Density of States and Indirect Exchange in Metallic Systems

• Authors: A. Hernando , J. Rojo , J. Gómez Sal , J. Barandiarán
• Languages of publication: EN

Abstracts

EN

The relation between the density of states at the Fermi level and the sign of the indirect coupling in metallic systems is revisited in the framework of a simple model recently outlined by the authors. It is shown that high density of states tends to favor ferromagnetic structures. Some examples which support this idea are indicated. Finally we develop a phenomenological explanation for the antiferromagnetic → ferromagnetic transition induced by heating equiatomic FeRh. The transition is analysed in terms of the increase in the density of states produced by the giant volume expansion associated with the ferromagnetic phase.

Keywords

EN

75.25.+z; 75.30.Et; 75.50.Bb

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.50.Bb: Fe and its alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 6
• Pages: 1227-1234

Dates

published

1996-12

received

1996-07-26

Contributors

author

A. Hernando

• Departamento de Física de Materiales, Universidad Complutense, Madrid, Spain
• Instituto de Magnetismo Aplicado, UCM, CSIC, RENFE, Las Rozas P.O. Box 155, Madrid 28230, Spain

author

J. Rojo

• Departamento de Física de Materiales, Universidad Complutense, Madrid, Spain

author

J. Gómez Sal

• Departamento de Materia Condensada, Universidad de Cantabria, Santander, Spain

author

J. Barandiarán

• Departamento de Electricidad y Electrónica, Universidad del Pais Vasco, Bilbao, Spain

Identifiers

DOI

10.12693/APhysPolA.90.1227