New magnetic regime in hematite hollow spheres

被引：15
作者：
Ma, Ji [1 ]
Chen, Kezheng [1 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Lab Funct & Biomed Nanomat, Qingdao 266042, Peoples R China
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2012年 / 6卷 / 07期
基金：
中国国家自然科学基金;
关键词：
hematite; ferromagnetism; antiferromagnetism; paramagnetism; EXCHANGE BIAS; NANOPARTICLES; BEHAVIOR; BILAYERS;
D O I：
10.1002/pssr.201206173
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new magnetic regime is presented in hematite hollow spheres. The numerous dangling bonds, formed in the H+ etching process during fabrication, endow the surfaces of the primary particles with paramagnetic and ferrimagnetic attributes. The freezing and coupling of these surface states have profound effect on the magnetic performance of the host hematite spheres including enhanced ferromagnetism, a peculiar variation of thermal remanent magnetization, and an exchange bias training effect, which may find their potential applications in spintronic fields. (3 (c) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
引用
收藏
页码：324 / 326
页数：3
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