| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1866301 | Physics Letters A | 2007 | 4 Pages |
Abstract
A positive magnetoresistance (MR) is observed in the composites of magnetic nanoparticles and polymer at low temperatures. The MR decreases gradually as temperature increases and becomes negative passing through a crossover temperature regime. The MR attains minimum at 40 K and increases above this temperature. The transport and magnetotransport properties at low temperatures follow Efros-Shklovskii variable range hopping. The negative magnetoresistance has been explained by the quantum interference effect in strongly localized regime.
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Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
S. Shekhar, V. Prasad, S.V. Subramanyam,