Geodesic
Heat capacity and magnetocaloric effect in manganites La$_{0.7}$Sr$_x$Ba$_{0.3-x}$MnO$_3$
Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 1, pp. 87-94

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Results of an experimental study of the heat capacity ($C_p$), as well as direct and indirect measurements of the MCE ($\Delta T$, $\Delta S$) of La$_{0.7}$Sr$_{0.3-x}$Ba$_x$MnO$_3$ samples (${x = 0,\, 0.02,\, 0.05,\, 0.10}$) in the temperature range $80$–$400$ K and in magnetic fields up to $1.8$ T are presented. It is shown that the partial substitution of barium (Ba) for strontium (Sr) shifts $T_C$ and insignificantly decreases the magnetocaloric effect. The maximum value of the change in entropy in a field of $1.8$ T is $\Delta S = 1.6$ J/kg$\cdot$K for $x= 0.02$. The entropy change associated with the disordering of the magnetic system during the ferromagnetic-paramagnetic phase transition is estimated.
Keywords: magnetocaloric effect, heat capacity, manganites, phase transitions. 
@article{CHFMJ_2021_6_1_a7,
     author = {A. B. Gadzhiev and A.G. Gamzatov and A. B. Batdalov and A. M. Aliev and D. Nanto and B. Kurniawan and S.-C. Yu and D.-H. Kim},
     title = {Heat capacity and magnetocaloric effect in manganites  {La}$_{0.7}${Sr}$_x${Ba}$_{0.3-x}${MnO}$_3$},
     journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal},
     pages = {87--94},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_1_a7/}
}
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A. B. Gadzhiev; A.G. Gamzatov; A. B. Batdalov; A. M. Aliev; D. Nanto; B. Kurniawan; S.-C. Yu; D.-H. Kim. Heat capacity and magnetocaloric effect in manganites  La$_{0.7}$Sr$_x$Ba$_{0.3-x}$MnO$_3$. Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 1, pp. 87-94. http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_1_a7/