Anomalous thermal expansion and strong damping of the thermal conductivity of NdMnO${}_3$ and TbMnO${}_3$ due to 4f crystal-field excitations

K. Berggold, J. Baier, D. Meier +6

We present measurements of the thermal conductivity $\kappa$ and the thermal expansion $\alpha$ of NdMnO${}_3$ and TbMnO${}_3$. In both compounds a splitting of the $4f$ multiplet of the $R^{3+}…