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. 2015 Oct 27;5:15054. doi: 10.1038/srep15054

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(a) Temperature dependence of magnetization under zero-field cooled (ZFC) field cooled-cooling (FCC) and field cooled-warming (FCW) protocols. Inset: Expanded view of M_FCW below 50 K. (b) Measurement period (τ = 1/2πf where f is the frequency of H_AC) vs. peak temperature of real part of ac susceptibility . Solid line represents fit to the Vogel-Fulcher model (Eqn. 1). Dashed line represents fit to critical spin glass power law (Eqn. 2). Inset: vs. T at various frequencies.

Inline graphic — (a) Temperature dependence of magnetization under zero-field cooled (ZFC) field cooled-cooling (FCC) and field cooled-warming (FCW) protocols. Inset: Expanded view of M_FCW below 50 K. (b) Measurement period (τ = 1/2πf where f is the frequency of H_AC) vs. peak temperature of real part of ac susceptibility . Solid line represents fit to the Vogel-Fulcher model (Eqn. 1). Dashed line represents fit to critical spin glass power law (Eqn. 2). Inset: vs. T at various frequencies.