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Influence of interchain-coupling effects on the low-T properties of the one-dimensional S=1/2 Heisenberg antiferromagnet Yb4As3

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Aoki,  H.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Cichorek,  T.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Gegenwart,  P.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Custers,  J.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Lang,  M.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Steglich,  F.
Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Aoki, H., Cichorek, T., Gegenwart, P., Custers, J., Lang, M., Ochiai, A., et al. (2002). Influence of interchain-coupling effects on the low-T properties of the one-dimensional S=1/2 Heisenberg antiferromagnet Yb4As3. Physica B-Condensed Matter, 312, 367-369. doi:10.1016/S0921-4526(01)01547-2.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-317F-C
Abstract
We have investigated the difference in the low-T specific heat, C(T, B), of single- and multi-domain Yb4As3 crystals in magnetic fields Bless than or equal to4 T. Upon increasing field, which was applied parallel to the trigonal axis, the C(T)/T values of the single-domain sample have been found to be less reduced than that of the multi-domain one. Furthermore, a minimum value of C(T)/T which is unaffected at Bgreater than or equal to1 T is observed for the single-domain sample around 0.25 K. This behavior cannot be explained by the S = 1/2; Heisenberg antiferromagnet with the intrachain coupling determined by the inelastic neutron scattering. The interchain coupling appears to be responsible for the reported C(T)/T behavior below 1 K. (C) 2002 Elsevier Science B.V. All rights reserved.