Curie temperature of RE2Fe17 compounds — A Friedel model approach
| Autor: | K.G Suresh, K.V.S Rama Rao, S.D Mahanti |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Length scale
Intermetallic Pressure effects Iron compounds Magnetization Charge transfer Magnetic properties Atom Phenomenological model Materials Chemistry Interstitial modification Magnetic dilution Electronic band structure Substitutional modification Mathematical models Condensed matter physics Magnetic moment Friedel model approach Chemistry Temperature Curie temperature Charge (physics) Band structure General Chemistry Condensed Matter Physics Substitution reactions Chemical modification |
| Zdroj: | Solid State Communications. 106:379-383 |
| ISSN: | 0038-1098 |
| Popis: | The variations of Curie temperature (TC) of RE2Fe17 compounds upon substitutional and interstitial modifications are qualitatively explained using a simple phenomenological equation T C = Cμ eff 2 f( λ d ) . Here μeff is the effective magnetic moment/atom and f( λ d ) is a monotonically increasing function of ( λ d ), where λ is the Friedel length scale and d is the distance between nearest magnetic atoms. The TC variation of substituted compounds can be understood by incorporating the effects of magnetic dilution and charge transfer whereas, in interstitially modified compounds the TC variation can be explained primarily by incorporating the effects of band narrowing. Also, the effect of pressure on the TC is understood by incorporating band broadening effects in the Friedel model. |
| Databáze: | OpenAIRE |
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