Abstract
In this paper we report a technique that can directly fabricate L 10 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 L 10 phase formation during the particles' flight in vacuum. Transmission electron microscopy and vibrating-sample magnetometer data verified the successful fabrication of the L 10 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.
| Original language | English (US) |
|---|---|
| Article number | 10J319 |
| Journal | Journal of Applied Physics |
| Volume | 97 |
| Issue number | 10 |
| DOIs | |
| State | Published - May 15 2005 |
Bibliographical note
Funding Information:This work was performed as part of the INSIC HAMR ATP Program, with the support of the U.S. Department of Commerce, National Institute of Standards and Technology, Advanced Technology Program, Cooperative Agreement Number 70NANB1H3056. Heraeus Inc. was acknowledged for partial financial support. The authors would like to thank Dr. Stuart Mckernan in the central characterization facility in the University of Minnesota for TEM characterization and the Institute for Rock Magnetism in the University of Minnesota for SQUID measurements.