Stray field and the superconducting surface spin valve effect in La0.7Ca0.3MnO3/YBa2Cu3O7-delta bilayers

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	Stray field and the superconducting surface spin valve effect in La0.7Ca0.3MnO3/YBa2Cu3O7-delta bilayers
	Hu, T ; Xiao, H ; Visani, C ; Santamaria, J ; Almasan, CC
刊名	NEW JOURNAL OF PHYSICS
	2011
卷号	13
关键词	PHASE-TRANSITION FERROMAGNET FILMS MAGNETORESISTANCE
ISSN号	1367-2630
通讯作者	Almasan, CC (reprint author), Kent State Univ, Dept Phys, Kent, OH 44242 USA.
中文摘要	Electronic transport and magnetization measurements were carried out on La0.7Ca0.3MnO3/YBa2Cu3O7-delta (LCMO/YBCO) bilayers below the superconducting transition temperature in order to study the interaction between magnetism and superconductivity. This study shows that a substantial number of weakly pinned vortices are induced in the YBCO layer by the large out-of-plane stray field in the domain walls. Their motion gives rise to large dissipation peaks at the coercive field. The angular dependent magnetoresistance (MR) data reveal the interaction between the stripe domain structure present in the LCMO layer and the vortices and anti-vortices induced in the YBCO layer by the out-of-plane stray field. In addition, this study shows that a superconducting surface spin valve effect is present in these bilayers as a result of the relative orientation between the magnetization at the LCMO/YBCO interface and the magnetization in the interior of the LCMO layer that can be tuned by the rotation of a small H. This latter finding will facilitate the development of superconductive magnetoresistive memory devices. These low-magnetic-field MR data, furthermore, suggest that triplet superconductivity is induced in the LCMO layer, which is consistent with recent reports on triplet superconductivity in LCMO/YBCO/LCMO trilayers and LCMO/YBCO bilayers.
收录类别	SCI
资助信息	National Science Foundation under KSU [DMR-1006606]; Universidad Complutense de Madrid [2008-06517]; Institute for Complex Adaptive Matter; MOST of China [2009CB929102, 2011CBA00107]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/53128]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Hu, T,Xiao, H,Visani, C,et al. Stray field and the superconducting surface spin valve effect in La0.7Ca0.3MnO3/YBa2Cu3O7-delta bilayers[J]. NEW JOURNAL OF PHYSICS,2011,13.
APA	Hu, T,Xiao, H,Visani, C,Santamaria, J,&Almasan, CC.(2011).Stray field and the superconducting surface spin valve effect in La0.7Ca0.3MnO3/YBa2Cu3O7-delta bilayers.NEW JOURNAL OF PHYSICS,13.
MLA	Hu, T,et al."Stray field and the superconducting surface spin valve effect in La0.7Ca0.3MnO3/YBa2Cu3O7-delta bilayers".NEW JOURNAL OF PHYSICS 13(2011).