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Effect of Cr-doping on the magnetic and electrical properties of La0.4Ca0.6MnO3.
- Source :
-
Journal of Applied Physics . Apr2008, Vol. 103 Issue 7, p07F723. 3p. - Publication Year :
- 2008
-
Abstract
- The magnetic and electrical properties of electron-doped manganite La0.4Ca0.6Mn1-yCryO3 polycrystalline samples (y=0.02, 0.04, and 0.06) prepared by a sol-gel technique have been investigated between 5 and 325 K in magnetic fields ranging from 0 to 5 T. Both the M-T and M-H data indicate that these Cr-doped manganites exhibit multiple ferromagnetic phases in which the relative amounts of each phase and temperatures of their appearance change with Cr content. The temperature dependence of the zero-field resistivity indicates that a transition occurs below 150 K from an insulating (semiconducting) behavior to a behavior exhibiting a temperature-independent plateau with the magnitude of a semimetal. In addition a large field-induced behavior is found in both the magnetoresistance and magnetization at temperatures correlated to the ferromagnetic semimetallic phase being induced, which results in a large magnetoresistance at the lowest temperatures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 103
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 48992388
- Full Text :
- https://doi.org/10.1063/1.2838625