The specific heats of ErAg and TbAg between 0.5 and 21 K
- 1 January 1987
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 17 (1) , 243-255
- https://doi.org/10.1088/0305-4608/17/1/028
Abstract
Measurements of the specific heats of ErAg and TbAg are reported; those for TbAg are complicated by the effects of Tb2O3 impurity, but it is shown to be possible to correct for this when the correction is not too large. The main conclusions are: (i) the hyperfine specific heat of ErAg corresponds to an ionic moment of 7.6+or-0.1 mu B for Er3+; (ii) there are magnetic transitions of some complexity in ErAg in the range 10 to 18 K, and the entropy associated with them is close to R in 4, confirming that the crystal-field ground state of Er3+ is Gamma 8(3); (iii) the electronic specific heat coefficients of ErAg and TbAg are 11+or-1 and 7.5+or-0.5 mJ K-2 mol-1; (iv) the hyperfine specific heat of TbAg appears to be anomalously large.Keywords
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