Magnetic off-specular neutron scattering from Fe/Cr multilayers

Lauter-Pasyuk, V.; Läuter, H.; Toperverg, B. P.; Nikonov, O.; Кравцов, Е. А.; Milyaev, M. A.; Romashev, L. N.; Ustinov, V. V.

doi:10.1016/s0921-4526(99)01938-9

Cited by 29 publications

(17 citation statements)

References 8 publications

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“…For a good interpretation of the measured data it is therefore important to measure both specular and off-specular signals. 13,32,33 …”

Section: A Spatial Coherence Of the Beammentioning

confidence: 99%

“…30,31 At grazing incidence, the lengths obtained by projecting the coherence volume of the neutron beam on the sample surface may become rather large ͑up to the mm range͒ but usually remain smaller than the sample surface and therefore have to be compared with the lengths of lateral correlations present in the sample. This can have important consequences for the interpretation and simulation of specular reflectivity 20 and off-specular scattering, 13,32,33 as explained in Sec. II A.…”

Section: Introductionmentioning

confidence: 99%

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Depth-resolved investigation of the lateral magnetic correlations in a gradient nanocrystalline multilayer

et al. 2008

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We present an investigation of the structural and magnetic correlations during the remagnetization process of a gradient nanocrystalline multilayer with uniform uniaxial magnetic anisotropy by specular reflectometry and off-specular scattering of polarized neutrons with polarization analysis. The scattering data were analyzed within the distorted wave Born approximation ͑DWBA͒ including interfacial roughness correlations and lateral correlations of the spin misalignment. The magnetization reversal proceeds sequentially from the bottommost and thinnest ferromagnetic layers to the topmost and thickest ones. It is quantitatively explained within the random anisotropy model including dominant uniform uniaxial anisotropy. Two types of lateral spin misalignment were deduced, random and not random: The first one in all layers due to the random orientation of the grains, the second one in the layers with nonreversed magnetizations only and due to the applied field acting against the uniaxial anisotropy.

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“…For a good interpretation of the measured data it is therefore important to measure both specular and off-specular signals. 13,32,33 …”

Section: A Spatial Coherence Of the Beammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Depth-resolved investigation of the lateral magnetic correlations in a gradient nanocrystalline multilayer

et al. 2008

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“…[10]) by a theoretical model. However, in this case a possible contamination of the specular intensity by diffuse scattering, which is often seen from exchange coupled ML [11,12], should be accounted for. Then a complete evaluation [11] of the data is required, while valuable information such as the mean angle between sublattice magnetization and external field [13,14] can be obtained analyzing some particular features of offspecular scattering.…”

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confidence: 99%

Transverse and Lateral Structure of the Spin-Flop Phase inFe/CrAntiferromagnetic Superlattices

et al. 2002

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Direct evidence of the nonuniformly canted state of the spin-flop phase induced by a magnetic field applied to Fe/Cr(100) superlattices is obtained by polarized neutron reflectometry. It is unambiguously demonstrated that the magnetization of the alternating Fe layers is twisted through the multilayer stack proving a stable noncollinear configuration. The maximal tilt at the end layers progressively reduces towards the center of the multilayer. The set of tilt angles is deduced from a model-free data evaluation employing the supermatrix routine. Spin-flip off-specular scattering is determined by the in-plane magnetization fluctuations and is fitted by a theoretical model of domains.

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“…Domain-size-dependent resistance noise, for example, may be as large as to limit GMR-sensor applications [21]. Therefore, indirect methods like resistance noise [21] and magnetoresistance [24] measurements, off-specular non-polarised [25] and polarised neutron reflectometry [26,27] and, recently, soft-X-ray resonant magnetic diffuse scattering [28] have been used to estimate the AF-domain-size distribution in magnetic MLs. In fact, Kerr-microscopy has been performed so far only on thick trilayers [22,23].…”

Section: Direction Of the Layer Magnetisation In Coupled Multilayersmentioning

confidence: 99%

Specular and Off-Specular Synchrotron M�ssbauer Reflectometry: Applications to Thin Film Magnetism

Nagy

Bottyán

Deák

et al. 2002

phys. stat. sol. (a)

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Synchrotron Mö ssbauer Reflectometry (SMR) is a novel tool for studying the magnetic structure of multilayers. The orientation of the layer magnetisation in an antiferromagnetically coupled multilayer is determined from the intensity of the pure nuclear reflection in specular time-integral SMR experiments. The value of the saturation field is estimated with high accuracy. The bulk spinflop transition in an Fe/Cr superlattice of fourfold in-plane magnetocrystalline anisotropy is demonstrated. The width of the off-specular (diffuse) scattering peak is a measure of the in-plane antiferromagnetic domain size. The domain correlation length of 2.6 mm measured in remanence on the Fe/Cr superlattice following magnetic saturation is in good agreement with semi-empirical model calculations. D. L. Nagy et al.: Specular and Off-Specular Synchrotron Mö ssbauer Reflectometry Fig. 2. Normalised intensity of the AF peak of a MgO(001)/[ 57 Fe(26 A)/Cr(13 A)] 20 multilayer vs. magnetic field H perpendicular to the photon beam during bulk spin-flop. The continuous line is guiding the eyes. The inset shows the MOKE angle vs. magnetic field

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Magnetic off-specular neutron scattering from Fe/Cr multilayers

Cited by 29 publications

References 8 publications

Depth-resolved investigation of the lateral magnetic correlations in a gradient nanocrystalline multilayer

Depth-resolved investigation of the lateral magnetic correlations in a gradient nanocrystalline multilayer

Transverse and Lateral Structure of the Spin-Flop Phase inFe/CrAntiferromagnetic Superlattices

Specular and Off-Specular Synchrotron M�ssbauer Reflectometry: Applications to Thin Film Magnetism

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