Nonmonotonic variation of magnetization in Bi0.8La0.2-xPbxFeO3 (0 ≤ x ≤ 0.2) multiferroics

被引：18

作者：

Ge, J. J. ^{[1
,2
]}

Xue, X. B. ^{[1
,2
]}

Cheng, G. F. ^{[1
,2
]}

Yang, M. ^{[1
,2
]}

You, B. ^{[1
,2
]}

Zhang, W. ^{[1
,2
]}

Wu, X. S. ^{[1
,2
]}

Hu, A. ^{[1
,2
]}

Du, J. ^{[1
,2
]}

Zhang, S. J. ^{[3
]}

Zhou, S. M. ^{[3
]}

Wang, Z. ^{[4
]}

Yang, B. ^{[4
]}

Sun, L. ^{[5
,6
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China

[3] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China

[4] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China

[5] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA

[6] Univ Houston, Texas Ctr Superconduct TcSUH, Houston, TX 77204 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 02期

基金：

美国国家科学基金会;

关键词：

Multiferroic; Crystalline structure; Magnetic property; Ferroelectric property; CRYSTAL;

D O I：

10.1016/j.jmmm.2011.08.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Systematic studies of crystalline structure, magnetic and ferroelectric properties have been performed on polycrystalline Bi0.8La0.2-xPbxFeO3 ceramic samples, in which x changes continuously from 0 to 0.2. Rietveld refinement of the x-ray diffraction (XRD) patterns shows that the compound crystal structure changes gradually from pseudotetragonal to pseudocubic with increasing Pb concentration. Coupled with the structural and compositional changes, magnetic ordering of the samples exhibits significantly non-monotonical variation corresponding to x. The compound remnant magnetization (M-r) and coercivity (H-c) both reach minimum values close to zero at x=0.07. This variation of magnetic property in co-doped samples can be attributed to the extent of suppression of cycloid spin structure in original BiFeO3 with changing x. Unlike magnetic responses, the ferroelectric measurements show that the compounds have monotonical change in the remnant electric dipole polarization (P-r). (c) 2011 Elsevier B.V. All rights reserved.

引用

页码：200 / 204

页数：5

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