| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9781554 | Journal of Physics and Chemistry of Solids | 2005 | 8 Pages |
Abstract
We present experimental data of magnetization and magneto-resistance of nanostructured La2/3B1/3MnO3 with B=Ca, Sr, which present difference between the coercive field in the magnetization loop with their corresponding maximum value in the magneto-resistance. This difference is described by a model that include, size distribution of magnetic particles, randomly oriented anisotropy axis and electronic transfer between the particles, which is mediated by spin-polarized tunneling process. Also, the model predicts that the maximum magneto-resistance can be, in the magnetic disorder state, two times larger than the experimental value. The model results can be used to estimate the size dispersion of nanoparticles in similar systems.
Keywords
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
D. GarcÃa, B. Alascio, D.G. Lamas, D. Niebieskikwiat, A. Caneiro, R.D. Sánchez, E.D. Cabanillas,