Effects of an ultrathin MgO inserted layer on the magnetic properties of FePt films

Journal Article · Sun May 15 04:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1855511· OSTI ID:20711680

Wei, D H; Chou, S C; Chin, T S; Yu, C C; Liou, Y; Yao, Y D ^[1]

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1. Department of Materials Science and Engineering, National Tsing-Hua University, HsinChu 300, Taiwan (China)

Face-centered-tetragonal L1{sub 0} Fe/Pt multilayers have been prepared by molecular-beam epitaxy on MgO (001) substrates at 500 deg. C. An ultrathin MgO layer, 1, 3, and 5 nm in thickness, respectively, was inserted into the middle of Fe/Pt multilayers by using an e-beam evaporation without introducing any oxygen source. The insertion of MgO layer effectively reduced the average grain size and the size of magnetic domains. Out-of-plane coercivity of the FePt films decreased with increasing thickness of the MgO insert layer. It was found through the studies of angular dependent coercivity that upon MgO insertion the decrease in coercivity is originated from the weakening of domain-wall motion, while domain rotation is enhanced depicting a decoupling of intergrain interaction.

• OSTI ID: 20711680
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 97; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COERCIVE FORCE
ELECTRON BEAMS
EVAPORATION
FERROMAGNETIC MATERIALS
GRAIN SIZE
HYSTERESIS
IRON
LAYERS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MOLECULAR BEAM EPITAXY
OXYGEN
PERMANENT MAGNETS
PLATINUM
SUBSTRATES
THICKNESS
THIN FILMS
VACUUM COATING