Magnetocaloric properties of La{sub 1-x}KxMnO{sub 3} manganites
Journal Article
·
· Journal of Experimental and Theoretical Physics
- Russian Academy of Sciences, Amirkhanov Institute of Physics, Dagestan Scientific Center (Russian Federation)
- Moscow State University (Russian Federation)
A technology for obtaining single-phase ceramic samples of La{sub 1-x}K{sub x}MnO{sub 3} manganites, as well as the dependence of their structure parameters on the potassium content, is described. The magnetocaloric effect in the samples has been measured by two direct methods, the classical method and the magnetic field modulation method, and has been calculated from the specific heat data. The values of the magnetocaloric effect obtained by these methods are significantly different. The observed discrepancies have been explained. Correlation between the doping level and the value of the effect has been found. It has been shown that the magnetic-field dependence of variation of the magnetic entropy near T{sub C} in weak fields corresponds to theoretical calculations and that the value of the magnetocaloric effect in high magnetic fields can be predicted using this dependence.
- OSTI ID:
- 22028116
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 3 Vol. 112; ISSN JTPHES; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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