Double exchange model for RuSr2(Eu,Gd)Cu2O8
| Autor: | A. A. Aligia, H. Aliaga |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Spins Condensed Matter (cond-mat) FOS: Physical sciences Condensed Matter Electron Spin structure Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Ion Magnetic field Magnetization Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Electrical and Electronic Engineering |
| Zdroj: | Physica B: Condensed Matter. 320:34-36 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/s0921-4526(02)00613-0 |
| Popis: | We propose a double exchange model to describe the RuO_2 planes of RuSr_2(Eu,Gd)Cu_2O_8. The Ru^+5 ions are described by localized spins, and additional electrons provided by the superconducting CuO_2 planes are coupled ferromagnetically to them by Hund rules coupling. We calculate the spin structure factor, magnetic susceptibility and magnetization as a function of magnetic field and temperature, using a Monte Carlo algorithm in which the Ru^+5 spins are treated as classical. Several experiments which seemed in contradiction with one another are explained by the theory. Comment: 3 pages, 3 figs., submitted to LAW3M conference |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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