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arXiv · 1502.05668

Spin liquid ground state in the frustrated J1-J2 zigzag chain system BaTb2O4

A. A. Aczel·L. Li·V. O. Garlea·J. -Q. Yan·F. Weickert·V. S. Vapf·R. Movshovich·M. Jaime·P. J. Baker·V. Keppens·D. Mandrus
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Abstract

We have investigated polycrystalline samples of the zigzag chain system BaTb$_2$O$_4$ with a combination of magnetic susceptibility, heat capacity, neutron powder diffraction, and muon spin relaxation measurements. Despite the onset of Tb$^{3+}$ short-range antiferromagnetic correlations at $|\theta_{CW}|$ $=$ 18.5 K and a very large effective moment, our combined measurements indicate that BaTb$_2$O$_4$ remains paramagnetic down to 0.095 K. The magnetic properties of this material show striking similarities to the pyrochlore antiferromagnet Tb$_2$Ti$_2$O$_7$, and therefore we propose that BaTb$_2$O$_4$ is a new large moment spin liquid candidate.

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A. A. Aczel, L. Li, V. O. Garlea, J. -Q. Yan, F. Weickert, V. S. Vapf, R. Movshovich, M. Jaime, P. J. Baker, V. Keppens, D. Mandrus. 2015-02-19. Spin liquid ground state in the frustrated J1-J2 zigzag chain system BaTb2O4. https://arxiv.org/abs/1502.05668

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