Coercivity and nanostructure in magnetic spinel Mg(Mn,Fe)2O4

被引：38

作者：

Zhang, C. L. ^{[1
]}

Yeo, S.

Horibe, Y.

Choi, Y. J.

Guha, S.

Croft, M.

Cheong, S. -W.

Mori, S.

机构：

[1] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

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

[3] Osaka Prefecture Univ, Dept Phys, Sakai, Osaka 5998531, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 13期

基金：

美国国家科学基金会;

关键词：

MANGANITES; TRANSITION; SYSTEMS; ALLOYS;

D O I：

10.1063/1.2717568

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

When Fe ions in the ferrimagnetic cubic MgFe2O4 are replaced by Jahn-Teller (JT)-active Mn ions, the structure evolves with two-step processes. For example, the quenched cubic MgMn1.5Fe0.5O4 becomes tetragonal and JT distorted with slow cooling. However, with further slow cooling, the clustering tendency of JT-distorted Mn ions induces the formation of a checkerboard nano-self-assembly consisting of Mn-rich (tetragonal, paramagnetic) and -poor (cubic, ferrimagnetic) rods. This morphological evolution accompanies a drastic modification of ferrimagnetic properties, e.g., the magnetic coercivity changes by similar to 25. The nanocheckerboard assembly with ferrimagnetic nanorods with large shape anisotropy can be a platform for ultra high-density memory devices. (c) 2007 American Institute of Physics.

引用

页数：3

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