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    題名: Calorimetric evaluation of magnetic ordering and spin reorientation in Er3Ge4
    作者: Chen, Y. Y.;Yao, Y. D.;Lin, Y. S.;Chang, C. L.;Hamdeh, H. H.;Ho, J. C.
    貢獻者: 淡江大學物理學系
    日期: 2000-01
    上傳時間: 2013-07-09 15:21:44 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: Calorimetric measurements have been made on orthorhombic Er3Ge4 having two crystallographically distinct Er sites. The temperature dependence of specific heat shows a peak near 7 K, confirming the antiferromagnetic ordering of both Er sublattices as suggested by neutron diffraction. A spin reorientation in one of the Er sublattices of the highly canted magnetic structure prevails as a second peak in specific heat around 3.5 K. Both magnetic transitions exhibit no thermal hysteresis. By further taking into account the relatively small contributions from lattice and crystal-field effect, as well as 3R ln 2 for the ordering of all Er3+ with a ground-state doublet, entropy analysis results in a 30 J/mol energy associated with the spin reorientation process.
    關聯: Physical Review B (Condensed Matter and Materials Physics) 61(1), pp.58-59
    DOI: 10.1103/PhysRevB.61.58
    顯示於類別:[物理學系暨研究所] 期刊論文

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