Magnetic Exchange—Coupled Sm(Co,R)/Cr(R=Al,Si,Ti,Nb,Cu)series Films for Ultrahigh—Density Longitudinal Recording Media |
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引用本文: | 王翔,李佐宜,等.Magnetic Exchange—Coupled Sm(Co,R)/Cr(R=Al,Si,Ti,Nb,Cu)series Films for Ultrahigh—Density Longitudinal Recording Media[J].中国物理快报,2003,20(2):281-283. |
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作者姓名: | 王翔 李佐宜 |
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作者单位: | [1]InstituteofMicroelecronics,PekingUniversity,Beijing100871 [2]DepartmentofElectronicScienceandTechnology,HuazhongUniversityofScienceandTechnology,Wuhan430074 |
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摘 要: | SmCoR(R=Al,Si,Ti,Nb,Cu)/Cr series films were fabricated as one kind of promising materials for the ultrahigh density longtudinal magnetic recording media.The Sm(Co,Al,Si)/Cr thin with coercivity up to 2.36kOe,squareness ratio S near 0.94 and coercive squareness ratio S^* about 0.9 were obtained.The Cr interlayer caused magnetic decoupling in Sm(Co,Al,Si)/Cr/Sm(Co,Al,Si)thin films,High coercivtty of 3400-3840Oe and extremely fine grain size of 5-8nm for the magnetic layer were examined.Using different substrate bias among the Sm(Co,Al,Si)(deposited with substrate bias of -150V)/Sm(Co,Al,Si)(deposited with no substrate bias)/Sm(Co,Al,Si)(deposited with substrate bias of -150V),the multilayer exhibited high coercivity of 2960Oe and S^* of 0.96,Sm(Co,Al,Si)/Sm(Co,Ti,Cu)/Sm(Co,Nb,Cu) trilayer improved matching between the magnetic layer and the Cr underlayer,and led to increasing in-plane anisotropy,high coercivity of 3280Oe and S* of 0.92,Lattice matching of SmCoR{112} and Cr{110},etc.were found under various conditons.The microstructures of these four kinds of medium were also examined.The results suggest that it is possible to produce Sm(Co,Al,Si,Ti,Nb,Cu)multi-layer media with the combined magnetic properties required for the ultrahigh desity magnetic recording.
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关 键 词: | 薄膜 存储介质 SmCoAlsi |
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