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Proceedings Paper

The influence of underlayers on the magnetic properties of TbFeCo films for hybrid recording
Author(s): Weiming Cheng; Xiangshui Miao; Junbing Yan; Gengqi Lin
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Paper 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.

Paper Details

Date Published: 20 March 2009
PDF: 6 pages
Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71250U (20 March 2009); doi: 10.1117/12.822633
Show Author Affiliations
Weiming Cheng, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Xiangshui Miao, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Junbing Yan, Wuhan National Lab. for Optoelectronics, Huazhong Univ. of Science and Technology (China)
Gengqi Lin, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)


Published in SPIE Proceedings Vol. 7125:
Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage
Fuxi Gan, Editor(s)

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