Abstract The magnetocaloric properties of samples of Sm0.55Sr0.45MnO3, (Nd0.28Eu0.72)0.55Sr0.45MnO3, and (Nd0.46Tb0.54)0.55Sr0.45MnO3 ceramics have been investigated in fields up to 1.4 T. The adiabatic temperature change was measured by a direct method. It was established that the Curie temperature T C and maximum specific adiabatic temperature change (per Tesla) near T C in Sm0.55Sr0.45MnO3, (Nd0.28Eu0.72)0.55Sr0.45MnO3, (Nd0.46Tb0.54)0.55Sr0.45MnO3 were 126, 112 and 76 K and 1.43, 1 and 1 K/T, respectively. The contributions to the magnetocaloric effect in Sm0.55Sr0.45MnO3 were determined with the help of a thermodynamic model. It was shown that the main contribution at the magnetic phase transition is the contribution related with the exchange energy change.
Doped AMnO3 Perovskites Suitable for Use in Magnetic Cooling Devices
Cryocoolers 13 ; 381-387
2005-01-01
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Curie Temperature , Linear Thermal Expansion , Magnetic Phase Transition , Magnetocaloric Effect , Tolerance Factor Physics , Extraterrestrial Physics, Space Sciences , Strongly Correlated Systems, Superconductivity , Optics, Optoelectronics, Plasmonics and Optical Devices , Imaging / Radiology , Automotive Engineering
Doped AMnO~3 Perovskites Suitable for Use in Magnetic Cooling Devices
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