Specific heat at the magnetic order transitions in RbFe (MoO4)2
2004
Abstract We measured the low temperature specific heat of antiferromagnetic RbFe(MoO 4 ) 2 single-crystal samples, by means of a microcalorimetric technique, in magnetic fields up to 15 T applied along the ab plane. Peaks in the specific heat vs. temperature were observed at all the magnetic phase transitions present in this system below 4 K. The temperature at which specific heat anomalies were observed are in agreement with earlier neutron scattering results. Additionally, we found that the transition into the paramagnetic state upon heating in a magnetic field of 10 T or larger decreases in increasing fields, extrapolating to zero temperature at an approximate field of 19 T.
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