
The hf parameters and the relaxation rate of Yb3+ in YbES are deduced from the 170Yb Mössbauer spectra between 1.3 and 30 K. The shielding factors R ࣃ 0.24 and σ2 ࣃ 0.61 are derived from the experiments. The thermal variation of the relaxation rate observed between 8 and 25 K shows an additional exponential term to the previously observed Orbach and Raman processes, which is attributed to an optical mode of phonons.
[PHYS.HIST] Physics [physics]/Physics archives
[PHYS.HIST] Physics [physics]/Physics archives
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