Magneto-optical study of exchange spring degradation

Citation
Vk. Vlasko-vlasov et al., Magneto-optical study of exchange spring degradation, IEEE MAGNET, 37(4), 2001, pp. 2424-2427
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
00189464 → ACNP
Volume
37
Issue
4
Year of publication
2001
Part
1
Pages
2424 - 2427
Database
ISI
SICI code
0018-9464(200107)37:4<2424:MSOESD>2.0.ZU;2-0
Abstract
Magnetic structures of SmCo/Fe bilayers during remagnetization and after mu ltiple field cycling are studied magneto-optically (MO). Rotation of the re manent magnetization in the soft Fe layer away from the easy axis is found after large enough remagnetizing fields. This is indicative of the appearan ce of biquadratic coupling between the layers. It is explained by the fluct uation exchange mechanism due to the field induced magnetic inhomogeneity o f the hard layer. Such an inhomogeneity revealed in the MO patterns also ex plains the degradation of the bias field in exchange springs.