nuclear forward scattering
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2021 ◽  
pp. 127652
Author(s):  
F. Lindroos ◽  
J.M.K. Slotte ◽  
J. Lindén ◽  
A.I. Chumakov ◽  
P. Karen




2020 ◽  
Vol 101 (9) ◽  
Author(s):  
Yu. V. Knyazev ◽  
A. I. Chumakov ◽  
A. A.  Dubrovskiy ◽  
S. V.  Semenov ◽  
I.  Sergueev ◽  
...  




2019 ◽  
Vol 123 (38) ◽  
pp. 23628-23634 ◽  
Author(s):  
Alexey V. Sobolev ◽  
Iana S. Glazkova ◽  
Alena A. Akulenko ◽  
Ilya Sergueev ◽  
Alexandr I. Chumakov ◽  
...  


2019 ◽  
Vol 793 ◽  
pp. 672-677
Author(s):  
D. Smrčka ◽  
V. Procházka ◽  
V. Vrba ◽  
M. Miglierini


2019 ◽  
Vol 26 (4) ◽  
pp. 1310-1315
Author(s):  
Vlastimil Vrba ◽  
Vít Procházka ◽  
Marcel Miglierini

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.



Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 544 ◽  
Author(s):  
David Smrčka ◽  
Vít Procházka ◽  
Vlastimil Vrba ◽  
Marcel Miglierini

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.





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