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Large low-field magnetoresistance of phase-separated single-crystalline Pr[sub 0.7]Pb[sub 0.3]MnO[sub 3].
- Source :
-
Applied Physics Letters . 5/6/2002, Vol. 80 Issue 18, p3367. 3p. 3 Graphs. - Publication Year :
- 2002
-
Abstract
- A large low-field magnetoresistance (MR) slightly above the metal-insulator transition temperature (234 K) was observed in single-crystalline Pr[sub 0.7]Pb[sub 0.3]MnO[sub 3]. Combining the temperature dependence of magnetization, resistance, and electron spin resonance spectra, it was suggested that phase separation occurs above the Curie temperature; ferromagnetic metallic clusters imbedding in the insulating paramagnetic matrix, and spin-polarized electron tunneling between isolated ferromagnetic clusters should be responsible for the large low-field MR observed. Undoubtedly, this observation opens a window to explore large low-field MR at high temperature, which is very important for the practical application of colossal MR effect. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNETORESISTANCE
*METAL-insulator transitions
*ELECTRON paramagnetic resonance
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 80
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 6579229
- Full Text :
- https://doi.org/10.1063/1.1477940