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

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

2008-08-09

arxiv.org/abs/0808.1370v1

Phys. Rev. Lett. 101, 187204 (2008)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

10.1103/PhysRevLett.101.187204

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 $z\nu = 7.8 \pm 0.23$.

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