Hc;2〜3kOeのCoCrTaPt媒体のMFMによる磁気クラスター解析

概要

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Magnetic clusters in recorded and demagnetized states were observed by MFM with tip-sample spacings from about 100 nm to 30 nm for Co_<69>Cr_<21>Ta_2Pt_8 longitudinal recording media with coercivities of 2000 to 3000 Oe. The magnetic field distribution on the medium surface was calculated from the measured MFM images, using the integrated transformation and the tip-sample distance transformation. The magnetic cluster size on the medium surface in the demagnetized state was about 130 nm for Co_<69>Cr_<21>Ta_2Pt_8 medium with Hc of 2790 Oe. The half-amplitude pulse width of the isolated magnetization transition (PW_<50>) decreased from about 280 nm to 130 nm when z decreased from 100 nm to 10 nm. The magnetic clusters are considered to originate in the magnetic charge distribution in the local magnetization reversal region.
社団法人日本磁気学会の論文
2000-04-15