The influence of underlayers on the magnetic properties of TbFeCo films for hybrid recording

Weiming Cheng; Xiangshui Miao; Junbing Yan; Gengqi Lin

doi:10.1117/12.822633

19 March 2009 The influence of underlayers on the magnetic properties of TbFeCo films for hybrid recording

Weiming Cheng, Xiangshui Miao, Junbing Yan, Gengqi Lin

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71250U (2009) https://doi.org/10.1117/12.822633
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

Abstract

Pt and Ag underlayers with rough surface structure have been prepared onto glass slides by rf magnetron sputtering and the effects of rough underlayers on the magnetic properties of TbFeCo films have been investigated. It was found that rough Pt or Ag underalyers will increase the coercivity, the saturation magnetization and the Kerr rotation angle, enhance the temperature dependence of magneto-optical characteristics. These results can be explained with the pinning effects introduced by rough interfaces and the decrease of the exchange interaction between Tb atom and transition metal atom. A saturation magnetization of 125emu/cm³ and a coercivity of 8.6kOe of Tb₂₁Fe₆₉Co₁₀/Pt at room temperature could be obtained, doping of the LRE elements such as Sm and Nd could increase the Ms of TbFeCo films with rough underlayers. These films become a candidate for high -density hybrid recording media.

Citation Download Citation

Weiming Cheng, Xiangshui Miao, Junbing Yan, and Gengqi Lin "The influence of underlayers on the magnetic properties of TbFeCo films for hybrid recording", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71250U (19 March 2009); https://doi.org/10.1117/12.822633

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