Toward an understanding of grain-to-grain anisotropy field variation in thin film media
2005; IEEE Magnetics Society; Volume: 41; Issue: 2 Linguagem: Inglês
10.1109/tmag.2004.838074
ISSN1941-0069
AutoresJian-Gang Zhu, Yingguo Peng, David E. Laughlin,
Tópico(s)Characterization and Applications of Magnetic Nanoparticles
ResumoGrain-to-grain anisotropy field variation has become one of the main causes of medium noise, especially in perpendicular thin film media. In this paper, we present an electron microscopy investigation and theoretical analysis on the grain-to-grain anisotropy field variation in various types of thin film recording media. In alloyed film media, the intrinsic grain-to-grain composition variation would present a lower limit on grain size, thereby limiting area recording density. It is also argued that partial ordering in L1/sub 0/ materials such as FePt would yield large anisotropy field variation, especially for low values of order parameter.
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