Easy axis alignment of chemically partially ordered FePt nanoparticles

Journal Article · Mon Feb 07 00:00:00 EST 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1856698· OSTI ID:20637010

Kang, Shishou; Zhiyong, Jia; Shi, Shifan; Nikles, David E; Harrell, J W ^[1]

---

1. Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)

Partially ordered Fe{sub 53}Pt{sub 47} nanoparticles with size around 8 nm were prepared by the simultaneous decomposition of iron pentacarbonyl and platinum acetylacetonate. The high boiling point chemical, hexadecylamine, was used as a solvent, and 1-adamantanecarboxylic acid was used as a stabilizer. X-ray diffraction measurements reveal that as-made FePt particles were partially transformed into the ordered L1{sub 0} phase with some weak superlattice peaks. The room-temperature hysteresis loop and remanence curve suggest a broad distribution of anisotropies in the partially ordered particles. By coating the partially ordered FePt nanoparticles with a polyvinylchloride polymer binder, the particles could be re-dispersed in cyclohexanone. Furthermore, the easy axis of the particles coated with the polyvinylchloride polymer binder could be aligned under an external field. Easy axis alignment was confirmed from both alternating gradient magnetometer and x-ray diffraction measurements.

• OSTI ID: 20637010
• Journal Information: Applied Physics Letters, Vol. 86, Issue 6; Other Information: DOI: 10.1063/1.1856698; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BOILING POINTS
COERCIVE FORCE
CYCLOHEXANONE
FERROMAGNETIC MATERIALS
HYSTERESIS
IRON ALLOYS
MAGNETOMETERS
NANOSTRUCTURES
ORDER-DISORDER TRANSFORMATIONS
PARTICLES
PERMANENT MAGNETS
PLATINUM ALLOYS
POLYMERS
PYROLYSIS
SOLVENTS
SUPERLATTICES
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION