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No.4(pp.111-156)

Home > Issues > Volume 2 (1997) > No.4(pp.111-156)

Magnetic and Magneto-optical Properties of Ni/Pt Multilayers with Perpendicular Magnetic Anisotropy at Room Temperature

Journal of Magnetics, Volume 2, Number 4, 31 Dec 1997, Pages 138-142

G. Srinivas(Department of Physics, Korea Advanced Institute of Science and Technology), Sung-Chul Shin(Department of Physics, Korea Advanced Institute of Science and Technology)

Abstract

The magnetic and magneto-optical properties of Ni/Pt multilayers exhibiting square Kerr hysterisis loops at room temperature were studied. Squared polar Kerr hysterisis loops at room temperature in Ni/Pt multilayer thin films were obtained for the samples prepared by sequential dc magnetron sputter deposition of nickel and platinum with t_Ni=13-21Å and t_Pt=3.5-7.5Å. The coercivity of these multilayers was in the range of 400-1100 Oe. The saturation magnetization was found to show an inverse dependence on nickel sublyaer thickness. About a monolayer of Ni at interface was observed to behave less magnetically than the interior Ni atoms. The polar Kerr rotation exhibited an increasing trend with decreasing wavelength in the spectral range of 7000-4000Å. The maximum of polar Kerr rotation was found to shift to higher wavelengths with increase in nickel sublayer thickness.

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