Journal of the Korean Magnetics Society (한국자기학회지)

The Korean Magnetics Society (한국자기학회)
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$^{1}H$ Nuclear Magnetic Relaxation in Impure $CuF_{2}.2H_{2}O$

비자성 불순물을 갖는 $CuF_{2}.2H_{2}O$의 수소 핵자기완화 연구

  • C. H. Lee (Department of Physics, Korea University) ;
  • C. E. Lee (Department of Physics, Korea University) ;
  • S. J. Noh (Department of Applied Physics, Dankook University)
  • Published : 1995.10.01
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Abstract

We have studied the temperature dependence of the $^{1}H$ NMR spin-lattice relaxation for the impure $CuF_{2}.2H_{2}O$ over a temperature range from 77 K to room temperature. We find that the remperature dependence of the $^{1}H$ spin-lattice relaxation is dominated by the eletron spin-flip and the Raman process of eletron spin-lattice relaxation. The electron spin-flip exchange energy was calculated to be $1.8(\pm0.04)$ K.

비자성 분순물을 갖는 $CuF_{2}.2H_{2}O$의 수소 핵자기공명을 77-295 K의 온도범위에서 수행하였다. 그 결과 수소의 스핀-격자 완화율을 지배하는 메카니즘이 구리 전자 스핀의 재주넘기(filp)와 전자-포논 상호작용(Raman process)의 변조에 의한 것임을 알 수 있었다. 또한 전자 스핀 재주넘기에 대한 교환에너지 $1.8(\pm0.04)$ K를 구할 수 있었다.

Keywords

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