التفاصيل البيبلوغرافية
| العنوان: |
Defect Kinetics and Magnetic Studies of Ion-Irradiated FePt Nanoparticles. |
| المؤلفون: |
Seetala, Naidu V. |
| المصدر: |
AIP Conference Proceedings; 3/15/2009, Vol. 1099 Issue 1, p1022-1025, 4p, 1 Chart, 6 Graphs |
| مصطلحات موضوعية: |
IRRADIATION, PROTONS, NANOPARTICLES, PARTICLES, LOW temperatures, MAGNETIZATION |
| مستخلص: |
We have used 300 keV Al+-irradiation and 1 MeV proton-irradiation to obtain vacancy-migration enhanced phase transformation of FePt nanoparticles at lower temperatures (∼200° C). SRIM-2006 computer code was used to estimate the irradiation parameters and the defect concentrations. Low temperature annealing showed promising results, but further annealing at higher temperatures gave detrimental effects due to lattice strain produced by larger defect clusters. These effects are more prominent in proton-irradiation and the effects of vacancy clusters seem to remain stronger even at higher temperatures. The magnetization results indicate dissociation of vacancy clusters above 600° C. The magnetization studies of 700° C and 800° C annealed particles aged for one year at room temperature showed defect strain release over time. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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