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Preparation of Mn-doped BaTiO3 nanoparticles and their magnetic properties

被引：50
|
作者：
Tong, Xiaoran [1 ]
Lin, Yuan-Hua [1 ]
Zhang, Songyin [1 ]
Wang, Yao [1 ]
Nan, Ce-Wen [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 06期
基金：
国家高技术研究发展计划(863计划);
关键词：
Mn-doped BaTiO3 nanoparticles have been synthesized using a hydrothermal method. Phase composition; microstructure; and Raman spectroscopy analysis indicate that a double-phase structure containing both cubic and tetragonal structures can be obtained. Electron paramagnetic resonance and x-ray photoelectron spectroscopy measurements prove that Mn ions exist as a form of Mn2+ in these nanoparticles. Magnetization measurements reveal that a ferromagnetic behavior can be observed in the Mn-doped BaTiO3 at low temperature; and the nominal ratio of Ba/Ti has a great influence on the ferromagnetic properties. This ferromagnetic mechanism can be ascribed to the exchange coupling interaction between the Mn2+ ions and the Ti4+ vacancy. © 2008 American Institute of Physics;
D O I：
10.1063/1.2973202
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Mn-doped BaTiO3 nanoparticles have been synthesized using a hydrothermal method. Phase composition, microstructure, and Raman spectroscopy analysis indicate that a double-phase structure containing both cubic and tetragonal structures can be obtained. Electron paramagnetic resonance and x-ray photoelectron spectroscopy measurements prove that Mn ions exist as a form of Mn 2, in these nanoparticles. Magnetization measurements reveal that a ferromagnetic behavior can be observed in the Mn-doped BaTiO3 at low temperature, and the nominal ratio of Ba/Ti has a great influence on the ferromagnetic properties. This ferromagnetic mechanism can be ascribed to the exchange coupling interaction between the Mn 2, ions and the Ti4+ vacancy. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2973202]
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页数：3
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