Magnetic phase diagrams of the R1‑XR’XMn2(Ge, Si)2 system
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A phenomenological standard two-sublattice mean-field model was discussed. The Mn-Mn interaction is assumed to be linearly dependent on the unit-cell dimensions, giving rise to magnetostrictive phenomena. The (P,T) magnetic phase diagram for R1-xR’xMn2(Ge, Si)2 series of compounds was discussed and the magnetic phase diagram parameters derived from the experimental data were used for the theoretical calculation.
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