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Chumakov, A. I.; Niesen, L.; Nagy, D.L.; Alp, E.E.

doi:10.1023/a:1017028024642

Cited by 38 publications

(12 citation statements)

References 18 publications

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“…The authors concluded that the obtained picture quite well reproduced the theoretical predictions of [8][9][10], in particular it was shown that the spin-flopped region started from the top layer and was moved toward the center of the SL resulting in two antiphase domains. The similar complicated picture of the magnetization reorientation under the applied field was tested by PNR experiment in [11] for [Fe(4 nm)/Cr(1.1 nm)] 22 superlattice with cubic crystalline anisotropy. Measurements were performed under the applied fields 600, 200, 60 and 30 mT in order to probe the magnetisation depth-profile.…”

Section: Introductionmentioning

confidence: 76%

“…This last circumstance does not exist for the forward scattering and it provides us with the depth selective information relative the investigated parameters. The selectivity of the spectra measured at the different Bragg maxima to the depth distribution of hyperfine fields over one repetition period have been presented in [22] and thoroughly analyzed in [23]. In our case we are mostly interested in the magnetization profile in the whole ML.…”

Section: Theorymentioning

confidence: 99%

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Field-induced spin reorientation in[Fe/Cr]nmultilayers studied by nuclear resonance reflectivity

et al. 2015

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We present the depth-resolved nuclear resonance reflectivity (NRR) studies of the magnetization evolution in [ 57 Fe(3 nm)/Cr(1.2 nm)] 10 multilayer under the applied external field. The measurements have been performed at the station BL09XU of SPring-8 at different values of the external field (0 -1500 Oe). We apply the joint fit of the delayed reflectivity curves and the time spectra of the nuclear resonance reflectivity measured at different grazing angles for enhancement of the depth resolution and reliability of the results. For the first time we show that the azimuth angle, which is used in all papers devoted to the magnetization profile determination, has more complicated physical sense due to the partially coherent averaging of the scattering amplitudes from magnetic lateral domains. We describe the way how to select the true azimuth angle from the determined "effective azimuth angle". Finally we obtain the noncollinear twisted magnetization depth-profiles where the spin flop state appears sequentially in different 57 Fe layers at increasing applied field.

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Section: Introductionmentioning

confidence: 76%

Section: Theorymentioning

confidence: 99%

Field-induced spin reorientation in[Fe/Cr]nmultilayers studied by nuclear resonance reflectivity

et al. 2015

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“…In the early SR-based Mö ssbauer studies, grazing-incidence antireflection (GIAR) multilayer films were intensively studied with regard to the principle of nuclear resonant filtering of SR (Hannon et al, 1979(Hannon et al, , 1985aGerdau et al, 1990;Andreeva et al, 1991). Since then, a number of thin film and multilayer systems have been studied by the time-domain measurement (see, for example, Rö hlsberger et al, 1993;Chumakov et al, 1993Chumakov et al, , 1999Toellner et al, 1995;Niesen et al, 1998;Nagy et al, 1999Nagy et al, , 2000Rö hlsberger et al, 2001). The optical properties of a thin film containing a Mö ssbauer isotope and selected applications have been reviewed by Rö hlsberger (1999).…”

Section: Grazing-incidence Experiments With Circularly Polarized 57 Fementioning

confidence: 99%

⁵⁷Fe polarization-dependent synchrotron Mössbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator

Mitsui

Imai

Masuda

et al. 2015

J Synchrotron Radiat

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Energy-domain (57)Fe polarization-dependent synchrotron radiation Mössbauer spectroscopy was developed by using a diamond X-ray phase plate and an iron borate nuclear Bragg monochromator. The former controls the polarization of the incident synchrotron radiation X-rays and the latter filters the (57)Fe-Mössbauer radiation with a narrow bandwidth of ∼3.4 Γ0 (Γ0 ≃ 4.7 neV: natural linewidth of the (57)Fe nucleus) from the broadband synchrotron radiation. The developed nuclear diffraction optics allowed (57)Fe-Mössbauer studies to be performed with various polarization states, i.e. linear polarization, circular polarization and non-polarization. In this paper, the spectrometer system, beam characterization, performance-test experiments and a grazing-incidence Mössbauer measurement of an isotope-enriched ((57)Fe: 95%) iron thin film are described.

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“…parallel/antiparallel to the in-plane component of the wave vector, k , a condition for the appearance of the SMR specular AF reflection. 16 All SMR curves and maps were calculated for the 14. The theory presented above was implemented in, and specular and off-specular intensity curves and maps (both SMR and PNR) were simulated by the data evaluation computer program EFFI (Environment For FItting), which is freely downloadable.…”

Section: Model Calculations and Comparison With Experimentsmentioning

confidence: 99%

Perturbative theory of grazing-incidence diffuse nuclear resonant scattering of synchrotron radiation

et al. 2007

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Theoretical description of off-specular grazing-incidence nuclear resonant scattering of synchrotron radiation (Synchrotron Mössbauer Reflectometry, SMR) is presented. The recently developed SMR, similarly to polarized neutron reflectometry (PNR), is an analytical tool for the determination of isotopic and magnetic structure of thin films and multilayers. It combines the sensitivity of Mössbauer spectroscopy to hyperfine interactions and the depth selectivity of x-ray reflectometry. Specular reflection provides information on the depth profile, while off-specular scattering on the lateral structure of scattering layers. Off-specular SMR and PNR intensity formulae of a rather general multilayer with different domains, based on a Distorted Incident-Wave Approximation (DIWA) are presented. The Distorted-Wave Born Approximation (DWBA) results are given in an Appendix. Physical and numerical implications, why using DIWA, are explained.The temporal character of SMR imposes specific differences between SMR and PNR. In order to reveal the limits of DIWA and to compare the two analytical methods, two-dimensional diffuse SMR and PNR maps of an antiferromagnetic multilayer are calculated and critically compared.

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Cited by 38 publications

References 18 publications

Field-induced spin reorientation in[Fe/Cr]nmultilayers studied by nuclear resonance reflectivity

Field-induced spin reorientation in[Fe/Cr]nmultilayers studied by nuclear resonance reflectivity

⁵⁷Fe polarization-dependent synchrotron Mössbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator

Perturbative theory of grazing-incidence diffuse nuclear resonant scattering of synchrotron radiation

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Untitled

Cited by 38 publications

References 18 publications

Field-induced spin reorientation in[Fe/Cr]nmultilayers studied by nuclear resonance reflectivity

Field-induced spin reorientation in[Fe/Cr]nmultilayers studied by nuclear resonance reflectivity

57Fe polarization-dependent synchrotron Mössbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator

Perturbative theory of grazing-incidence diffuse nuclear resonant scattering of synchrotron radiation

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⁵⁷Fe polarization-dependent synchrotron Mössbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator