Enhanced Ferromagnetism and Microwave Dielectric Properties of Bi0.95Y0.05FeO3 Nanocrystals

被引：17

作者：

Hou Zhi-Ling ^{[1
]}

Zhou Hai-Feng ^{[1
]}

Yuan Jie ^{[2
]}

Kang Yu-Qing ^{[2
]}

Yang Hui-Jing ^{[2
]}

Jin Hai-Bo ^{[2
]}

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：

CHINESE PHYSICS LETTERS | 2011年 / 28卷 / 03期

关键词：

MULTIFERROIC BIFEO3; MAGNETIC-PROPERTIES; DOPED BIFEO3; TEMPERATURE; COATINGS; BEHAVIOR;

D O I：

10.1088/0256-307X/28/3/037702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bi0.95Y0.05FeO3 nanocrystals are synthesized by a hydrothermal method, and are crystallized in a rhombohedrally distorted perovskite BiFeO3 structure in the R3c space, with compressive lattice distortion induced by the Y substitution at Bi sites from XRD study. Compared with BiFeO3 gained under similar conditions, the magnetic properties are greatly enhanced, with saturate magnetization of 2.3 emu/g at room temperature. Microwave dielectric properties of Bi0.95Y0.05FeO3 nanocrystals are investigated in the range of 2-18 GHz. The Y substitution results in the increase of permeability and decrease of permittivity, which are attributed to the enhanced spin relaxation of domain wall motion and the weakened electron-relaxation caused by decreasing Fe2+, respectively. The changes for microwave dielectric response could lead to the excellent microwave absorption due to the improvement of the impedance match between BiFeO3 and air.

引用

页数：4

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