Spin-dependent Mn<i>K</i>-edge XANES of MnO and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">MnF</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: Full multiple-scattering analysis

Soldatov, A. V.; Ivanchenko, T. S.; Kovtun, Alessandro; Longa, Stefano Della; Bianconi, A.

doi:10.1103/physrevb.52.11757

Cited by 31 publications

(28 citation statements)

References 36 publications

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“…9a that the non-vanishing intensity apparent in the Kβ′ excitation spectrum is due to the diagonal component, which originates from the main peak of the Kβ1,3 ridge. It should also be mentioned that major features of the obtained dg1s/dw's well correspond to those in the calculated spectra by Soldatov et al 38 These observations demonstrate that the analyses in terms of Eq. (4) are crucially important for correctly determining the spin-selective XAFS.…”

Section: ·1 Lbs Spin-selective Xafssupporting

confidence: 67%

Lifetime-Broadening-Suppressed Selective XAFS Spectroscopy

Hayashi

2008

ANAL. SCI.

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Every element has its characteristic absorption edge in the x-ray region, and x-ray absorption fine structure (XAFS) appears at the high-energy side. XAFS is sensitive to local electronic states and atomic environments around the absorbing atoms, and hence has been extensively employed over wide research fields as an element-specific characterization method. 1-3 XAFS spectroscopy is, however, not free from problems. One of them is that the natural widths (a few eV 4 in ordinary experiments) that originate from the finite lifetime of core holes determine the resolution of XAFS spectra.Lifetime-broadening often prevents detailed analyses, particularly, for the pre-edge region. 5 Another problem is that conventional XAFS does not have state selectivity, and therefore chemical state information is averaged, whereas in many instances, e.g. heterogeneous catalyst studies, it is of vital importance to selectively probe different forms of the elements.It is possible to circumvent these intrinsic shortcomings of XAFS spectroscopy by making use of resonant inelastic x-ray scattering (RIXS). [5][6][7][8][9][10][11][12] Here we loosely define RIXS as x-ray emissions excited with x-ray energies near an absorption edge. 6,7 Wide applications of RIXS have been so far hindered by its low intensity.However, the intensity problem in RIXS measurements is now being solved by developing highly sensitive emission spectrometers with high resolution, optimized for the use at third-generation synchrotron sources. [12][13][14][15] In the present review, we survey this novel technique, lifetimebroadening-suppressed (LBS) selective XAFS spectroscopy, while paying attention to basic aspects. Lifetime-broadening-suppressed XAFS and Resonant Inelastic X-ray ScatteringPioneer work to overcome the resolution limitation of XAFS has been made by Hämäläinen et al. at 1991. 5 They proposed partial fluorescent yield (PFY) spectroscopy to obtain LBS-XAFS, where highly monochromatic incident x-ray energy is scanned across an absorption edge while monitoring the characteristic x-rays with better resolution than the natural width. However, it was later suggested that PFY spectra cannot be viewed as genuine LBS-XAFS 16,17 (although for wide-band materials, where core-electron interactions are small, they can be a good approximation to LBS-XAFS). 6,16,18 Partially because of this indication, there were very few reports on succeeding PFY measurements. 19 An alternative method to obtain LBS-XAFS by using RIXS has been theoretically suggested by Tulkki and Åberg, 20 even before the proposition of the PFY spectroscopy (at 1982). They have stated that "the shape of the spectrum of the scattered photons may be used to disentangle bound-state excitations from continuous absorption more effectively than in ordinary Chemical and Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo, Japan **PRESTO, Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Japan Lifetime-broadening-suppressed (LBS) state-selective XAFS spectra can be dedu...

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Section: ·1 Lbs Spin-selective Xafssupporting

confidence: 67%

Lifetime-Broadening-Suppressed Selective XAFS Spectroscopy

Hayashi

2008

ANAL. SCI.

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“…But the complex interference effects of the photoelectron wave (as in the case of Mn XANES [18,191) can also be one of the reasons of the present case. In fact in a recent study of solid Ne where the interatomic distance is even larger we have found a large multiple scattering contribution in the K-edge XANES of neon [23].…”

Section: Discussionmentioning

confidence: 72%

On the Role of High‐Order Multiple Scattering Terms in Br K‐Edge XANES of the Ionic Conductor AgBr

Soldatov

Ivanchenko²,

Longa

et al. 1993

Physica Status Solidi (b)

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The role of the multiple scattering terms in the Br K-edge X-ray absorption near edge structure(XANES) spectrum of AgBr is studied. In this system, in spite of the arrangement of atoms in collinear geometry, the first term in the expansion of the absorption coefficient (the single-scattering term) is shown to account for the main features of the experimental spectrum in the range of 80 eV above the absorption threshold. The role of both the large Br-Ag distance 0.289 nm and the short core hole lifetime in reducing the amplitude of multiple scattering terms is discussed. The size of the cluster of neighbor atoms probed by the XANES spectrum is studied: the second shell consisting of twelve Br atoms is shown to give the main contribution to the observed experimental features showing the minor role of the first coordination shell. I ) Sorge str. 5, 344104 Rostov on Don, Russia. ') On leave from the Department of Solid State Physics, Rostov Unversity, Russia.

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“…1s 2 2p 5 3d 5 ep. Hayashi [4]. Their result shows that the multiplescattering calculations are promising, however, no detailed analysis of the magnetic structures is not undertaken.…”

Section: Introductionmentioning

confidence: 90%