Effect of thin carbon layer insertion on the magnetic property and microstructure of CoCrPt/Ti hybrid recording media

X. M. Cheng; X. S. Miao; X. F. Yang; Z. Li; G. Q. Lin; Z. Y. Li

doi:10.1117/12.822640

19 March 2009 Effect of thin carbon layer insertion on the magnetic property and microstructure of CoCrPt/Ti hybrid recording media

X. M. Cheng, X. S. Miao, X. F. Yang, Z. Li, G. Q. Lin, Z. Y. Li

Author Affiliations +

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71250S (2009) https://doi.org/10.1117/12.822640
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

Abstract

CoCrPt/Ti/C, CoCrPt/C/Ti and CoCrPt/C/CoCrPt/Ti thin film were prepared to study the effect of thin C layer insertion on the magnetic properties and microstructure of CoCrPt/Ti hybrid recording media. Surface roughness improvement and C atoms' diffusion to Ti underlayer contribute to optimized magnetic properties in CoCrPt/Ti/C films due to C seedlayer insertion. Very thin C intermediate layer gives rise to smaller magnetic grain size and improved perpendicular coercivity in annealed CoCrPt/C/Ti thin film while thicker C intermediate layer hinders the epitaxial growth relationship between Ti underlayer and Co-alloy magnetic layer. 3nm C intermediate layer in CoCrPt/C/CoCrPt/Ti thin film structure helps to obtain smaller grain size and weaker inter-granular exchange coupling interaction in the magnetic layer after annealing process. C atoms' diffusion into Ti underlayer, Co-alloy magnetic layer or grain boundary in magnetic layer plays an important role in the effect of thin C layer insertion on the magnetic property and microstructure of CoCrPt/Ti hybrid recording media.

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X. M. Cheng, X. S. Miao, X. F. Yang, Z. Li, G. Q. Lin, and Z. Y. Li "Effect of thin carbon layer insertion on the magnetic property and microstructure of CoCrPt/Ti hybrid recording media", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71250S (19 March 2009); https://doi.org/10.1117/12.822640

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KEYWORDS

Thin films

Magnetism

Annealing

Diffusion

Surface roughness

Carbon

Chemical species

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