Title :
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
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;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463605
