Evolution of magnetic properties in the vicinity of the Verwey transition in Fe3O4 thin films

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	Evolution of magnetic properties in the vicinity of the Verwey transition in Fe3O4 thin films
	Liu, X. H.; Liu, W.; Zhang, Z. D.; Liu, XH (reprint author), Max Planck Inst Chem Phys Solids, Nothnitzerstr 40, D-01187 Dresden, Germany.; Liu, XH (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
	2017-09-05
发表期刊	AMER PHYSICAL SOC
ISSN	2469-9950
卷号	96 期号:9 页码:-
摘要	We have systematically studied the evolution of magnetic properties, especially the coercivity and the remanence ratio in the vicinity of the Verwey transition temperature (TV), of high-quality epitaxial Fe3O4 thin films grown on MgO (001), MgAl2O4 (MAO) (001), and SrTiO3 (STO) (001) substrates. We observed rapid change of magnetization, coercivity, and remanence ratio at TV, which are consistent with the behaviors of resistivity versus temperature [rho(T)] curves for the different thin films. In particular, we found quite different magnetic behaviors for the thin films on MgO from those on MAO and STO, in which the domain size and the strain state play very important roles. The coercivity is mainly determined by the domain size but the demagnetization process is mainly dependent on the strain state. Furthermore, we observed a reversal of remanence ratio at TV with thickness for the thin films grown on MgO: from a rapid enhancement for 40-nm-to a sharp drop for 200-nm-thick film, and the critical thickness is about 80 nm. Finally, we found an obvious hysteretic loop of coercivity (or remanence ratio) with temperature around TV, corresponding to the hysteretic loop of the.(T) curve, in Fe3O4 thin film grown on MgO.; We have systematically studied the evolution of magnetic properties, especially the coercivity and the remanence ratio in the vicinity of the Verwey transition temperature (TV), of high-quality epitaxial Fe3O4 thin films grown on MgO (001), MgAl2O4 (MAO) (001), and SrTiO3 (STO) (001) substrates. We observed rapid change of magnetization, coercivity, and remanence ratio at TV, which are consistent with the behaviors of resistivity versus temperature [rho(T)] curves for the different thin films. In particular, we found quite different magnetic behaviors for the thin films on MgO from those on MAO and STO, in which the domain size and the strain state play very important roles. The coercivity is mainly determined by the domain size but the demagnetization process is mainly dependent on the strain state. Furthermore, we observed a reversal of remanence ratio at TV with thickness for the thin films grown on MgO: from a rapid enhancement for 40-nm-to a sharp drop for 200-nm-thick film, and the critical thickness is about 80 nm. Finally, we found an obvious hysteretic loop of coercivity (or remanence ratio) with temperature around TV, corresponding to the hysteretic loop of the.(T) curve, in Fe3O4 thin film grown on MgO.
部门归属	[liu, x. h.] max planck inst chem phys solids, nothnitzerstr 40, d-01187 dresden, germany ; [liu, x. h. ; liu, w. ; zhang, z. d.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
学科领域	Physics, Condensed Matter
资助者	Max Planck POSTECH Center for Complex Phase Materials; National Natural Science Foundation of China [51590883, 51331006]; Chinese Academy of Sciences [KJZD-EW-M05-3]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79106
专题	中国科学院金属研究所
通讯作者	Liu, XH (reprint author), Max Planck Inst Chem Phys Solids, Nothnitzerstr 40, D-01187 Dresden, Germany.; Liu, XH (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Liu, X. H.,Liu, W.,Zhang, Z. D.,et al. Evolution of magnetic properties in the vicinity of the Verwey transition in Fe3O4 thin films[J]. AMER PHYSICAL SOC,2017,96(9):-.
APA	Liu, X. H.,Liu, W.,Zhang, Z. D.,Liu, XH ,&Liu, XH .(2017).Evolution of magnetic properties in the vicinity of the Verwey transition in Fe3O4 thin films.AMER PHYSICAL SOC,96(9),-.
MLA	Liu, X. H.,et al."Evolution of magnetic properties in the vicinity of the Verwey transition in Fe3O4 thin films".AMER PHYSICAL SOC 96.9(2017):-.