Title :
Magnetic properties of irradiated highly anisotropic materials
Author :
Ravelosona, D. ; Devolder, T. ; Bernas, H. ; Chappert, C. ; Mathet, V. ; Halley, D. ; Samson, Y. ; Gilles, B. ; Marty, A.
Author_Institution :
Inst. d´´Electron. Fondamentale, Univ. de Paris-Sud, Orsay, France
fDate :
7/1/2001 12:00:00 AM
Abstract :
We have developed an ion irradiation technique that allows us to tune the magnetic properties of several magnetic alloys which are considered as promising candidates for ultra-high density magnetic recording such as FePd, FePt and CoPt3 films. Depending both on the initial microstructure of the films and temperature used during irradiation, the chemical order and the resulting magnetic anisotropy can be either increased or decreased in a very controlled way. We discuss the possible mechanisms involved in ordering processes under irradiation
Keywords :
chemical structure; cobalt alloys; ferromagnetic materials; hard discs; ion beam effects; iron alloys; magnetic anisotropy; magnetic recording; magnetic thin films; palladium alloys; platinum alloys; CoPt3; CoPt3 films; FePd; FePd films; FePt; FePt films; chemical order; ion irradiation technique; irradiated highly anisotropic materials; magnetic alloys; magnetic anisotropy; magnetic properties; ultra-high density magnetic recording; Anisotropic magnetoresistance; Chemicals; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetic recording; Microstructure; Perpendicular magnetic anisotropy; Temperature control; Temperature dependence;
Journal_Title :
Magnetics, IEEE Transactions on
