Title :
Effect of High Pressure Hydrogen on Crystal Structural Transformation of FePt Nanoparticles at Low Temperature
Author :
Nakaya, M. ; Kanehara, M. ; Yamauchi, M. ; Kitagawa, H. ; Teranishi, T.
Author_Institution :
Univ. of Tsukuba, Ibaraki
Abstract :
This article investigates the effects of high pressure hydrogen treatment on the crystal structure transformations of Fe49Pt51 nanoparticles at low temperatures. L10 FePt nanoparticles were subjected to a 10 MPa hydrogen treatment at 400 degC for 4 hours following a high pressure hydrogen annealing. High pressure hydrogen treatment resulted to ordering peaks and peak shifts in the FePt XRD pattern indicating a structural change in the nanoparticles.
Keywords :
X-ray diffraction; annealing; crystal structure; iron alloys; magnetic fluids; nanoparticles; platinum alloys; solid-state phase transformations; Fe49Pt51; L10 FePt nanoparticles; XRD; annealing; crystal structure transformation; high pressure hydrogen treatment; ordering peaks; peak shifts; pressure 10 MPa; temperature 400 degC; time 4 hour; Amorphous materials; Annealing; Atmosphere; Coercive force; Hydrogen; Iron; Nanoparticles; Self-assembly; Temperature; X-ray scattering;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.376190
