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http://dx.doi.org/10.4283/JKMS.2002.12.1.020

Variation of Local Coercivity Distribution in CoCrPt Alloy Films with Pt Composition  

Im, Mi-Young (한국과학기술원 물리학과 및 스핀정보물질연구단)
Choe, Sug-Bong (한국과학기술원 물리학과 및 스핀정보물질연구단)
Shin, Sung-Chul (한국과학기술원 물리학과 및 스핀정보물질연구단)
Publication Information
Journal of the Korean Magnetics Society / v.12, no.1, 2002 , pp. 20-23 More about this Journal
Abstract
The local coercivity distribution of CoCrPt alloy films prepared by dc magnetron sputtering has been investigated by means of a magneto-optical microscope magnetometer (MOMM) capable of simultaneously measuring the local properties on 400 nm spatial resolutions. Serial samples of CoCrPt alloy films were prepared with the Pt composition of a range from 6 to 28 at. %. We find that the local coercivity distribution crosses over from Gaussian to non-Gaussian distribution in CoCrPt alloy films with increasing Pt composition, with increasing trends in the width of the distribution as well as the average local coercivity. Transmission electron microscopy (TEM) studies reveal that our findings are closely correlated with the dependences of the grain size distribution and its average size on Pt concentration.
Keywords
CoCrPt alloy film; local coercivity distribution; grain size distribution; magneto-optical microscope magnetometer (MOMM); microstructure;
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