Enhanced phonon heat conduction correlated with induced ferromagnetic metallic phase in Pr0.65Ca0.35(Mn1-ZCoZ)O-3

Authors
Fujishiro, H Kanoh, S Yamazaki, H Ikebe, M
Citation
H. Fujishiro et al., Enhanced phonon heat conduction correlated with induced ferromagnetic metallic phase in Pr0.65Ca0.35(Mn1-ZCoZ)O-3, J PHYS JPN, 70(9), 2001, pp. 2616-2621
Citations number
22
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
00319015 → ACNP
Volume
70
Issue
9
Year of publication
2001
Pages
2616 - 2621
Database
ISI
SICI code
0031-9015(200109)70:9<2616:EPHCCW>2.0.ZU;2-3
Abstract
The thermal conductivity kappa (T), the diffusivity alpha (T) and the therm al dilatation dL(T)/L have been measured for Pr0.65Ca0.35MnO3 and Pr0.65Ca0 .35(Mn1-ZCoZ)O-3 (Z = 0.02-0.10) crystals under the magnetic field of up to 5 T. By application of high magnetic fields or Co substitution for the Mn site, the ferromagnetic metallic (FM-M) state are induced and kappa (T) and alpha (T) are drastically enhanced below the ferromagnetic transition temp erature T-F. The enhancement is closely related to the relaxation of the lo cal Jahn Teller lattice distortion due to the increased hole mobility in th e FM-M phase.