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- Title
Dependence of the heat capacity of La<sub>1− x </sub>Ag<sub> x </sub>MnO<sub>3</sub> manganites on the Ag content.
- Authors
Gamzatov, A. G.; Abdulvagidov, Sh. B.; Aliev, A. M.; Batdalov, A. B.; Mel'nikov, O. V.; Gorbenko, O. Yu.
- Abstract
The heat capacity of La1− x Ag x MnO3 manganites with x = 0.1, 0.15, and 0.2 is measured in the temperature range 77–350 K. An analogy between the effect of doping and the effect of a magnetic field on the temperature dependence of heat capacity of the La1− x Ag x MnO3 system is revealed. As lanthanum is replaced by silver, the volume fraction of the ferromagnetic phase increases, while, in the paramagnetic state, the Jahn-Teller distortions are eliminated. The results of the aforementioned measurements suggest that the phase transition near the Curie point is caused by the competition between the Coulomb and exchange electrostatic interactions. The comparison of the concentration dependences of T C for La1− x Sr x MnO3 and La1− x Ag x MnO3 points to good potentialities of the latter system from the viewpoint of applications.
- Subjects
MAGNETIC fields; LANTHANUM; SILVER; FERROMAGNETIC materials; JAHN-Teller effect
- Publication
JETP Letters, 2007, Vol 86, Issue 5, p340
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364007170134