Synthesis, structure, and magnetic behavior of nanoparticles of cubic ZnMnO3

被引：25

作者：

Rall, James D. ^{[1
]}

Thota, S. ^{[2
]}

Kumar, J. ^{[3
]}

Seehra, M. S. ^{[1
]}

机构：

[1] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA

[2] Indian Inst Technol Guwahati, Gauhati 781039, India

[3] Indian Inst Technol, Kanpur 208016, Uttar Pradesh, India

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 25期

关键词：

MN-O SYSTEM; EXCHANGE-BIAS; PHASE; PRECURSORS;

D O I：

10.1063/1.4729817

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Synthesis and nature of magnetism in ZnMnO3 nanoparticles with cubic spinel structure (a = 8.369 angstrom and size D similar or equal to 25 nm) are reported. Magnetization M vs. H and M vs. T data yield ferrimagnetism with T-N similar or equal to 20 K mu/Mn = 4.46 mu(B), M-S similar or equal to 18.5 emu/g, and a transition at T-S similar or equal to 7K. For T < T-N, coercivity and exchange-bias approach zero at T-N with anomaly at T-S. Using magnetic data and simulations, structure of [Zn2+][Zn1/32+Mn2/33+Mn2/34+square(1)/(3)]O-11/3 with antiparallel moments of Mn4+ and Mn3+ is proposed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729817]

引用

页数：4

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