The perturbation functions (-A22G22 (t)) for 140Ce probe nuclei in LaMn2(Si(1− x )Ge x )2. The solid lines are the least square fit to the theoretical function.
(a) Temperature dependence Bhf at La sites measured with 140Ce inLaMn2(Si0.8Ge0.2)2. The solid line represents the Brillouin curve for J Mn = 5/2. (b) Variation of the TC with Ge concentration x for LaMn2(Si(1− x )Ge x )2.
Magnetic hyperfine field (Bhf ), Curie temperature (TC ), critical exponent (β), and Mn-Mn distance ( ) for the studied compounds. TC and β were obtained from the fit of the critical exponent function (see text). values were extracted from XRD results.
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