Effects of surface magnetism on optical second harmonic generation

Reif, J.; Zink, J. C.; Schneider, C. M.; Kirschner, J.

doi:10.1103/physrevlett.67.2878

Cited by 228 publications

(145 citation statements)

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“…Recent developments using stroboscopic magneto-optic techniques achieved high time resolution 6,7,8,9 , thus enabling the study of the magnetization dynamics on a picosecond-time scale. Using second harmonic generation in MOKE measurements results in a high sensitivity to the magnetization at the interfaces between different materials 10,11,12,13,14 .…”

Section: Introductionmentioning

confidence: 99%

Separation of the first- and second-order contributions in magneto-optic Kerr effect magnetometry of epitaxial FeMn/NiFe bilayers

Mewes

Nembach

Rickart

et al. 2004

Journal of Applied Physics

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The influence of second-order magneto-optic effects on Kerr effect magnetometry of epitaxial exchange coupled Fe50Mn50 /Ni81Fe19 -bilayers is investigated. A procedure for separation of the first-and second-order contributions is presented. The full angular dependence of both contributions during the magnetization reversal is extracted from the experimental data and presented using gray scaled magnetization reversal diagrams. The theoretical description of the investigated system is based on an extended Stoner-Wohlfarth model, which includes an induced unidirectional and fourfold anisotropy in the ferromagnet, caused by the coupling to the antiferromagnet. The agreement between the experimental data and the theoretical model for both the first-and second-order contributions are good, although a coherent reversal of the magnetization is assumed in the model.

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Section: Introductionmentioning

confidence: 99%

Separation of the first- and second-order contributions in magneto-optic Kerr effect magnetometry of epitaxial FeMn/NiFe bilayers

Mewes

Nembach

Rickart

et al. 2004

Journal of Applied Physics

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“…It was realised that magnetization, as an axial vector, did not lift the inversion symmetry of the bulk, allowing magnetic surfaces and interfaces to be probed [8,9]. The first experimental results soon appeared [10] and, with the development of reliable femtosecond lasers, MSHG surface and interface studies became relatively straightforward, due to the improvement in the signal-to-noise ratio (SNR).…”

Section: Introductionmentioning

confidence: 99%

Magnetic second-harmonic generation from interfaces and nanostructures

McGilp

Carroll

Fleischer

et al. 2010

Journal of Magnetism and Magnetic Materials

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Magneto-optic techniques provide non-contact and non-destructive characterization of magnetic materials. This includes embedded magnetic nanostructures, which are accessible due to the large penetration depth of optical radiation. The linear magneto-optic Kerr effect is widely used in the growth and characterization of ultra-thin magnetic films and can show monolayer sensitivity. Nonlinear magnetic second-harmonic generation (MSHG) is a more difficult and expensive technique but, uniquely, can measure the surface and interface magnetism of centrosymmetric magnetic films with sub-monolayer sensitivity. MSHG is briefly reviewed and examples from high symmetry interfaces and nanostructures described. Low symmetry structures are more difficult to characterize, however, because of the large number of tensor components that may contribute to the signal. An important class of low symmetry systems exploits vicinal substrates to grow aligned magnetic nanostructures by self-organization. These structures have a high proportion of magnetic step or edge atoms relative to the terrace atoms, and the overall magnetic response is expected to contain significant contributions from these different magnetic regions. It is shown that contributions from these different regions can be identified using normal A c c e p t e d m a n u s c r i p t -2 -incidence (NI) MSHG. This new approach is used to determine hysteresis loops from Au-capped Fe monolayers grown on a vicinal W(110) substrate. Temperature-dependent studies of the MSHG contrast also allow Curie temperatures to be determined. This experimental procedure and phenomenology opens up low symmetry magnetic interfaces and aligned nanostructures to characterization by MSHG.

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“…[4][5][6] These effects are due to the simultaneous breaking of inversion symmetry ͑at interfaces͒ and time-reversal symmetry 7 ͑by the magnetization͒.…”

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confidence: 99%