Physical Review B
The American Physical Society
We report measurements of the elastic moduli as a function of temperature (5–300) K and magnetic ﬁeld (0–2 T) for the Zintl ferromagnet Yb14MnSb11, which is believed to be a rare example of an underscreened Kondo lattice. The elastic moduli measured below the Curie temperature in this complex ferromagnet exhibit unusual lattice stiffening that is independent of the magnetic ﬁeld and can be adequately modeled using the Landau theory.
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