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Phys. Rev. B 52, R13110–R13113 (1995)

[Issue 18 – 1 November 1995 ]

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Large crystalline-induced magnetic anisotropy and field-direction-dependent magnetoresistance in Co(11-bar00)/Cr(211) superlattices

J. C. A. Huang

Department of Physics, National Cheng-Kung University, Tainan, Taiwan

Y. Liou, Y. D. Yao, W. T. Yang, C. P. Chang, and S. Y. Liao

Institute of Physics, Academia Sinica, Taipei, Taiwan

Y. M. Hu

Department of Physics, National Cheng-Kung University, Tainan, Taiwan

High-quality Co(11-bar00)/Cr(211) superlattices have been successfully prepared and characterized. Excellent heteroepitaxial (hcp/bcc) growth of Co/Cr superlattices was evidenced by fine streaks in reflection high-energy electron diffraction and superlattice satellites in x-ray diffraction. The magnetic hysteresis loops and magnetoresistance (MR) show strong crystalline-induced magnetic anisotropy and a field-direction-dependent MR effect. We have observed large transverse (IperpH) MR up to about 18% with magnetic field H along the in-plane hard axis Co[112-bar0], and current I along the in-plane easy axis Co[0001], and small longitudinal MR (~0.8%) for I||H||Co[112-bar0]. On the other hand, negligible longitudinal and transverse MR's (<0.1%) were observed for H||Co[0001].

©1995 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v52/pR13110
DOI: 10.1103/PhysRevB.52.R13110
PACS: 75.30.Gw, 75.50.Rr, 75.70.Fr

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