Wednesday, June 5, 2013

1306.0416 (R. Mathieu et al.)

Phase transition in a super superspin glass    [PDF]

R. Mathieu, J. A. De Toro, D. Salazar, S. S. Lee, J. L. Cheong, P. Nordblad
We here confirm the occurrence of spin glass phase transition and extract estimates of associated critical exponents of a highly monodisperse and densely compacted system of bare maghemite nanoparticles. This system has earlier been found to behave like an archetypal spin glass, with e.g. a sharp transition from paramagnetic to non-equilibrium behavior, suggesting that this system undergoes a spin-glass phase transition at a relatively high temperature, $T_g$ $\sim$ 140 K.
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