On the magnetic and electronic properties of NpPdSn

TL;DR

This study investigates the magnetic and electronic properties of NpPdSn, revealing antiferromagnetic order below 19 K, strong electronic correlations, and anisotropic spin-wave behavior through comprehensive experimental techniques.

Contribution

First detailed multi-technique analysis of NpPdSn's magnetic and electronic properties, highlighting its antiferromagnetic order and correlated electron behavior.

Findings

NpPdSn orders antiferromagnetically below 19 K

Displays localized Np$^{3+}$ magnetism with a doubly degenerate ground state

Exhibits strong electronic correlations and anisotropic spin-wave spectrum

Abstract

We have studied NpPdSn by means of the heat capacity, electrical resistivity, Seebeck and Hall effect, $^{237}$Np M\"{o}ssbauer 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 N\'eel 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 M\"{o}ssbauer spectroscopy and possible magnetic structures are discussed.