Element-specific study of the anomalous magnetic interlayer coupling across NiO spacer layer in Co/NiO/Fe/Ag(001) using XMCD and XMLD

Title
Element-specific study of the anomalous magnetic interlayer coupling across NiO spacer layer in Co/NiO/Fe/Ag(001) using XMCD and XMLD
Authors
Jie Wu최준우Andreas SchollAndrew DoranElke ArenholzYizheng Wu원창연황찬용Zi Qiang Qiu
Keywords
Interlayer Coupling; XMCD; XMLD; NiO
Issue Date
2009-07
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 80, NO 1, 012409-1-012409-4
Abstract
Co/NiO/Fe trilayers are grown on Ag 001 substrate using molecular-beam epitaxy and investigated by element-specific magnetic domain images using x-ray magnetic circular dichroism and x-ray magnetic linear dichroism techniques. By comparing the Co, Fe, and NiO magnetic domain images, we identify that the anomalous Co-Fe interlayer coupling from a 90° coupling to a collinear coupling with increasing the NiO film thickness is due to a transition from a collinear to 90° coupling at the NiO/Fe interface while retaining a 90° coupling at the Co/NiO interface. Uncompensated Ni spins are found at the Co/NiO interface but are absent at the NiO/Fe interface. No evidence of spiral NiO spin structure is found in this Co/NiO/Fe sandwich.
URI
http://pubs.kist.re.kr/handle/201004/38717
ISSN
1098-0121
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KIST Publication > Article
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