Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Crystallization of FePt/MgO(100) magnetic thin films

FePt/MgO(100) 자성박막의 결정화 연구

  • Jeung, Ji-Wook (Dept. of Materials Science and Engineering, Sangju National University) ;
  • Cho, Tae-Sik (Dept. of Materials Science and Engineering, Sangju National University) ;
  • Yi, Min-Soo (Dept. of Materials Science and Engineering, Sangju National University)
  • 정지욱 (국립상주대학교 신소재공학과) ;
  • 조태식 (국립상주대학교 신소재공학과) ;
  • 이민수 (국립상주대학교 신소재공학과)
  • Published : 2005.07.07
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Abstract

The crystallization of FePt/MgO(100) magnetic thin films of various thicknesses has been studied using synchrotron x-ray scattering, atomic force microscope, and vibrating sample magnetometer. In film with a 500-${\AA}$-thick, ordered (fct) FePt phase was dominantly crystallized into perpendicular (001) grains keeping the magnetically easy c-axis normal to the film plane during annealing. In film with a 812-${\AA}$-thick, however, longitudinal (110) grains keeping the c-axis parallel to the film plane were grown on top of the perpendicular (001) grains. The behavior of the magnetic properties was consistent with the thickness dependence of the crystallization. We attribute the thickness dependence of the crystallization to the substrate effect, which prefers the growth of the c-axis oriented perpendicular grains near the film/substrate interfacial area.

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