Cu doping effect on FePt grains prepared by rapid thermal annealing on SiO2 substrate and wall structure in TbFeCo/FePt CGC-like film.

Autor: Itoh, Akiyoshi, Itoh, Yujii, Nanba, Kensuke, Adachi, Yoshiharu, Motohashi, Masataka, Tsukamoto, Arata
Předmět:
Zdroj: Journal of Applied Physics; 4/15/2006, Vol. 99 Issue 8, p08Q906, 3p, 1 Color Photograph, 1 Black and White Photograph, 1 Chart, 3 Graphs
Abstrakt: We report that Cu substitution is effective in raising the degree of (001) crystal orientation of FePt grains prepared by rapid thermal annealing on SiO2. We fabricated coupled granular and continuous (CGC) like films such as TbFeCo on FePt grains. The wall coercivity was about twice that of the TbFeCo single layer film. From three-dimensional micromagnetic simulations with Landau-Lifshitz-Gilbert (LLG) equation, it was confirmed that wall coercivity was enhanced and domain shapes made smooth in CGC film. When the thickness of the TbFeCo layer was thin, wall width was thinner than the theoretical value. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index