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arXiv · 2201.09435

Three-dimensional Sandglass Magnet with Non-Kramers ions

Yan-Xing Yang·Yao Wang·Zhao-Feng Ding·Adrian D. Hillier·Lei Shu
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Abstract

Magnetic susceptibility, specific heat, and muon spin relaxation ($\mu$SR) measurements have been performed on a newly synthesized three-dimensional sandglass-type lattice Tm$_3$SbO$_7$, where two inequivalent sets of non-Kramers Tm$^{3+}$ ions (Tm$^{3+}_1$ and Tm$^{3+}_2)$ show crystal electrical field effect at different temperature ranges. The existence of an ordered or a glassy state down to 0.1~K in zero field is excluded. The low-energy properties of Tm$_3$SbO$_7$ are dominated by the lowest non-Kramers quasi-doublet of $\rm Tm^{3+}_1$, and the energy splitting is regarded as an intrinsic transverse field. Therefore, the low-temperature paramagnetic phenomenon in Tm$_3$SbO$_7$ is explained by a transverse field Ising model, which is supported by the quantitative simulation of specific heat data. In addition, the perturbation from Tm$^{3+}_2$ may play an important role in accounting for the low temperature spin dynamics behavior observed by $\mu$SR.

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Yan-Xing Yang, Yao Wang, Zhao-Feng Ding, Adrian D. Hillier, Lei Shu. 2022-01-24. Three-dimensional Sandglass Magnet with Non-Kramers ions. https://doi.org/10.1103/physrevb.105.174418

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