Low-dimensional magnetism of BaCuTe$_{2}$O$_{6}$

P. Bag; N. Ahmed; Vikram Singh; M. Sahoo; A. A. Tsirlin; R. Nath

doi:10.1103/PhysRevB.103.134410

paper

Low-dimensional magnetism of BaCuTe $_{2}$ O $_{6}$

arXiv:2102.08046 · doi:10.1103/PhysRevB.103.134410

Abstract

X-ray diffraction, thermodynamic measurements, and density-functional band-structure calculations are used to study the magnetic behavior of BaCuTe $_{2}$ O $_{6}$ , a member of the $A$ CuTe $_{2}$ O $_{6}$ structural family that hosts complex three-dimensional frustrated spin networks with possible spin-liquid physics. Temperature-dependent magnetic susceptibility and heat capacity of the Ba compound are well described by the one-dimensional spin- $\frac{1}{2}$ Heisenberg chain model reminiscent of the Sr analog SrCuTe $_{2}$ O $_{6}$ . While the intrachain coupling $J / k_{B} ≃ 37$ K is reduced compared to 49 K in the Sr compound, the Néel temperature increases from 5.5 K (Sr) to 6.1 K (Ba). Unlike the Sr compound, BaCuTe $_{2}$ O $_{6}$ undergoes only one magnetic transition as a function of temperature and shows signatures of weak spin canting. We elucidate the microscopic difference between the Sr and Ba compounds and suggest that one of the interchain couplings changes sign as a result of negative pressure caused by the Sr/Ba substitution. The Néel temperature of BaCuTe $_{2}$ O $_{6}$ is remarkably insensitive to the magnetic dilution with Zn $^{2 +}$ up to the highest reachable level of about 20%.

10 pages, 11 figures, 3 tables, Accepted in Phys. Rev. B

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Cited by in corpus (1)

Weak three-dimensional coupling of Heisenberg quantum spin chains in SrCuTe $_{2}$ O $_{6}$

Low-dimensional magnetism of BaCuTe2​O6​

Abstract

References in corpus (3)

Cited by in corpus (1)

Low-dimensional magnetism of BaCuTe $_{2}$ O $_{6}$