DocumentCode :
861667
Title :
Grain Refining and Decoupling in FePt/SiO 
Nanogranular Films for Magnetic Recording
Author :
Wei, D.H. ; Yu, C.C. ; Fong, S.C. ; Yuan, F.T. ; Chang, H.W. ; You, K.L. ; Liou, Y. ; Chin, T.S. ; Yao, Y.D.
Author_Institution :
Inst. of Phys., Acad. Sinica, Taipei
Volume :
43
Issue :
6
fYear :
2007
fDate :
6/1/2007 12:00:00 AM
Firstpage :
2124
Lastpage :
2126
Abstract :
FePt/SiO2 nanogranular thin films have been prepared by molecular-beam epitaxy system on MgO (001) substrates with the method of insertion dual SiO2 layers into Fe/Pt multilayer films. We report the relationships between the inserting thickness of SiO2 layers and the microstructural and magnetic properties of FePt thin films. It indicated the nanogranular FePt thin films were successfully formed by inserting amorphous SiO2 layers into the Fe/Pt films. The reduction of grain/domain size and isolation of FePt particles can be achieved by such insertion and maintain (001) texture. The average grain size of FePt films with 5-nm SiO2 insert layers is estimated to be around 8 nm, while domain rotation is enhanced depicting a decoupling of intergrain interaction. The isolated grains are less magnetically coupled in the rotation mode and the reversal of magnetization is more independent
Keywords :
ferromagnetic materials; grain refinement; granular materials; iron alloys; magnetic domains; magnetic epitaxial layers; magnetic multilayers; magnetic recording; magnetisation reversal; nanostructured materials; platinum alloys; silicon compounds; (001) texture; FePt-SiO2; MgO; MgO(001) substrates; amorphous layers; domain rotation; domain size; grain refining; grain size; intergrain interaction decoupling; magnetic properties; magnetic recording; magnetization reversal; molecular beam epitaxy; multilayers; nanogranular thin films; Amorphous magnetic materials; Amorphous materials; Grain size; Iron; Magnetic films; Magnetic multilayers; Magnetic properties; Molecular beam epitaxial growth; Substrates; Transistors; Angular dependent coercivity; FePt nanogranular films; SiO$_{2}$
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2007.894175
Filename :
4202963
Link To Document :
