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arXiv · 2008.02298

Magnetism of Nd$_2$O$_3$ single crystals near the N\'{e}el temperature

Binod K. Rai·A. D. Christianson·G. Sala·M. B. Stone·Y. Liu·A. F. May
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Abstract

Single crystals of Nd$_2$O$_3$ were grown and characterized using neutron scattering and thermodynamic measurements. Nd$_2$O$_3$ has long-range antiferromagnetic order below $T_{\rm N}$ = 0.55 K and specific heat measurements have demonstrated that a significant amount of the magnetic entropy is released above $T_{\rm N}$. Inelastic neutron scattering experiments reveal a magnetic mode(s) with little dispersion peaked at $\approx$ 0.37 meV that is of greatest intensity below $T_{\rm N}$ but persists above 2$T_{\rm N}$. This persistence of dynamic correlations is likely related to frustrated interactions associated with the nearly-ideal stacked triangular lattice geometry of $J_{\textrm{eff}}$ = 1/2 spins on Nd$^{3+}$ ions. The magnetization is observed to be strongly anisotropic at all temperatures due to crystal field effects, with easy-plane anisotropy observed. A non-compensated magnetic structure is inferred from the temperature-dependence of the magnetization when a magnetic field of sufficient strength is applied within the basal plane near $T_{\rm N}$, and the evolution of the long-range order is summarized in a temperature-field phase diagram.

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Binod K. Rai, A. D. Christianson, G. Sala, M. B. Stone, Y. Liu, A. F. May. 2020-08-05. Magnetism of Nd$_2$O$_3$ single crystals near the N\'{e}el temperature. https://doi.org/10.1103/physrevb.102.054434

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