Orientation-modulated exchange coupling in La0.67Ca0.33MnO3/CaMnO3 bilayer films

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	Orientation-modulated exchange coupling in La0.67Ca0.33MnO3/CaMnO3 bilayer films
	Wang, F. ; Bai, Y. ; Liu, W. ; Zhang, H. R. ; Li, S. K. ; Dai, Z. M. ; Ma, S. ; Zhao, X. G. ; Wang, S. C. ; Wang, Z. J. ; Zhang, Z. D.
刊名	JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
	2017-04-15
卷号	428 页码:372-376
关键词	Spin glass state Exchange coupling Spin flop coupling Exchange bias
ISSN号	0304-8853
通讯作者	Liu, W (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
中文摘要	Epitaxial La0.67Ca0.33MnO3/CaMnO3 (LCMO/CMO) bilayers and the reference single layers were deposited by pulsed laser deposition on (001)-and (110)-oriented SrTiO3 (STO) substrates, allowing us to perform a detailed study of the dependence of exchange coupling on crystal orientations. It is found that the exchange bias (coercive) field of the (110)-oriented LCMO/CMO bilayer are decreased (increased) compared to that of (001)oriented bilayer, due to the enhanced (weakened) Mn3+-Mn4+ ferromagnetic double-exchange interaction of LCMO layer. It is clear that the spin flop coupling that leads to the enhanced coercivity and the spin glass state that results in the exchange bias effect can coexist and are determined by the competition between Mn3+-Mn4+ ferromagnetic double-exchange and Mn4+-Mn4+ antiferromagnetic super-exchange interactions at the interface. We propose that strong Mn3+-Mn4+ ferromagnetic double-exchange interaction facilitates the existence of spin flop coupling, not the formation of spin glass state at the LCMO/CMO interface.
学科主题	Materials Science, Multidisciplinary ; Physics, Condensed Matter
收录类别	SCI
资助信息	National Nature Science Foundation of China [51331006, 51590883, 51271177]; Chinese Academy of Sciences [KJZD-EW-M05-3]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78183]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang, F.,Bai, Y.,Liu, W.,et al. Orientation-modulated exchange coupling in La0.67Ca0.33MnO3/CaMnO3 bilayer films[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2017,428:372-376.
APA	Wang, F..,Bai, Y..,Liu, W..,Zhang, H. R..,Li, S. K..,...&Zhang, Z. D..(2017).Orientation-modulated exchange coupling in La0.67Ca0.33MnO3/CaMnO3 bilayer films.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,428,372-376.
MLA	Wang, F.,et al."Orientation-modulated exchange coupling in La0.67Ca0.33MnO3/CaMnO3 bilayer films".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 428(2017):372-376.