Granular L1{sub 0} FePt:TiO{sub 2} (001) nanocomposite thin films with 5 nm grains for high density magnetic recording

Journal Article · Mon Jul 21 04:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2953173· OSTI ID:21123993

Ding, Y F; Lim, B C; Hu, J F; Liu, B ^[1]; Chen, J S ^[2]; Ju, G ^[3]

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1. Data Storage Institute, DSI Building, 5 Engineering Drive 1, Singapore 117608 (Singapore)
2. Department of Materials Science and Engineering, National University of Singapore, Singapore 117576 (Singapore)
3. Seagate Research, Seagate Technology, LLC., 1251 Waterfront Place, Pittsburgh, Pennsylvania 15222 (United States)

FePt:TiO{sub 2} (001) thin films were deposited on CrRu/MgO underlayers by dc magnetron cosputtering. The effects of TiO{sub 2} content on microstructure and magnetic properties of the epitaxial FePt (001) films were studied. Experimental results showed that even with 20 vol % TiO{sub 2} doping, FePt films could keep a (001) preferred orientation and perpendicular anisotropy. The FePt:TiO{sub 2} (001) film with 5 nm grain size, adjustable coercivity, and reduced exchange coupling was obtained by doping 20 vol % TiO{sub 2} into FePt film, showing great potential as low noise ultrahigh density perpendicular magnetic recording media.

• OSTI ID: 21123993
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 93; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
COERCIVE FORCE
COMPOSITE MATERIALS
DEPOSITION
EPITAXY
GRAIN ORIENTATION
GRAIN SIZE
IRON ALLOYS
LAYERS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
NANOSTRUCTURES
PLATINUM ALLOYS
SPUTTERING
THIN FILMS
TITANIUM OXIDES