Theory of colossal magnetoresistance in manganites
| Autor: | C M Srivastava |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Colossal magnetoresistance
Condensed matter physics Chemistry Resistivity Giant Magnetoresistance Distortion Giant magnetoresistance Perovskite Condensed Matter Physics Polaron Manganite Bond order Ca-Mn-O Condensed Matter::Materials Science Magnetization Lamno3 Electrical resistivity and conductivity Metal Transition Condensed Matter::Strongly Correlated Electrons General Materials Science Spin (physics) State Films |
| Zdroj: | Journal of Physics: Condensed Matter. 11:4539-4555 |
| ISSN: | 1361-648X 0953-8984 |
| Popis: | The recent attempt to account for the existence of several magnetic phases in insulating perovskite manganites in terms of the interplay between the orbital and spin orders produced by the localized e(g) and t(2g) electrons is extended to the metallic state which is obtained on doping. It is shown that the activation energy for electrical conductivity obtained on the basis of the correlated polaron transport depends on the product of the spin and bond order parameters which changes rapidly near the magnetic transition temperature and accounts for the existence of colossal magnetoresistance in this system. |
| Databáze: | OpenAIRE |
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