Please use this identifier to cite or link to this item:
Title: Ferromagnetic nano-dot array fabricated by electron beam radiation induced nano-scale phase transition
Authors: Zhou, T.J.
Zhao, Y.
Wang, J.P. 
Thong, J.T.L. 
Chong, T.C. 
Issue Date: 15-May-2002
Citation: Zhou, T.J., Zhao, Y., Wang, J.P., Thong, J.T.L., Chong, T.C. (2002-05-15). Ferromagnetic nano-dot array fabricated by electron beam radiation induced nano-scale phase transition. Journal of Applied Physics 91 (10 I) : 6854-6856. ScholarBank@NUS Repository.
Abstract: We present a method of direct magnetic patterning of a nonmagnetic Co-C amorphous film by electron beam radiation induced nano-scale phase transition. Co-C alloy films with C concentration from 30 to 50 at% and thickness of 30-60 nm were prepared by alternately sputtering Co and C films onto C-buffered glass substrates. The films are amorphous and nonmagnetic with C concentration up to 40 at%. Due to their negative mixture entropy, as-deposited amorphous Co-C alloy films are metastable. Focused electron-beam irradiation causes localized phase segregation of the immiscible magnetic (Co-rich) and nonmagnetic (C-rich) phases. Ferromagnetic Co(C) nano-dot array was fabricated by subjecting the as-deposited Co 60C 40 films to electron beam radiation using a beam current of 16 nA, a beam energy of 20 keV and a dwell time of 5 s per dot. Magnetic force microscopy images and magnetic measurements confirm the formation of the ferromagnetic phase. The present single-step nanolithography eliminates the cumbersome traditional processes and is potentially a new and flexible alternative for fabricating patterned magnetic nanostructures for submicron magnetic devices. © 2002 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.1447523
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 17, 2019


checked on Mar 6, 2019

Page view(s)

checked on Jan 26, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.