Hard/graded exchange spring composite media based on FePt

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3556773· OSTI ID:21560103

Alexandrakis, V; Speliotis, Th; Manios, E; Niarchos, D ^[1]; Fidler, J; Lee, Jehyun ^[2]; Varvaro, G ^[3]

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1. IMS, NCSR Demokritos, Aghia Paraskevi, Attikis, Athens 15310 (Greece)
2. Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10, A-1040 Vienna (Austria)
3. ISM-CNR Area della Ricerca Roma1, Via Salaria km 29.300, C.P. 10, 00016 Monterotondo Scalo (Italy)

Hard-FePt(L1{sub 0})/graded-FePt(L1{sub 0} to A1) exchange spring composite media with perpendicular magnetic anisotropy have been studied. Changing the deposition temperature affects the structural transformation of FePt from cubic phase A1, which is magnetically soft, to the tetragonal phase L1{sub 0}, which is magnetically hard. Using this mechanism we were able to fabricate hard/graded composite films. Magnetic measurements revealed a significant reduction of the composite films' switching fields in comparison with those of the single hard layer.

• OSTI ID: 21560103
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 109; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
ANISOTROPY
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
DEPOSITION
EQUIPMENT
EVALUATION
FILMS
IRON ALLOYS
LAYERS
MAGNETIC MATERIALS
MAGNETS
MATERIALS
PERMANENT MAGNETS
PHASE TRANSFORMATIONS
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
THIN FILMS
TRANSFORMATIONS
TRANSITION ELEMENT ALLOYS