Progress in Superconductivity

The Korean Superconductivity Society (한국초전도학회)
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Effect of Nitrogen Treatment on the Structure and Magnetic Properties of $RuSr_2(EuCe)Cu_2O_z$ Compound

질소 열처리에 따른 $RuSr_2(EuCe)Cu_2O_z$ 계의 구조 및 자기적 특성

  • Lee, H.K. (Department of Physics, Kangwon National University) ;
  • Kim, Y.I. (Korea Research Institute of Standards and Science) ;
  • Kim, Y.C. (Department of Physics, Pusan National University)
  • Received : 2012.03.09
  • Accepted : 2012.04.10
  • Published : 2012.04.30
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Abstract

Two $RuSr_2(EuCe)Cu_2O_z$ samples (as prepared and after $N_2$ treatment) have been investigated by thermogravimetric (TC) analysis, high-resolution x-ray powder diffraction and magnetization measurements. TG measurements which were carried out in $H_2/Ar$ atmosphere showed that the $N_2$ treatment of the as-prepared sample at $650^{\circ}C$ for 2h leads to a decrease in the oxygen content z by about 0.25. This oxygen depletion was accompanied by an increase in the magnetic transition temperature from 54.0 K to 114.9 K. This magnetic behavior is discussed in connection with the results of Rietveld analysis of the x-ray diffraction data which showed that the $N_2$ treatment resulted in both a significant increase in the rotation angle of the $RuO_6$ octahedra and a decrease in c-lattice parameter of the sample.

Keywords

References

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