Perpendicular magnetic anisotropy caused by interfacial hybridization via enhanced orbital moment in Co/Pt multilayers: Magnetic circular x-ray dichroism study

Authors
Nakajima, N Koide, T Shidara, T Miyauchi, H Fukutani, I Fujimori, A Iio, K Katayama, T Nyvlt, M Suzuki, Y
Citation
N. Nakajima et al., Perpendicular magnetic anisotropy caused by interfacial hybridization via enhanced orbital moment in Co/Pt multilayers: Magnetic circular x-ray dichroism study, PHYS REV L, 81(23), 1998, pp. 5229-5232
Citations number
35
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
81
Issue
23
Year of publication
1998
Pages
5229 - 5232
Database
ISI
SICI code
0031-9007(199812)81:23<5229:PMACBI>2.0.ZU;2-I
Abstract
Magnetic circular x-ray dichroism (MCXD) measurements-at the Co L-2,L-3 and M-2,M-3 core edges reveal a strongly enhanced perpendicular Co orbital mom ent (m(orb)) in Co/Pt multilayers which show perpendicular magnetic anisotr opy (PMA). MCXD signals at the Pt N-6,N-7 and O-2,O-3 edges, arising from P t 5d-Co 3d hybridization, persist for the thinnest Co layer. The hybridizat ion is shown to be localized at the Co/Pt interface and to cause the m(orb) enhancement which drives PMA. Unambiguous evidence for a transition from f ee to hcp Co is presented and m(orb) of bulk fee Co has been determined to be 0.11 mu(B) for the first time.