Particulate FePt/Ag(C) films with strong perpendicular anisotropy

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

DOI:https://doi.org/10.1063/1.1855709· OSTI ID:20711641

Wan, J; Huang, Y; Zhang, Y; Bonder, M J; Hadjipanayis, G C; Weller, D ^[1]

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1. Department of Physics, University of Delaware, Newark, Delaware 19716 (United States)

Textured FePt/Ag and FePt/C multilayers have been fabricated by dc magnetron sputtering onto single crystal MgO (100) substrates at elevated temperatures from 280 to 400 deg. C using FePt, Ag, and C targets. Our studies showed that isolated and ordered L1{sub 0} FePt nanoparticles with perpendicular magnetic anisotropy can be formed in these multilayers. The (FePt/Ag) multilayers showed a lower transformation temperature from the disordered fcc to the ordered L1{sub 0} phase than the FePt/C multilayers. The lowest temperature to form the L1{sub 0} phase is found to be 280 deg. C in FePt/Ag multilayers. The c-axis texture can be improved by increasing the thickness of Ag layers. As the deposition temperature is increased, the degree of atomic ordering approaches that of the fully ordered phase. The magnetic and structural properties are consistent with the microstructure studies observed with high-resolution transmission electron microscopy.

• OSTI ID: 20711641
• 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
ANISOTROPY
CARBON
DEPOSITION
FCC LATTICES
FERROMAGNETIC MATERIALS
FILMS
HYSTERESIS
IRON ALLOYS
MAGNESIUM OXIDES
MICROSTRUCTURE
MONOCRYSTALS
NANOSTRUCTURES
PARTICLES
PLATINUM ALLOYS
SILVER
SPUTTERING
TEMPERATURE RANGE 0400-1000 K
TEXTURE
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY