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arXiv · 0808.1370

Observation of Spin Glass Dynamics in Dilute LiHo$_x$Y$_{1-x}$F$_4$

J. A. Quilliam·S. Meng·C. G. A. Mugford·J. B. Kycia
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Abstract

AC susceptibility measurements are presented on the dilute, dipolar coupled, Ising magnet LiHo$_x$Y$_{1-x}$F$_4$ for a concentration $x = 0.045$. The frequency and temperature dependences of the susceptibility show characteristic glassy relaxation. The absorption spectrum is found to broaden with decreasing temperature suggesting that the material is behaving as a spin glass and not as an exotic spin liquid as was previously observed. A dynamical scaling analysis suggests a spin glass transition temperature of 42.6 mK $\pm 2$ mK with an exponent $zν= 7.8 \pm 0.23$.

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J. A. Quilliam, S. Meng, C. G. A. Mugford, J. B. Kycia. 2008-08-09. Observation of Spin Glass Dynamics in Dilute LiHo$_x$Y$_{1-x}$F$_4$. https://doi.org/10.1103/physrevlett.101.187204

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