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Preparation of FePt Nanoparticles by Pulsed Plasma in Liquid Method
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Preparation of FePt Nanoparticles by Pulsed Plasma in Liquid Method
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Journal Article
Preparation of FePt Nanoparticles by Pulsed Plasma in Liquid Method
2017
Overview
FePt alloys are an important class of materials in permanent magnetic applications because of their large uniaxial magnetocrystalline anisotropy and good chemical stability. We have applied the pulsed plasma in liquid method to synthesis nanoparticles. Short duration of pulse and quenching effects of the surrounding liquid limit the size of crystal. That enable synthesis of small size and metastable nanoparticles. In this study, ferromagnetic FePt nanoparticles were successfully synthesized. Face-centered-cubic (FCC) A1-type phase was synthesized from FePt (Fe:PT=50:50, 55:45 in atomic %) alloy rod electrodes using the pulsed plasma in ethanol. The ordered face-centered-tetragonal (FCT) L10-type phase FePt was obtained by annealing the A1-type phase at 400oC for 1 h. The average diameter of L10-type FePt nanoparticles was less than 10 nm. Vibrating Sample Magnetometer (VSM) analysis showed that the coercivity of L10-type nanoparticles was much larger than that of the A1-type phase nanoparticles.
Publisher
Trans Tech Publications, Ltd,Trans Tech Publications Ltd
Subject
ISBN
3038357839, 9783038357834
