scholarly journals Nanocrystallization of Metallic Glasses Followed by in situ Nuclear Forward Scattering of Synchrotron Radiation

Author(s):  
Marcel B. Miglierini ◽  
Vít Procházka
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.


2015 ◽  
Vol 17 (42) ◽  
pp. 28239-28249 ◽  
Author(s):  
Marcel Miglierini ◽  
Márius Pavlovič ◽  
Vít Procházka ◽  
Tomáš Hatala ◽  
Gerhard Schumacher ◽  
...  

In situ transformation of local structure and hyperfine interactions are simultaneously followed in real time during temperature annealing of metallic glasses.


2020 ◽  
Vol 91 (7) ◽  
pp. 073901
Author(s):  
Jiri Orava ◽  
Konrad Kosiba ◽  
Xiaoliang Han ◽  
Ivan Soldatov ◽  
Olof Gutowski ◽  
...  

1998 ◽  
Vol 51 (2) ◽  
pp. 453 ◽  
Author(s):  
H. F. Grünsteudel ◽  
H.-J. Hesse ◽  
R. Rüffer ◽  
G. Wortmann ◽  
A. I. Chumakov ◽  
...  

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.


2016 ◽  
Author(s):  
Vlastimil Vrba ◽  
Vít Procházka ◽  
David Smrčka ◽  
Marcel Miglierini

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

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