Size distribution control of FePt nanocrystals by superhydride
محورهای موضوعی : Journal of Theoretical and Applied Physics
Sara Sadat Parhizgar
1
(Plasma Physics Research Center, Science and Research Branch, Islamic Azad University)
Seyed Ali Sebt
2
(Plasma Physics Research Center, Science and Research Branch, Islamic Azad University)
کلید واژه: FePt nanoparticle, Size distribution, Reduction method, Superhydride, L1 structure, 75. 50. Tt, 75. 75. +a, 75. 50. Ss,
چکیده مقاله :
AbstractFePt nanoparticle systems with high magnetocrystaline anisotropy in L10 phase are proper candidates for application in magnetic information storage with density more than Gbit/in2. FePt nanoparticles are grown by Pt(acac)2 and FeCl2. 4H2O compounds in phenyl ether solvent using weak reducing agent 1,2Hexadecandiol (C16H34O2) and strong reducing agent superhydride (LiBEt3H) in two steps. Structural and magnetic properties of the nanocrystals are studied by XRD, EDS and VSM analysis. Also, the growth mechanism and the effect of double-stage growth on size distribution and the size of FePt nanoparticles are determined. For this purpose, TEM images and EDS results are used. The results show that such growth as “core-shell” leads to form 5-nm, nearly monosized FePt nanoparticles, in which a relative standard deviation is decreased from 18% to 8%.
