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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/18599

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/18599

Title:	Coupling Strength with Off-axial External Field in Magnetic Tunnel Junction Cells
Authors:	Chao, C. T.;Kuo, C. Y.;Chen, C. C.;Horng, Lance;Chang, Y. J.;Wu, Te-Ho;Isogami, S.;Tsunoda, M.;Takahashi, M.;Wu, Jong-Ching
Contributors:	物理學系
Date:	2011
Issue Date:	2014-06-06T07:19:59Z
Publisher:	American Institute of Physics
Abstract:	A series of hysteresis loops with off-axial external magnetic fields have been measured to identify magnetization reversal properties as well as coupling effects in magnetic tunnel junctions (MTJs). MTJ films, consisting of a synthetic artificial antiferromagnetic pinned layer of CoFeB/Ru/CoFe/IrMn, were patterned into an elliptical cell array with sizes of 200 × 300 nm and 500 × 750 nm. The hysteresis loops were measured using a vibrating sample magnetometer with various directions of the external magnetic field; the angle θ between the external magnetic field (E) and the biasing field of the pinned layer (B) was varied from 0° to 90°. The two significant coupling effects, ascribed to exchange bias between CoFe/IrMn and Ruderman–Kittel–Kasuya–Yosida–like coupling in CoFeB/Ru/CoFe, can be observed in these hysteresis loops. The angular dependence of the hysteresis loops is employed to characterize the variation of these coupling effects in extended and patterned MTJ films.
Relation:	Journal of Applied Physics, 109(7): 07B911
Appears in Collections:	[Department of Physics] Periodical Articles

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