TY - JOUR
T1 - Microscopic study on magnetocaloric and electrocaloric effects near the critical point
AU - Honmi, Hitoshi
AU - Hashizume, Yoichiro
AU - Nakajima, Takashi
AU - Okamura, Soichiro
N1 - Funding Information:
One of the authors (Y.H.) is partially supported by JSPS Grant-in-Aid for Young Scientists (B) Grant No. 26800205 .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Adiabatic temperature changes of magnetocaloric/electrocaloric effects are analytically investigated. The analytical studies are based on the microscopic statistical models such as Husimi-Temperley model and Slater model. As a result, we show the characteristic scales of the adiabatic processes correspond to microscopic parameters, namely exchange couplings and Slater energy. The scaled parameter dependence become stronger near the critical point. Furthermore, using a general Hamiltonian method, we clarify the adiabatic temperature changes depend on the relative ratio of characteristic scales. The present study may propose a useful aspect for applications.
AB - Adiabatic temperature changes of magnetocaloric/electrocaloric effects are analytically investigated. The analytical studies are based on the microscopic statistical models such as Husimi-Temperley model and Slater model. As a result, we show the characteristic scales of the adiabatic processes correspond to microscopic parameters, namely exchange couplings and Slater energy. The scaled parameter dependence become stronger near the critical point. Furthermore, using a general Hamiltonian method, we clarify the adiabatic temperature changes depend on the relative ratio of characteristic scales. The present study may propose a useful aspect for applications.
KW - Adiabatic process
KW - Fluctuation
KW - Husimi-Temperley model
KW - Magnetocaloric/electrocaloric effects
KW - Phase transition
KW - Slater model
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U2 - 10.1016/j.physa.2015.03.079
DO - 10.1016/j.physa.2015.03.079
M3 - Article
AN - SCOPUS:84927723779
VL - 433
SP - 126
EP - 135
JO - Physica A: Statistical Mechanics and its Applications
JF - Physica A: Statistical Mechanics and its Applications
SN - 0378-4371
ER -