DocumentCode :
68925
Title :
Nanoscale Composition Control Applied on 
FePtRh Film for Dot Patterning Using Magnetic Phase Change
Author :
Hasegawa, T. ; Kondo, Yuta ; Uebayashi, Kazuhiko ; Arakawa, Asuka ; Ishio, Shunji
Author_Institution :
Dept. of Mater. Sci. & Eng., Akita Univ., Akita, Japan
Volume :
50
Issue :
11
fYear :
2014
fDate :
Nov. 2014
Firstpage :
1
Lastpage :
4
Abstract :
A planar dot pattern was fabricated using the flat-patterning method involving nanoscale composition control. A small percentage of Fe and Pt atoms was locally diffused into an L10 FePtRh film by annealing, resulting in ferromagnetic dots with a diameter of 50 nm and a nonmagnetic spacing with a width of 100 nm. Nanoscale composition profiles around the dots were analyzed by an energy dispersive X-ray detector attached to a transmission electron microscope. Only the area in which the composition crossed the ferromagnetic-nonmagnetic threshold underwent a magnetic phase change. Magnetic force microscopy revealed ferromagnetic dots with a single-domain structure in the nonmagnetic matrix.
Keywords :
X-ray chemical analysis; annealing; ferromagnetic materials; iron alloys; magnetic force microscopy; magnetic thin films; magnetic transitions; nanomagnetics; nanopatterning; platinum alloys; rhodium alloys; transmission electron microscopy; FePtRh; annealing; energy dispersive X-ray detector; ferromagnetic dots; ferromagnetic-nonmagnetic threshold; flat-patterning method; magnetic force microscopy; magnetic phase change; nanoscale composition control; nonmagnetic matrix; planar dot pattern; single-domain structure; transmission electron microscope; Annealing; Frequency modulation; Magnetic hysteresis; Magnetic recording; Magnetic resonance imaging; Metals; Nanoscale devices; Atomic diffusion; FePt; bit-patterned media (BPM); ordered alloy;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2014.2317416
Filename :
6971405
Link To Document :
