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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/40216

Title: Reduced low frequency noise in electron beam evaporated MgO magnetic tunnel junctions
Author: FENG, JIA-FENG
KURT, HUSEYIN
COEY, JOHN MICHAEL DAVID
DIAO, ZHU
Sponsor: Science Foundation Ireland
Author's Homepage: http://people.tcd.ie/jcoey
http://people.tcd.ie/jfeng
http://people.tcd.ie/kurth
http://people.tcd.ie/diaoz
Keywords: MAGNETICS
MAGNETORESISTANCE
Issue Date: 2010
Citation: Diao, Z.; Feng, J. F.; Kurt, H.; Feng, G.; Coey, J. M. D., Reduced low frequency noise in electron beam evaporated MgO magnetic tunnel junctions, Applied Physics Letters, 96, 20, 2010, 202506
Series/Report no.: Applied Physics Letters
96
20
Abstract: We compare low frequency noise in magnetic tunnel junctions with MgO barriers prepared by electron-beam evaporation with those prepared by radiofrequency sputtering, both showing a high tunneling magnetoresistance. The normalized noise parameter in the parallel state of junctions with evaporated barriers is at least one order of magnitude lower than that in junctions with sputtered barriers, and exhibits a weaker bias dependence. The lowest normalized noise is in the 10(-11) mu m(2) range. A lower density of oxygen vacancies acting as charge trap states in the evaporated MgO is responsible for the lower noise.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/40216
Related links: http://dx.doi.org/10.1063/1.3431620
Appears in Collections:Physics (Scholarly Publications)

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