CoCrPtTa/NiCr媒体における膜厚方向の微細構造変化

概要

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The microstructures of Co_<73>Cr_<18>Pt_6Ta_3/Ni_<95>Cr_5 and Co_<73>Cr_<18>Pt_6Ta_3/Ni_<95>Cr_5/Ti media were investigated in the direction parallel to the film thickness. The Co_<73>Cr_<18>Pt_6Ta_3/Ni_<95>Cr_5 media showed higher perpendicular coercivity, by about 1000 Oe, than that of Co_<73>Cr_<18>Pt_6Ta_3/Ni_<95>Cr_5/Ti media for thickness of more than 50 nm of the CoCrPtTa layer. Results showed that a Ti under layer enhances the preferred orientation of Co(001), which causes increased diameters of grains and magnetic clusters. We consider the difference in size of grains and magnetic clusters of these media to affect their magnetic and noise properties. An under layer that achieves more precise control of both preferred orientation and grain size is required for under layers of perpendicular magnetic recording media.
社団法人日本磁気学会の論文
2001-04-15