Title :
Magnetic properties of phase-separated (Ni80Fe20)1-xMnx thin films
Author :
Kim, S.J. ; Lim, D.H. ; Suk Jun Kim ; Yoon, Chong S. ; Kim, Chang K.
Author_Institution :
Dept. of Mater. Sci. & Eng., Hanyang Univ., Seoul, South Korea
Abstract :
(Ni80Fe20)1-xMnx alloy thin films were produced by codepositing Ni80Fe20 and Mn and annealed at 300°C-600°C. In spite of the structural stability predicted by the bulk phase diagram and the interdiffusion evidences observed in the magnetic exchange couples, the (Ni80Fe20)1-xMnx alloy films decomposed into Ni80Fe20 and Mn phases when annealed above 400°C. The phase separated structure closely resembles those of magnetic granular alloys with a strong crystallographic texture. The phase-separated alloys exhibit an inverse giant magnetoresistance as high as 0.5%.
Keywords :
annealing; exchange interactions (electron); ferromagnetic materials; giant magnetoresistance; iron alloys; magnetic thin films; magnetic transitions; manganese alloys; nickel alloys; texture; (Ni80Fe20)1-xMnx; 300 to 600 degC; 400 degC; annealed; bulk phase diagram; codepositing; interdiffusion evidences; inverse giant magnetoresistance; magnetic exchange couples; magnetic granular alloys; magnetic properties; phase separated structure; phase-separated (Ni80Fe20)1-xMnx thin films; strong crystallographic texture; structural stability; Annealing; Couplings; Iron alloys; Magnetic films; Magnetic properties; Magnetic separation; Manganese alloys; Nickel alloys; Structural engineering; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815561
