Heat transport of quasi-one-dimensional Ising-like antiferromagnet BaCo_2V_2O_8 in the longitudinal and transverse fields

Abstract

The very-low-temperature thermal conductivity (κ) is studied for BaCo_2V_2O_8, a quasi-one-dimensional Ising-like antiferromagnet exhibiting an unusual magnetic-field-induced order-to-disorder transition. The nearly isotropic transport in the longitudinal field indicates that the magnetic excitations scatter phonons rather than conduct heat. The field dependence of κshows a sudden drop at \sim 4 T, where the system unndergoes the transition from the Néel order to the incommensurate state. Another dip at lower field of \sim 3 T indicates an unknown magnetic transition, which is likely due to the spin-flop transition. Moreover, the κ(H) in the transverse field shows a very deep valley-like feature, which moves slightly to higher field and becomes sharper upon lowering the temperature. This indicates a magnetic transition induced by the transverse field, which however is not predicted by the present theories for this low-dimensional spin system.

arXiv comment5 pages, 4 figures, accepted for publication in Phys. Rev. B

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Cited by in corpus (15)

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• Magnetically controlled quantum thermal devices via three nearest-neighbor coupled spin-1/2 systems
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• Quasispins of vacancy defects in Ising chains with nearest- and next-to-nearest-neighbour interactions
• Thermal Conductivity and Spin State of the Spin Diamond-Chain System Azurite Cu3(CO3)2(OH)2
• Quasispins of vacancy defects and their interactions in disordered antiferromagnets
• Low-temperature thermal conductivity of antiferromagnetic S = 1/2 chain material CuCl_2$\cdot$2((CH_3)_2SO)