Probing the role of cation vacancies on the ferromagnetism of La-doped BiFeO3 ceramics

被引：35

作者：

Ge, Wenna ^{[1
,2
]}

Rahman, Azizur ^{[3
]}

Cheng, Huiru ^{[1
,2
]}

Zhang, Min ^{[3
]}

Liu, Jiandang ^{[1
,2
]}

Zhang, Zengming ^{[4
]}

Ye, Bangjiao ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Ctr Phys Expt, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 449卷

基金：

中国国家自然科学基金;

关键词：

Cation vacancies; Remnant magnetization; Multiferroic materials; POSITRON; MULTIFERROICS; LIFETIME; RAMAN;

D O I：

10.1016/j.jmmm.2017.10.082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single-phase multiferroic Bi1-xLaxFeO3 (x = 0.00, 0.10, 0.20, 0.30, and 0.40) ceramics were studied by positron annihilation lifetime spectroscopy and the effect of the cation vacancies on the magnetism were investigated. Positron lifetime measurements and density-functional theory calculation of positron lifetimes identified the presence of Bi and Fe vacancies. It was observed that when x > 0.20 the Bi monovacancies disappeared gradually and some larger vacancy clusters begin to appear. Magnetic property measurements showed that the remnant magnetization increases greatly when x > 0.20. It is found that the enhanced magnetization is not only due to the suppressed spin cycloid structure, but the variation of cation defects also contributes. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：401 / 405

页数：5

共 31 条

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