Distinct Universality Classes of Domain Wall Roughness in Two-Dimensional Pt/Co/Pt Films

Title
Distinct Universality Classes of Domain Wall Roughness in Two-Dimensional Pt/Co/Pt Films
Authors
문경웅김덕호유상철조정구황성민강병남민병철신경호최석봉
Issue Date
2013-03
Publisher
Physical review letters
Citation
VOL 110, NO 10, 107203-1-107203-5
Abstract
We demonstrate here that the current-driven domain wall (DW) in two dimensions forms a ‘‘facet’’ roughness, distinctive to the conventional self-affine roughness induced by a magnetic field. Despite the different universality classes of these roughnesses, both the current- and field-driven DW speed follow the same creep law only with opposite angular dependences. Such angular dependences result in a stable facet angle, from which a single DWimage can unambiguously quantify the spin-transfer torque efficiency, an essential parameter in DW-mediated nanodevices.
URI
http://pubs.kist.re.kr/handle/201004/44596
ISSN
00319007
Appears in Collections:
KIST Publication > Article
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