Long-range order on the atomic scale induced at CoFeB/MgO interfaces

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Publication Details

Output type: Journal article

Author list: Eilers G, Ulrichs H, Munzenberg M, Thomas A, Thiel K, Seibt M

Publisher: American Institute of Physics

Publication year: 2009

Journal: Journal of Applied Physics (0021-8979)

Volume number: 105

Issue number: 7

ISSN: 0021-8979

eISSN: 1089-7550

Languages: English-Great Britain (EN-GB)

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Open access status: closed

Abstract

The amorphous (a-) CoFeB/crystalline (c-) MgO based tunneling system interface has been studied by means of quantitative high resolution transmission electron microscopy from atomic to micrometer length scales with increasing annealing temperatures. On the micron scale an irregular nucleation is found. On the atomic scale a long-range order is induced by the MgO interface, explaining the high tunnel magnetoresistance values > 100% even for not fully crystallized CoFeB/MgO/CoFeB tunnel junctions. (C) 2009 American Institute of Physics. [DOI:10.1063/1.3100044]

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