Mandal, P and Choudhury, Pranab and Ghosh, B (2005) Transport studies of metallic La(1-x)A(x)CoO(3) (A = Sr, Ba) ferromagnet. Physica B-Condensed Matter, 359. pp. 1363-1365. ISSN 0921-4526

[img] PDF - Published Version
Restricted to Registered users only

Download (381Kb) | Request a copy


Well below T-C, both resistivity (p) and thermopower (S) of La(1-x)A(x)CoO(3) (A = Sr, Ca, Ba) exhibit T-2 behavior while just below T-C, they show T-4 dependence due to the scattering of charge carriers by magnetic fluctuations. This T-4 dependence of rho close to Tc-C can be suppressed by a magnetic field, leading to a negative bulk magnetoresistance in cobaltates and in other itinerant ferromagnets such as manganites and CrO2. The role of ionic size on T4 dependence of p and S has also been studied. A phase diagram has been constructed for La1-xBaxCoO3 system. (c) 2005 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: International Conference on Strongly Correlated Electron Systems (SCES 04), Karlsruhe, GERMANY, JUL 26-30, 2004
Uncontrolled Keywords: Magnetoresistance; Itinerant ferromagnets; Phase diagram
Subjects: Electronics
Depositing User: Bula Ghosh
Date Deposited: 07 Mar 2012 11:20
Last Modified: 07 Mar 2012 11:20

Actions (login required)

View Item View Item