Magnetoresistance induced by low-field control of phase separation in
- 20 March 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 63 (14) , 144419
- https://doi.org/10.1103/physrevb.63.144419
Abstract
The effect of low magnetic fields on the transport properties of a manganite compound with magnetic phase separation is studied. The different behavior obtained in samples of related to the way in which the low field is applied is consistent with a picture of changes in the metallic fraction induced by the magnetic field in a field-cooled cycle. Using a simple model of conduction through a binary mixture, the interrelation between magnetoresistance, metallic fraction, and percolation temperature is accounted for. A different physical coefficient relating magnetic field and metallic fraction emerges as the relevant parameter in the description of phase separated manganites.
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