On the magnetic and electronic properties of NpPdSn

Abstract

We have studied NpPdSn by means of the heat capacity, electrical resistivity, Seebeck and Hall effect, ${}^{237}$Np Mössbauer spectroscopy, and neutron diffraction measurements in the temperature range 2-300 K and under magnetic fields up to 14 T. NpPdSn orders antiferromagnetically below the Néel temperature $T_N$ = 19 K and shows localized magnetism of Np${}^{3+}$ ion with a a doubly degenerate ground state. In the magnetic state the electrical resistivity and heat capacity are characterized by electron-magnon scattering with spin-waves spectrum typical of anisotropic antiferromagnets. An enhanced Sommerfeld coefficient and typical behavior of magnetorestistivity, Seebeck and Hall coefficients are all characteristic of systems with strong electronic correlations. The low temperature antiferromagnetic state of NpPdSn is verified by neutron diffraction and ${}^{237}$Np Mössbauer spectroscopy and possible magnetic structures are discussed.

arXiv commentAccepted for publication in Physical Review Materials (June 7, 2018)

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