Article Dans Une Revue Scientific Reports Année : 2016

Stable room-temperature ferromagnetic phase at the FeRh(100) surface

Résumé

Interfaces and low dimensionality are sources of strong modifications of electronic, structural, and magnetic properties of materials. FeRh alloys are an excellent example because of the first-order phase transition taking place at ~400 K from an antiferromagnetic phase at room temperature to a high temperature ferromagnetic one. It is accompanied by a resistance change and volume expansion of about 1%. We have investigated the electronic and magnetic properties of FeRh(100) epitaxially grown on MgO by combining spectroscopies characterized by different probing depths, namely X-ray magnetic circular dichroism and photoelectron spectroscopy. We find that the symmetry breaking induced at the Rh-terminated surface stabilizes a surface ferromagnetic layer involving five planes of Fe and Rh atoms in the nominally antiferromagnetic phase at room temperature. First-principles calculations provide a microscopic description of the structural relaxation and the electron spin-density distribution that support the experimental findings.
Fichier principal
Vignette du fichier
srep22383.pdf (3) Télécharger le fichier
Origine Publication financée par une institution

Dates et versions

hal-04866750 , version 1 (06-01-2025)

Licence

Identifiants

Citer

Federico Pressacco, Vojtěch Uhlίř, Matteo Gatti, Azzedine Bendounan, Eric E Fullerton, et al.. Stable room-temperature ferromagnetic phase at the FeRh(100) surface. Scientific Reports, 2016, 6 (1), ⟨10.1038/srep22383⟩. ⟨hal-04866750⟩
9 Consultations
1 Téléchargements

Altmetric

Partager

More