 and 477 K, respectively.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据