Microstructure and magnetic properties of granular nanocomposite FePt/Ag multilayer films

Author

Chen, S.C. ; Kuo, P.C. ; Sun, A.C. ; Chou, C.Y. ; Fang, Y.H. ; Kuo, S.Y.

Author_Institution

Dept. of Mech. Eng., De Lin Inst. of Technol., Taipei, Taiwan

fYear

2005

fDate

4-8 April 2005

Firstpage

353

Lastpage

354

Abstract

FePt magnetic layer and Ag top layer are deposited subsequently onto the MgO underlayer and annealed at 400°C for 30 min. It is found that a large Hc_|| value of about 3923 Oe with nano-grain of about 8 nm can be obtained after annealing at 400 °C, and that the Hc_⊥ value of the MgO/FePt/Ag films increases with increasing annealing temperature. After TEM-EDS analysis of the multilayer films, it is found that Ag mainly distributed at the grain boundary of FePt that resulted in the increase of the grain boundary energy, enhancing the coercivity and changing the preferred orientation of FePt film.

Keywords

annealing; coercive force; ferromagnetic materials; grain boundaries; iron alloys; magnesium compounds; magnetic multilayers; nanocomposites; platinum alloys; silver; transmission electron microscopy; 30 min; 400 degC; MgO-FePt-Ag; TEM-EDS analysis; annealing; coercivity; grain boundary; granular nanocomposite; magnetic layer; microstructure; multilayer films; nano-grain; orientation; top layer; underlayer; Annealing; Coercive force; Grain boundaries; Magnetic films; Magnetic multilayers; Magnetic properties; Materials science and technology; Microstructure; Nonhomogeneous media; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463605

Filename

1463605