Ion-beam-induced magnetic and structural phase transformation of Ni-stabilized face-centered-cubic Fe films on Cu(100)

Metastable face-centered cubic (fcc) Fe/Cu(100) thin films are good candidates for ion-beam magnetic patterning due to their magnetic transformation upon ion-beam irradiation. However, pure fcc Fe films undergo spontaneous transformation when their thickness exceeds 10 ML. This limit can be extended...

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Bibliographic Details
Published in:Applied physics letters 2013-12, Vol.103 (26)
Main Authors: Gloss, Jonas, Shah Zaman, Sameena, Jonner, Jakub, Novotny, Zbynek, Schmid, Michael, Varga, Peter, Urbánek, Michal
Format: Article
Language:English
Subjects:
Alloying
Applied physics
CARBON MONOXIDE
Copper
Dependence
DEPOSITION
FCC LATTICES
Gamma phase
ION BEAMS
Iron
IRON ALLOYS
IRRADIATION
MATERIALS SCIENCE
Nickel
NICKEL ALLOYS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
Phase transitions
PHASES
THICKNESS
THIN FILMS
Transformations
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Summary:Metastable face-centered cubic (fcc) Fe/Cu(100) thin films are good candidates for ion-beam magnetic patterning due to their magnetic transformation upon ion-beam irradiation. However, pure fcc Fe films undergo spontaneous transformation when their thickness exceeds 10 ML. This limit can be extended to approximately 22 ML by deposition of Fe at increased CO background pressures. We show that much thicker films can be grown by alloying with Ni for stabilizing the fcc γ phase. The amount of Ni necessary to stabilize nonmagnetic, transformable fcc Fe films in dependence on the residual background pressure during the deposition is determined and a phase diagram revealing the transformable region is presented.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4856775