In-depth resolution of the magneto-optical Kerr effect in ferromagnetic multilayers -: art. no. 224423

被引:66
作者
Hamrle, J [1 ]
Ferré, J
Nyvlt, M
Visnovsky, S
机构
[1] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France
[2] Charles Univ, Inst Phys, CZ-12116 Prague 2, Czech Republic
来源
PHYSICAL REVIEW B | 2002年 / 66卷 / 22期
关键词
D O I
10.1103/PhysRevB.66.224423
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
How does one determine the magnetization state and hysteresis loop corresponding to one of the ferromagnetic (FM) layers located at a given depth in a stack of FM/non-FM layers by means of the magneto-optical Kerr effect? For this purpose the representation of the Kerr effect in the complex rotation-ellipticity plane is introduced. A depth sensitivity function controlling the Kerr effect is defined and its dependence on the photon energy and angle of incidence is studied. A general way to determine the in-depth location of the FM layer, from which the Kerr signal originates, is proposed. In the case of a FM bilayer structure, previous proposed solutions are discussed within a unified formalism. For a system with three or more FM layers two approaches are proposed to extract selectively the magneto-optical signals originating at individual FM layers: the parallel Kerr vector and cascade numerical projection methods. These methods are successively checked experimentally on simple multilayer structures. Finally, on the basis of the developed approaches a readout solution for multivalued magneto-optical recording in a four-storage-layer structure is proposed.
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页码:1 / 16
页数:16
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