Three-dimensional Sandglass Magnet with Non-Kramers ions

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${}_1^{3+}$ and Tm${}_2^{3+})$ 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 $\mathrm{T}{\mathrm{m}}_1^{3+}$, 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${}_2^{3+}$ may play an important role in accounting for the low temperature spin dynamics behavior observed by $\mu$SR.

References in corpus (6)

• Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
• Experimental identification of quantum spin liquids
• Spin-orbit effects in Na${}_4$Ir${}_3$O${}_8$, a hyper-kagomé lattice antiferromagnet
• Na4Ir3O8 as a 3D spin liquid with fermionic spinons
• Weak quasistatic magnetism in the frustrated Kondo lattice Pr_2Ir_2O_7
• Intrinsic transverse field in frustrated quantum Ising magnets: its physical origin and quantum effects