Fabrication and properties of Nd(Tb,Dy)Co/Cr films with perpendicular magnetic anisotropy

Weiming Cheng; Xiangshui Miao; Junbing Yan; Xiaomin Cheng

doi:10.1117/12.845978

23 October 2009 Fabrication and properties of Nd(Tb,Dy)Co/Cr films with perpendicular magnetic anisotropy

Weiming Cheng, Xiangshui Miao, Junbing Yan, Xiaomin Cheng

Proceedings Volume 7517, Photonics and Optoelectronics Meetings (POEM) 2009: Optical Storage and New Storage Technologies; 75170Y (2009) https://doi.org/10.1117/12.845978
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

Abstract

Light rare earth-heavy rare earth-transition metal films (LRE-HRE-TM)have large saturation magnetization (M_s) and are the promising media for hybrid recording. In this paper, Nd(Tb,Dy)Co/Cr films with perpendicular magnetic anisotropy were successfully fabricated onto glass substrate by RF magnetron sputtering and the effects of sputtering technology parameters and Nd substitution for HRE atoms on the magnetic properties were investigated. It was found that when the sputtering power and sputtering time are 250W and 4min, respectively, the magnetic properties of Nd(Tb,Dy)Co/Cr films obtain optimization, perpendicular coercivity, Ms and remanence square ratio(S) of NdTbCo/Cr film reach 3.8kOe, 247emu/cm³ and 0.801, respectively. With the increasing of Nd concentration, Ms increases, while the coercivity (H_c)and the temperature stability of magnetic properties decrease distinctly. These results can be explained by the ferri-magnetic structure of the RE-TM alloy.

Citation Download Citation

Weiming Cheng, Xiangshui Miao, Junbing Yan, and Xiaomin Cheng "Fabrication and properties of Nd(Tb,Dy)Co/Cr films with perpendicular magnetic anisotropy", Proc. SPIE 7517, Photonics and Optoelectronics Meetings (POEM) 2009: Optical Storage and New Storage Technologies, 75170Y (23 October 2009); https://doi.org/10.1117/12.845978

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