Resistivity of mixed-phase manganites

Citation
M. Mayr et al., Resistivity of mixed-phase manganites, PHYS REV L, 86(1), 2001, pp. 135-138
Citations number
27
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
1
Year of publication
2001
Pages
135 - 138
Database
ISI
SICI code
0031-9007(20010101)86:1<135:ROMM>2.0.ZU;2-3
Abstract
The resistivity rho (dc) of manganites is studied using a random resistor-n etwork, based on phase separation between metallic and insulating domains. When percolation occurs, both as chemical composition or temperature vary, results in good agreement with experiments are obtained. Similar conclusion s are reached using quantum calculations and microscopic considerations. Ab ove the Curie temperature. it is argued that ferromagnetic clusters should exist in Mn oxides. Small magnetic fields induce large rho (dc) changes and a bad-metal state with (disconnected) insulating domains.