Toward the direct deposition of L1{sub 0} FePt nanoparticles

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

DOI:https://doi.org/10.1063/1.1855211· OSTI ID:20711650

Jiaoming, Qiu; Judy, Jack H; Weller, Dieter; Jianping, Wang ^[1]

---

1. Center for Micromagnetic and Information Technology (MINT) and Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

In this paper we report a technique that can directly fabricate L1{sub 0} phase FePt nanoparticles. FePt nanoparticles were generated through gas-phase aggregation using a magnetron-sputtering-based nanocluster source. Following the source chamber, an online halogen-lamp heater was used for the L1{sub 0} phase formation during the particles' flight in vacuum. Transmission electron microscopy and vibrating-sample magnetometer data verified the successful fabrication of the L1{sub 0} phase FePt nanoparticles. The coercivity value at 300 K is 1100 Oe for the nanoparticles with online heating. Neon carrier gas was applied to manipulate FePt nanoparticle size and to enhance particle size uniformity. The size dependence of nanoparticle ordering was investigated.

• OSTI ID: 20711650
• 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
AGGLOMERATION
COERCIVE FORCE
DEPOSITION
FABRICATION
FERROMAGNETIC MATERIALS
HEATERS
HYSTERESIS
IRON ALLOYS
LIGHT BULBS
NANOSTRUCTURES
NEON
PARTICLE SIZE
PARTICLES
PLATINUM ALLOYS
SPUTTERING
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS