Determination of hyperfine fields and atomic ordering in NiMnFeGe exhibiting martensitic transformation

• Authors: Dariusz Satuła , Krzysztof Szymański , Katarzyna Rećko , Wojciech Olszewski , Beata Kalska-Szostko
• Languages of publication: EN

Abstracts

EN

The hyperfine fields and atomic ordering in Ni1−xFexMnGe (x = 0.1, 0.2, 0.3) alloys were investigated using X-ray diffraction and Mössbauer spectroscopy at room temperature. The X-ray diffraction measurements show that the samples with x = 0.2, 0.3 crystallized in the hexagonal Ni2In-type of structure, whereas in the sample with x = 0.1, the coexistence of two phases, Ni2In- and orthorhombic TiNiSi-type of structures, were found. The Mössbauer spectra measured with x = 0.2, 0.3 show three doublets with different values of isomer shift (IS) and quadrupole splitting (QS) related to three different local surroundings of Fe atoms in the hexagonal Ni2In-type structure. It was shown that Fe atoms in the hexagonal Ni2In-type structure of as-cast Ni1−xFexMnGe alloys are preferentially located in Ni sites and small amount of Fe is located in Mn and probably in Ge sites. The spectrum for x = 0.1 shows the doublets in the central part of spectrum and a broad sextet. The doublets originate from the Fe atoms in the paramagnetic state of hexagonal Ni2In-type structure, whereas the sextet results from the Fe atoms in orthorhombic TiNiSi-type structure.

Keywords

EN

X-ray diffraction; Mössbauer spectroscopy; martensitic transition; atomic ordering

• Publisher: De Gruyter Open
• Journal: Nukleonika
• Year: 2015
• Volume: 60
• Issue: 1
• Pages: 127-131

Dates

published

1 - 3 - 2015

online

12 - 3 - 2015

accepted

17 - 11 - 2014

received

18 - 6 - 2014

Contributors

author

Dariusz Satuła

• Faculty of Physics, University of Bialystok, 1L K. Ciołkowskiego Str., 15-245 Białystok, Poland, Tel.: [phone], Fax: [phone]

author

Krzysztof Szymański

• Faculty of Physics, University of Bialystok, 1L K. Ciołkowskiego Str., 15-245 Białystok, Poland, Tel.: [phone], Fax: [phone]

author

Katarzyna Rećko

• Faculty of Physics, University of Bialystok, 1L K. Ciołkowskiego Str., 15-245 Białystok, Poland, Tel.: [phone], Fax: [phone]

author

Wojciech Olszewski

• Faculty of Physics, University of Bialystok, 1L K. Ciołkowskiego Str., 15-245 Białystok, Poland and ALBA Synchrotron Light Source, Crta. BP 1413, Km. 3.3, 08290 Cerdanyola del Vallès, Barcelona, Spain

author

Beata Kalska-Szostko

• Institute of Chemistry, University of Bialystok, 1 Hurtowa Str., 15-399 Białystok, Poland

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Identifiers

DOI

10.1515/nuka-2015-0026