Assembly of FePt L1{sub 0} nanoparticles grown on MgO(110) with self-organized groove structure

Journal Article · Mon Nov 01 04:00:00 EST 2004 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1794903· OSTI ID:20662154

Okamoto, S; Kitakami, O; Miyazaki, T; Shimada, Y; Takahashi, Y K; Hono, K ^[1]

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1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)

We have fabricated an FePt nanoparticle assembly on a MgO(110) with a self-organized structure. Prior to FePt deposition, the MgO(110) substrate was annealed at 1273 K in air to develop self-organized grooves running along the [110] direction with average periodicity of 14.5 nm. Subsequently a very thin FePt layer with nominal thickness of 1.5 nm was sputtered onto the MgO substrate at 973 K, resulting in FePt L1{sub 0} nanoparticles with 2-4 nm in diameter aligned along the grooves. Each FePt nanoparticle was a L1{sub 0} single crystal with its c-axis tilting 45 deg. or -45 deg. from the substrate normal that corresponds to MgO[100] or [010]. The magnetic properties of the FePt nanoparticle assembly well reflected such c-axis distribution, and their switching behavior almost followed the Stoner-Wohlfarth model.

• OSTI ID: 20662154
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 96; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
ANNEALING
DEPOSITION
EPITAXY
FERROMAGNETIC MATERIALS
IRON ALLOYS
LAYERS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MONOCRYSTALS
NANOSTRUCTURES
PARTICLES
PERIODICITY
PLATINUM ALLOYS
SUBSTRATES
TEMPERATURE RANGE 1000-4000 K
THICKNESS