Coupling strength with off-axial external field in magnetic tunnel junction cells

C. T. Chao, C. Y. Kuo, C. C. Chen, Lance Horng, Y. J. Chang, Te Ho Wu, S. Isogami, M. Tsunoda, M. Takahashi, Jong-Ching Wu

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

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 between the external magnetic field (H → E) and the biasing field of the pinned layer (H → 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.

原文English
文章編號07B911
期刊Journal of Applied Physics
109
發行號7
DOIs
出版狀態Published - 2011 四月 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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