Ferromagnetic Crossover within the Ferromagnetic Order of U${}_7$Te${}_{12}$

Abstract

We investigate the physical properties of a single crystal of uranium telluride U${}_7$Te${}_{12}$. We have confirmed that U${}_7$Te${}_{12}$ crystallizes in the hexagonal structure with three nonequivalent crystallographic uranium sites. The paramagnetic moments are estimated to be approximately 1 ${\mu }_{\mathrm{B}}$ per the uranium site, assuming a uniform moment on all the sites. A ferromagnetic phase transition occurs at $T_{\mathrm{C}}=48$ K, where the in-plane magnetization increases sharply, whereas the out-of-plane component does not increase significantly. With decreasing temperature further below $T_{\mathrm{C}}$ under field-cooling conditions, the out-of-plane component increases rapidly around $T^{\star }=26$ K. In contrast, the in-plane component hardly changes at $T^{\star }$. Specific heat measurement indicates no $\lambda$-type anomaly around $T^{\star }$, so this is a cross-over suggesting a reorientation of the ordering moments or successive magnetic ordering on the part of the multiple uranium sites.

References in corpus (1)

• Effect of uranium deficiency on normal and superconducting properties in unconventional superconductor UTe${}_2$

Cited by in corpus (3)

• The fate of time-reversal symmetry breaking in UTe2
• Intrinsic low-temperature magnetic properties on the ultra-clean UTe${}_2$ with $T_{\mathrm{c}}$ = 2.1 K revealed by ${}^{125}$Te NMR
• Theoretical Study of Impurity Effects on Superconductivity in UTe2