scholarly journals Spatial Distribution of Magnetic and Nonmagnetic Phases in Nuclear Forward Scattering of Synchrotron Radiation

1998 ◽  
Vol 51 (2) ◽  
pp. 453 ◽  
Author(s):  
H. F. Grünsteudel ◽  
H.-J. Hesse ◽  
R. Rüffer ◽  
G. Wortmann ◽  
A. I. Chumakov ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Synchrotron Radiation ◽  
Domain Structure ◽  
Forward Scattering ◽  
Nuclear Forward Scattering

Nuclear forward scattering of synchrotron radiation has been demonstrated to permit conclusions on the spatial distribution of scattering centres. An outline of the method is given and implications for samples exhibiting domain structure are discussed.

Identification of spatial magnetic inhomogeneities by nuclear forward scattering of synchrotron radiation

2019 ◽  
Vol 26 (4) ◽  
pp. 1310-1315
Author(s):  
Vlastimil Vrba ◽  
Vít Procházka ◽  
Marcel Miglierini
Keyword(s):  
Spatial Distribution ◽  
Magnetic Moments ◽  
Theoretical Description ◽  
Forward Scattering ◽  
Point Of View ◽  
Experimental Point ◽  
Nuclear Forward Scattering ◽  
Magnetic Inhomogeneities ◽  
Geometric Arrangements ◽  
Scattering Time

Spatially confined magnetic inhomogeneities were revealed by measuring nuclear forward scattering time spectra on the same sample in two different geometric arrangements. They differ by 180° rotation of the sample around one of the polarization axes. A basic theoretical description of this phenomenon and its relation to a spatial distribution of nuclei featuring different magnetic moments is provided. From an experimental point of view, the violation of rotational invariance was observed for an inhomogeneous Fe81Mo8Cu1B10 metallic glass. The development of magnetic inhomogeneities and their relation to the evolution of time spectra was studied during thermal annealing.

scholarly journals On the Formation of Nanocrystalline Grains in Metallic Glasses by Means of In-Situ Nuclear Forward Scattering of Synchrotron Radiation

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 544 ◽  
Author(s):  
David Smrčka ◽  
Vít Procházka ◽  
Vlastimil Vrba ◽  
Marcel Miglierini
Keyword(s):  
Magnetic Field ◽  
Synchrotron Radiation ◽  
External Magnetic Field ◽  
Metallic Glasses ◽  
Hyperfine Interactions ◽  
Transformation Process ◽  
Forward Scattering ◽  
Point Of View ◽  
Nuclear Forward Scattering

Application of the so-called nuclear forward scattering (NFS) of synchrotron radiation is presented for the study of crystallization of metallic glasses. In this process, nanocrystalline alloys are formed. Using NFS, the transformation process can be directly observed during in-situ temperature experiments not only from the structural point of view, i.e., formation of nanocrystalline grains, but one can also observe evolution of the corresponding hyperfine interactions. In doing so, we have revealed the influence of external magnetic field on the crystallization process. The applied magnetic field is not only responsible for an increase of hyperfine magnetic fields within the newly formed nanograins but also the corresponding components in the NFS time spectra are better identified via occurrence of quantum beats with higher frequencies. In order to distinguish between these two effects, simulated and experimental NFS time spectra obtained during in-situ temperature measurements with and without external magnetic field are compared.

57Fe nuclear forward scattering of synchrotron radiation in hedenbergite CaFeSi2O6at hydrostatic pressures up to 68 GPa

1999 ◽  
Vol 84 (3) ◽  
pp. 447-453 ◽  
Author(s):  
L. Zhang ◽  
J. Stanek ◽  
S. S. Hafner ◽  
H. Ahsbahs ◽  
H. F. Gruensteudel ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Forward Scattering ◽  
Nuclear Forward Scattering

Direct evidence of Fe(v) and Fe(iv) intermediates during reduction of Fe(vi) to Fe(iii): a nuclear forward scattering of synchrotron radiation approach

2015 ◽  
Vol 17 (34) ◽  
pp. 21787-21790 ◽  
Author(s):  
Libor Machala ◽  
Vít Procházka ◽  
Marcel Miglierini ◽  
Virender K. Sharma ◽  
Zdeněk Marušák ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Direct Evidence ◽  
Forward Scattering ◽  
Nuclear Forward Scattering ◽  
Iron Species ◽  
High Valent

Identification of unstable high-valent iron species in decomposition of ferrate(vi) advances the understanding of mechanisms by ferrates.

Nuclear forward scattering of synchrotron radiation by deoxymyoglobin

2000 ◽  
Vol 29 (2) ◽  
pp. 146-152 ◽  
Author(s):  
C. Keppler ◽  
K. Achterhold ◽  
A. Ostermann ◽  
U. van Bürck ◽  
A. I. Chumakov ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Forward Scattering ◽  
Nuclear Forward Scattering

Time Domain Study of57Fe Diffusion using Nuclear Forward Scattering of Synchrotron Radiation

1996 ◽  
Vol 76 (17) ◽  
pp. 3220-3223 ◽  
Author(s):  
B. Sepiol ◽  
A. Meyer ◽  
G. Vogl ◽  
R. Rüffer ◽  
A. I. Chumakov ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Time Domain ◽  
Forward Scattering ◽  
Nuclear Forward Scattering
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