The Temperature Dependence of the Hyperfine Coupling Constant of Eu^<++> (4f^7) in CaF_2 and SrF_2

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概要

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• The electron spin resonance of Eu^<++> in SrF_2 have been studied from 4°K to 800°K. The experiment showed that the hyperfine coupling constant A decreased in magnitude by approximately 3.5% over that temperature range. The calculation of the temperature dependence of A is made by using the mechanism proposed by Simanek and Orbach with the introduction of the "modified Debye temperature." The contribution due to acoustic phonons and optical phonons are calculated separately, the theoretical prediction agrees well with the experimental values. The zero-point contribution to the hyperfine coupling constant is -1.73×10^<-10> cm^<-1> and the hyperfine coupling constant in the "rigid lattice" at T=0°K is -34.42×10^<-4>cm^<-1>.

• 社団法人日本物理学会の論文
• 1970-05-05

著者

• Huang Chao-yuan

  Department Of Physics Case Western Reserve University

• LUE Juh-Tzeng

  Department of Physics, National Tsing Hua University

• Lue Juh-tzeng

  Department Of Physics Duke University:national Tsing Hua University

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