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Absence of hysteresis in the heat capacity of the three-dimensional random-field Ising model

J. Satooka·H. Aruga Katori·A. Tobo·K. Katsumata
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Abstract

Heat capacity measurements on the prototypical three-dimensional random-field Ising model compound Fe0.58Zn0.42F2 have been performed in both of the field-cooling (FC) and zero-field-cooling (ZFC) procedures. There is no evidence of hysteresis between the FC and ZFC protocols within the experimental accuracy. The absence of hysteresis is interpreted based on a magnetic field (H)-temperature (T) phase diagram in which a metastability region exists between the Neel temperature line Tn(H) and Hc1(T), the latter being the lowest critical field line for the local spin flips.

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J. Satooka, H. Aruga Katori, A. Tobo, K. Katsumata. 1998-04-17. Absence of hysteresis in the heat capacity of the three-dimensional random-field Ising model. https://doi.org/10.1103/physrevlett.81.709

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