Enhanced ferromagnetism and microwave absorption properties of BiFeO3 nanocrystals with Ho substitution

被引：82
作者：
Hou, Zhi-Ling [1 ]
Zhou, Hai-Feng [1 ]
Kong, Ling-Bao [1 ]
Jin, Hai-Bo [2 ]
Qi, Xin [1 ]
Cao, Mao-Sheng [2 ]
机构：
[1] Beijing Univ Chem Technol, Sch Sci, Beijing 100029, Peoples R China
[2] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
来源：
MATERIALS LETTERS | 2012年 / 84卷
基金：
中国国家自然科学基金;
关键词：
Microwave absorption; BiFeO3; Nanoparticles; Multiferroic; Sol-gel; Substitution; COMPLEX PERMITTIVITY; PERMEABILITY;
D O I：
10.1016/j.matlet.2012.06.050
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ho doped BiFeO3 nanoparticles were synthesized by a sot-gel method, and their magnetic and microwave absorption properties were investigated. X-ray diffraction pattern shows that Ho ions occupy the Bi site in BiFeO3. The Ho substitution is found to enhance ferromagnetic properties, which attributed to the destruction of spin cycloid structure and the emergence of exchange interaction between Ho 4f electrons and Fe 3d electrons. Microwave magnetic loss also shows an obvious increase in the range of 2-18 GHz for high level substitution, caused mainly by the natural ferromagnetic resonance at microwave frequencies. Furthermore, microwave absorbing bandwidth and intensity are greatly improved due to the better electromagnetic match property of BiFeO3 with Ho substitution. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：110 / 113
页数：4
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