Magneto-Optical and Magnetic Properties of DySmCo/Cr Thin Films

F. Jin; Z.Y. Li; Z.X. Huang; X. Dan; Z. Li; X.H. Xu; X.M. Cheng; G.Q. Lin

doi:10.3379/tmjpn2001.4.208

F. Jin, Z.Y. Li, Z.X. Huang, X. Dan, Z. Li, X.H. Xu, X.M. Cheng, G.Q. Lin

Author information

F. Jin
Department of Electronic Science and Technology, Huazhong University of Science and Technology
Z.Y. Li
Department of Electronic Science and Technology, Huazhong University of Science and Technology
Z.X. Huang
Department of Physics, Huazhong Normal University
X. Dan
Department of Physics, Huazhong Normal University
Z. Li
Department of Electronic Science and Technology, Huazhong University of Science and Technology
X.H. Xu
Department of Electronic Science and Technology, Huazhong University of Science and Technology
X.M. Cheng
Department of Electronic Science and Technology, Huazhong University of Science and Technology
G.Q. Lin
Department of Electronic Science and Technology, Huazhong University of Science and Technology

Keywords: hybrid recording media, heavy rare earth-transition metal (HRE-TM), light rare earth-heavy rare earth-transition metal (LRE-HRE-TM), magnetic properties

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2004 Volume 4 Issue 4-2 Pages 208-210

DOI https://doi.org/10.3379/tmjpn2001.4.208

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Abstract

SmDyCo/Cr films have been prepared by an r.f magnetron sputtering system. The Cr underlayer was found to play an important role in increasing the coercivity (Hc) in the DyCo films because of the formation of granular structure. The effects of Dy substituted by Sm on the magnetic and magneto-optical properties of DyCo/Cr films have been investigated. By analyzing the figure of Ms*Hc vs. Sm concentration, optimum Sm concentration should be found between 16-22 at% to obtain maximum Ms*Hc. With increasing Sm concentration, the Ms is steadily increased, while the He is slightly decreased. With the increasing of Sm concentration, the reflectivity (R) and Kerr rotation angle (θA_k) are increased. It is believed that by choosing optimal sputtering conditions and suitable Sm substituting fraction, larger Ms and higher He can be obtained at room temperature for (Sm_xDy_1-x)₃₆Co₆₄ films.

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