Magnetocaloric Effect in Sm0.55Sr0.45MnO3 Manganite
| Periodical | Solid State Phenomena (Volumes 168 - 169) |
|---|---|
| Main Theme | Trends in Magnetism |
| Edited by | V. Ustinov |
| Pages | 373-375 |
| DOI | 10.4028/www.scientific.net/SSP.168-169.373 |
| Citation | D.M. Zashchirinskii et al., 2010, Solid State Phenomena, 168-169, 373 |
| Online since | December, 2010 |
| Authors | D.M. Zashchirinskii, A.S. Morozov, L.I. Koroleva, A.M. Balbashov |
| Keywords | Curie Temperature, Magnetic Clusters, Magnetocaloric Effect, Manganite, Paramagnetic Susceptibility |
| Price | US$ 28,- |
Magnetocaloric effect (T-effect) was studied by direct method on three samples of Sm0.55Sr0.45MnO3 manganite: ceramic (C) sample and two single crystals, annealed in oxygen (O) or in air atmosphere (A). The temperature dependence of T-effect T(T) of all the samples has maximum at Tmax equal to 143.3 K for A-sample, 244 K for O-sample, and 143 K for C-sample. In these maxima T values are 0.8 K, 0.41 K, and 0.4 K for A-, O- and C-samples respectively. In addition, the T(T) curve of A-sample has minimum at Tmin = 120 K and T-value in minimum is equal to - 0.1 K. The maximum value of T-effect increases with H up to the maximum field of measurement 14.2 kOe. When this takes place the rate of this increasing is higher at H > 8 kOe than at H < 8 kOe. The above listed peculiarities of T-effect are explained by the presence in the samples of ferromagnetic, antiferromagnetic A-type and antiferromagnetic CE-type clusters.
