Spin cycloid quenching in Nd3+-substituted BiFeO3

被引：41

作者：

Chen, P. ^{[1
]}

Guenaydin-Sen, Oe ^{[1
]}

Ren, W. J. ^{[2
,3
]}

Qin, Z. ^{[2
,4
]}

Brinzari, T. V. ^{[1
]}

McGill, S. ^{[5
]}

Cheong, S-W. ^{[2
]}

Musfeldt, J. L. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA

[3] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[4] New Jersey Inst Technol, Newark, NJ 07102 USA

[5] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 01期

基金：

美国国家科学基金会;

关键词：

PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; FERROMAGNETISM; WAVE;

D O I：

10.1103/PhysRevB.86.014407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Chemical substitution is an effective method for tailoring the electronic and magnetic properties of functional materials. In this work, we employ magneto-optical spectroscopy to investigate the behavior of the cycloid -> homogenous ordering transition in Bi1-xNdxFeO3. From the magneto-optical response, we construct a B-T-x phase diagram that shows how the critical field decreases with Nd3+ substitution, an effect that we model with Ginzburg-Landau free energy and harmonic cycloid approximations. Compared with nonmagnetic impurities like La3+, Nd3+ is a stronger quencher and yields nonlinear B-C-x behavior. Spiral magnetic order is quenched when x similar to 0.2. With increasing temperature (T < 90 K), the critical field rises gently, a consequence of magnetic anisotropy changes with temperature. These findings extend our understanding of charge-spin coupling and advance the development of magnetic ferroelectrics.

引用

页数：6

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