The antiphase boundary in half-metallic Heusler alloy Co2Fe(Al,Si): atomic structure, spin polarization reversal, and domain wall effects
Atomic resolution scanning transmission electron microscopy reveals the presence of an antiphase boundary in the half-metallic Co2Fe(Al,Si) full Heusler alloy. By employing the density functional theory calculations, we show that this defect leads to reversal of the sign of the spin-polarization in...
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Published in | Applied physics letters Vol. 109; no. 22 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
28.11.2016
|
Online Access | Get full text |
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Summary: | Atomic resolution scanning transmission electron microscopy reveals the presence of an
antiphase boundary in the half-metallic Co2Fe(Al,Si) full Heusler alloy. By
employing the density functional
theory calculations, we show that this defect leads to reversal of the
sign of the spin-polarization in the vicinity of the defect. In addition, we show that
this defect reduces the strength of the exchange interactions, without changing the ferromagnetic ordering across
the boundary. Atomistic spin calculations predict that this effect reduces the width of
the magnetic domain
wall compared to that in the bulk. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.4971281 |