Magnetic properties and magnetic domains of Nd-Fe-B thin films

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	Magnetic properties and magnetic domains of Nd-Fe-B thin films
	S. L. Chen; W. Liu; D. Zhang; G. H. Gunaratne
	2008
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	103 期号:2
摘要	Anisotropic Nd-Fe-B thin films are fabricated by direct current magnetron sputtering on Si substrates heated to temperatures over a wide range. Surface morphology and magnetic domains of the Nd-Fe-B thin films prepared at different sputtering temperatures (25-600 degrees C) are observed by a scanning probe microscopy. The magnetic domains exhibit a rich variety of textures, changing from striped via maze to cloudlike as the sputtering temperature is increased. Variations in magnetic domains with substrate temperature are discussed using phase components and magnetic anisotropies of the thin films. In addition, patterns of magnetic domains are analyzed using the "disorder functions," a set of characterizations of complex patterns with labyrinthine structures. The disorder function delta(1) and the structure factor delta k do not change appreciably until a substrate temperature of 350 degrees C, but increases significantly beyond 400 degrees C. The disorder in magnetic domains increases with increasing sputtering temperature. A simultaneous enhancement of the anisotropic c texture and the hard-magnetic properties of the thin films are observed. The significant change of the disorder function at T(s)=400 degrees C appears to be a precursor to the hardening of the Nd-Fe-B film. The most disordered magnetic domains of the film with the substrate temperature of 600 degrees C correspond to the optimum magnetic properties, with the maximum energy product (BH)(max) of 22.4 MG Oe. (C) 2008 American Institute of Physics.
部门归属	[chen, s. l.; liu, w.; zhang, d.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [chen, s. l.; liu, w.; zhang, d.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [gunaratne, g. h.] univ houston, dept phys, houston, tx 77204 usa.;liu, w (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wuhan rd, shenyang 110016, peoples r china;wliu@imr.ac.cn
关键词	Oriented Nd2fe14b Films Multilayer Magnets Buffer Layer Microstructure Deposition Patterns Ndfeb Mo Cr Ti
URL	查看原文
WOS记录号	WOS:000252821100070
引用统计	被引频次：15[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/321006/32677
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. L. Chen,W. Liu,D. Zhang,et al. Magnetic properties and magnetic domains of Nd-Fe-B thin films[J]. Journal of Applied Physics,2008,103(2).
APA	S. L. Chen,W. Liu,D. Zhang,&G. H. Gunaratne.(2008).Magnetic properties and magnetic domains of Nd-Fe-B thin films.Journal of Applied Physics,103(2).
MLA	S. L. Chen,et al."Magnetic properties and magnetic domains of Nd-Fe-B thin films".Journal of Applied Physics 103.2(2008).