Journal of Magnetics

  • 제2권4호
  • /
  • Pages.138-142
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  • 1997
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  • 1226-1750(pISSN)
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  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
권호 표지

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

  • G. Srinivas (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Shin, Sung-Chul (Department of Physics, Korea Advanced Institute of Science and Technology)
  • 발행 : 1997.12.01
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초록

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 tNi=13-21$\AA$ and tPt=3.5-7.5$\AA$. 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 7000-4000 $\AA$. The maximum of polar Kerr rotation was found to shift to higher wavelengths with increase in nickel sublayer thickness.

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