Piezoelectric enhancement of giant magnetoresistance in spin-valves with different magnetic anisotropies

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Piezoelectric enhancement of giant magnetoresistance in spin-valves with different magnetic anisotropies
	Rizwan, S ; Zhang, S ; Yu, T ; Zhao, YG ; Han, XF
刊名	JOURNAL OF APPLIED PHYSICS
	2013
卷号	113 期号:2
ISSN号	0021-8979
通讯作者	Han, XF (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	The phenomenon of giant magnetoresistance (GMR) in spin-valves under applied magnetic field is well established. We present piezoelectric control of the GMR ratio at room temperature for standard multilayered spin-valve structure fabricated on (011)-Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) piezoelectric substrate. Four samples namely, S-1, S-2, S-3, and S-4 were, respectively, fabricated such that the magnetic easy axis makes an initial angle of 0 degrees, 30 degrees, 45 degrees, and 60 degrees with magnetic field applied during measurement. For S-1, the GMR ratio decreases under electric field whereas it increases for the samples making progressively larger initial magnetization angles with the external field. We suggest that for S-1, magnetic alignment between the two magnetic layers decreases due to the rotation of bottom free layer magnetization resulting in the decrease of antiparallel resistance as well as the GMR ratio under applied electric field whereas for the other samples, the antiparallel resistance increases due to improvement in antiparallel alignment between the two magnetic layers causing increase in the GMR ratio at room temperature. Our results establish new way to control and even enhance the magnetoresistance via converse piezoelectric effect in spin-valves with different magnetic anisotropies. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4775574]
资助信息	State Key Project of Fundamental Research of Ministry of Science and Technology [MOST] [2010CB934400, 2009CB929202]; National Natural Science Foundation of China [NSFC] [10934099, 10874225, 51021061]; NSFC; EPSRC of United Kingdom [10911130234]; ANR of France [F040803]; Higher Education Commission (HEC) of Pakistan
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57338]
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	Rizwan, S,Zhang, S,Yu, T,et al. Piezoelectric enhancement of giant magnetoresistance in spin-valves with different magnetic anisotropies[J]. JOURNAL OF APPLIED PHYSICS,2013,113(2).
APA	Rizwan, S,Zhang, S,Yu, T,Zhao, YG,&Han, XF.(2013).Piezoelectric enhancement of giant magnetoresistance in spin-valves with different magnetic anisotropies.JOURNAL OF APPLIED PHYSICS,113(2).
MLA	Rizwan, S,et al."Piezoelectric enhancement of giant magnetoresistance in spin-valves with different magnetic anisotropies".JOURNAL OF APPLIED PHYSICS 113.2(2013).