Nearly constant magnetic entropy change and adiabatic temperature change in PrGa compound

2014 ◽  
Vol 115 (17) ◽  
pp. 17A938 ◽  
Author(s):  
X. Q. Zheng ◽  
J. Chen ◽  
Z. Y. Xu ◽  
Z. J. Mo ◽  
F. X. Hu ◽  
...  
Keyword(s):  
Temperature Change ◽  
Magnetic Entropy Change ◽  
Entropy Change ◽  
Adiabatic Temperature ◽  
Magnetic Entropy ◽  
Adiabatic Temperature Change

Giant low-field reversible magnetocaloric effect in HoCoGe compound

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106171-106176 ◽  
Author(s):  
Y. Zhang ◽  
Q. Y. Dong ◽  
L. C. Wang ◽  
M. Zhang ◽  
H. T. Yan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Change ◽  
Magnetic Entropy Change ◽  
Entropy Change ◽  
Magnetic Entropy ◽  
Temperature Range ◽  
Low Field ◽  
Adiabatic Temperature Change ◽  
Attractive Candidate

HoCoGe compound shows large magnetic entropy change and adiabatic temperature change, which makes it an attractive candidate for magnetic refrigeration in the low temperature range.

Electrocaloric and electrostrictive effect of polar P(VDF–TrFE–CFE) terpolymers

2013 ◽  
Vol 03 (02) ◽  
pp. 1350015 ◽  
Author(s):  
Sheng-Guo Lu ◽  
Hui Xiong ◽  
Aixiang Wei ◽  
Xinyu Li ◽  
Qiming Zhang
Keyword(s):  
Electric Field ◽  
Temperature Change ◽  
Vinylidene Fluoride ◽  
Dielectric Material ◽  
Entropy Change ◽  
Adiabatic Temperature ◽  
Adiabatic Temperature Change ◽  
Poly Vinylidene Fluoride ◽  
Electrostrictive Effect ◽  
Rigid Ion Model

The electrocaloric effect (ECE) is the adiabatic temperature change or isothermal entropy change caused by the polarization change of a dielectric material when subjected to a change of external electric field. The electrostrictive effect is a form of elastic deformation of a dielectric induced by an electric field, associated with those components of strain which are independent of reversal field direction. It was found that both the ECE, e.g., adiabatic temperature change, and the electrostrictive strain in poly(vinylidene fluoride–trifluoroethylene–chlorofluoroethylene) (P(VDF–TrFE–CFE)) terpolymers are proportional to the square of the electric field. The adiabatic temperature change ΔT of ECE versus electric field can be illustrated using a modified Belov–Goryaga equation. ΔT is proportional to E2 when E is small. For electrostrictive effect, the rigid-ion model assumes that the anharmonic movement of the ions leads to the quadratic strain–electric field relation. The quotient of electrostrictive coefficient Q over the phenomenological coefficient β is empirically a constant, indicating that the larger the electrostrictive coefficient, the larger the ECE, which opens a new way to find out new electrocaloric materials.

Systematic study of the microstructure, entropy change and adiabatic temperature change in optimized La–Fe–Si alloys

2011 ◽  
Vol 59 (9) ◽  
pp. 3602-3611 ◽  
Author(s):  
Jian Liu ◽  
Maria Krautz ◽  
Konstantin Skokov ◽  
Thomas George Woodcock ◽  
Oliver Gutfleisch
Keyword(s):  
Temperature Change ◽  
Systematic Study ◽  
Entropy Change ◽  
Adiabatic Temperature ◽  
Adiabatic Temperature Change
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