Griineisen crystal field

Fig. 22. (a) Hypothetical plot of the specific heat Ct = C( p + Ck with two contributions, a Kondo contribution with 7 k = 2 and a crystal-field contribution Cc centered at Cf 10. (b) Temperature variation of the ratios C-g lCj and Ccp/Cy. (c) Temperature-dependent Griineisen parameter for the case = 10 and obtained from eq. (17). 

Fig. 27. The temperature-dependent Griineisen parameter for CeRujSij deduced from data for C(T) and j T) and using eq. (1). Use of eq. (8) with 90 and flcF = -5 3 allows separation of the thermal expansion into Kondo and crystal-field contributions (open symbols in the middle and bottom plots). These are compared to the predictions of a resonance-level approximation for a Kondo doublet with Tk = 19K (solid line, middle plot) and a Schottky anomaly with Acf = 288 K (solid line, bottom plot). Data from Lacerda et al. (1989a).

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