SPECIFIC-HEAT AND RESISTIVITY OF A DOUBLE-EXCHANGE FERROMAGNET LA0.7CA0.3MNO3

Authors
PARK SH JEONG YH LEE KB KWON SJ
Citation
Sh. Park et al., SPECIFIC-HEAT AND RESISTIVITY OF A DOUBLE-EXCHANGE FERROMAGNET LA0.7CA0.3MNO3, Physical review. B, Condensed matter, 56(1), 1997, pp. 67-70
Citations number
25
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
1
Year of publication
1997
Pages
67 - 70
Database
ISI
SICI code
0163-1829(1997)56:1<67:SAROAD>2.0.ZU;2-H
Abstract
We have measured the specific heat and resistivity of mixed valence ma nganite La0.7Ca0.3MnO3 as a function of temperature and magnetic field . We demonstrate that the magnetic contribution to the specific heat i n this system is proportional to the temperature coefficient of the re sistivity in the magnetic phase transition region, following the Fishe r-Langer relation. This suggests that a sharp drop in the resistivity of La0.7Ca0.3MnO3 in the transition region is due to the reduction in magnetic scattering.