Spin-glass behavior in Shastry-Sutherland lattice of Tm$_\textbf{2}$Cu$_\textbf{2}$In

Baidyanath Sahu; R. Djoumessi Fobasso; Andre M. Strydom

doi:10.1016/j.jmmm.2021.168599

paper

Spin-glass behavior in Shastry-Sutherland lattice of Tm $_{2}$ Cu $_{2}$ In

arXiv:2102.08230 · doi:10.1016/j.jmmm.2021.168599

Abstract

The spin-glass behavior in the ferromagnetic phase of $T m_{2} C u_{2} In$ was investigated by dc-, ac-magnetization, and non-equilibrium dynamics characterizations. Arc-melted polycrystalline compound of $T m_{2} C u_{2} In$ crystallizes in $M o_{2} Fe B_{2}$ -type tetragonal structure (space group $P_{4} / mbm$ ). The temperature variation dc-magnetization exhibits a ferromagnetic behavior with Curie temperature $T_{C}$ = 32.5 K. The zero-field cooled (ZFC) and field cooled (FC) magnetic curves show a thermomagnetic irreversible behavior below $T_{C}$ . The field dependence of irreversible temperature follows Almeida-Thouless line. The frequency and ac-driven field-dependent anomalies in ac-susceptibility results indicate the existence of spin-glass state in $T m_{2} C u_{2} In$ . The time dependence of magnetization further supports the spin-glass behavior observed in $T m_{2} C u_{2} In$ . The frequency dependence of the freezing temperature in the real part of ac-susceptibility has been analyzed on the basis power-law divergence and Vogel-Fulcher law. The obtained results revealed that $T m_{2} C u_{2} In$ belongs to a ferromagnetic canonical spin-glass class of compounds.

Spin-glass behavior in Shastry-Sutherland lattice of Tm2​Cu2​In

Abstract

Spin-glass behavior in Shastry-Sutherland lattice of Tm $_{2}$ Cu $_{2}$ In