Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La2NiMnO6

被引：390

作者：

Choudhury, D. ^{[1
,2
]}

Mandal, P. ^{[3
]}

Mathieu, R. ^{[4
]}

Hazarika, A. ^{[1
]}

Rajan, S. ^{[1
]}

Sundaresan, A. ^{[3
]}

Waghmare, U. V. ^{[5
]}

Knut, R. ^{[6
]}

Karis, O. ^{[6
]}

Nordblad, P. ^{[4
]}

Sarma, D. D. ^{[1
,6
,7
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[3] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, India

[4] Uppsala Univ, Dept Engn Sci, SE-75121 Uppsala, Sweden

[5] Jawaharlal Nehru Ctr Adv Sci Res, Theoret Sci Unit, Bangalore 560064, Karnataka, India

[6] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[7] CSIR Network Inst Solar Energy, New Delhi, India

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 12期

基金：

瑞典研究理事会;

关键词：

MAGNETORESISTANCE; ORIGIN; OXIDE;

D O I：

10.1103/PhysRevLett.108.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report magnetic, dielectric, and magnetodielectric responses of the pure monoclinic bulk phase of partially disordered La2NiMnO6, exhibiting a spectrum of unusual properties and establish that this compound is an intrinsically multiglass system with a large magnetodielectric coupling (8%-20%) over a wide range of temperatures (150-300 K). Specifically, our results establish a unique way to obtain colossal magnetodielectricity, independent of any striction effects, by engineering the asymmetric hopping contribution to the dielectric constant via the tuning of the relative-spin orientations between neighboring magnetic ions in a transition-metal oxide system. We discuss the role of antisite (Ni-Mn) disorder in emergence of these unusual properties.

引用

页数：5

共 29 条

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[Anonymous], 2004, DIELECTRIC PHENOMENA

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