Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Curie Temperature Shift in Gadolinium Films due to Finite-Size Effects

유한 효과에 의한 Gadolinium 박막의 Curie온도 이동

  • Rhee, Il-Su (Department of Physics, Kyungpook National University) ;
  • Chu, Gyo-Jin (Department of Physics, Kyungpook National University) ;
  • Lee, Eui-Wan (Department of Physics, Kyungpook National University) ;
  • Lee, Sang-Yun (Department of Physics, Kyungpook National University) ;
  • Lee, Chong-Yong (Research Department, Electromic and Telecomunications Research Institute(ERI)) ;
  • Kim, Yaung-Soo (Korea Basic Science Center) ;
  • Kim, Dong-Lak (Korea Basic Science Center) ;
  • Ri, H.C. (Korea Basic Science Center)
  • Published : 1994.09.01
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Abstract

We determine the Curie temperature of thin gadolinium films by the measurement of magnetization as a function of temperature. From these data, we observe the Curie temperature shift in films from the bulk value, and also see the systematic behavior of this shift with thicknesses of films, that is, the larger the shift is, the thinner the film is. In this paper, we analyze and explain these results in light of finite-size scaling theory.

자화도를 측정함으로써 gadolinium박막의 강자성에서 상자성으로의 전이온도를 결정했다. 박막의 전이온도는 박막의 두께가 얇아짐에 따라 점점 더 bulk계의 전이온도보다 낮아지는 것이 관측되었으며 이 현상은 박막계의 유한성에 의해 일어나는 현상으로 알려져 있다. 우리는 이 결과를 유한효과 및 유한 축척이론에 근거하여 설명하였다.

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