Unconventional exchange bias in oxide-coated manganese nanoparticles

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	Unconventional exchange bias in oxide-coated manganese nanoparticles
	P. Z. Si; D. Li; J. W. Lee; C. J. Choi; Z. D. Zhang; D. Y. Geng; E. Bruck
	2005
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	87 期号:13
摘要	We report unconventional exchange bias in oxide-coated manganese nanoparticles, in which the Curie temperature of Mn3O4 shell is lower than the Neel temperature of the antiferromagnetic core. The coercivity (873 kA/m) of the nanoparticles, which is more than four times greater than that of bulk Mn3O4, has been enhanced significantly. A considerable enhancement in Curie temperature compared to the bulk was also observed for Mn3O4 in nanoscale. An exchange bias field as large as 400 kA/m was observed due to the strong interfacial exchange coupling. A simple phenomenological model is given to understand these phenomena in this ferri/antiferromagnetic system. (C) 2005 American Institute of Physics.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. korea inst machinery & mat, chang won 641010, south korea. univ amsterdam, van der waals zeeman inst, nl-1018 xe amsterdam, netherlands.;si, pz (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;pzsi@mail.com
关键词	Magnetic-properties Anisotropy
URL	查看原文
WOS记录号	WOS:000232060200060
引用统计	被引频次：79[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35033
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Z. Si,D. Li,J. W. Lee,et al. Unconventional exchange bias in oxide-coated manganese nanoparticles[J]. Applied Physics Letters,2005,87(13).
APA	P. Z. Si.,D. Li.,J. W. Lee.,C. J. Choi.,Z. D. Zhang.,...&E. Bruck.(2005).Unconventional exchange bias in oxide-coated manganese nanoparticles.Applied Physics Letters,87(13).
MLA	P. Z. Si,et al."Unconventional exchange bias in oxide-coated manganese nanoparticles".Applied Physics Letters 87.13(2005).