%0 Journal Article
%T History dependence of directly observed magnetocaloric effects in (Mn, Fe)As
%A Milan Bratko
%A Kelly Morrison
%A Ariana de Campos
%A Sergio Gama
%A Lesley F. Cohen
%A Karl G. Sandeman
%J Physics
%D 2012
%I arXiv
%R 10.1063/1.4729893
%X We use a calorimetric technique operating in sweeping magnetic field to study the thermomagnetic history- dependence of the magnetocaloric effect (MCE) in Mn0.985Fe0.015As. We study the magnetization history for which a "colossal" MCE has been reported when inferred indirectly via a Maxwell relation. We observe no colossal effect in the direct calorimetric measurement. We further examine the impact of mixed-phase state on the MCE and show that the first order contribution scales linearly with the phase fraction. This validates various phase-fraction based methods developed to remove the colossal peak anomaly from Maxwell-based estimates.
%U http://arxiv.org/abs/1206.2540v1