<abstract xmlns="http://www.w3.org/1999/xhtml">The hyperfine fields and atomic ordering in Ni1−<italic>x</italic>Fe<italic>x</italic>MnGe (<italic>x</italic> = 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 <italic>x</italic> = 0.2, 0.3 crystallized in the hexagonal Ni2In-type of structure, whereas in the sample with <italic>x</italic> = 0.1, the coexistence of two phases, Ni2In- and orthorhombic TiNiSi-type of structures, were found. The Mössbauer spectra measured with <italic>x</italic> = 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−<italic>x</italic>Fe<italic>x</italic>MnGe alloys are preferentially located in Ni sites and small amount of Fe is located in Mn and probably in Ge sites. The spectrum for <italic>x</italic> = 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.</abstract>

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.

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

Faculty of Physics, University of Bialystok, 1L K. Ciołkowskiego Str., 15-245 Białystok, Poland, Tel.: +48 85 738 8167, Fax: +48 85 745 7223

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

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

Nukleonika

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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...

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

Published Online: Mar 12, 2015

Page range: 127 - 131

Received: Jun 18, 2014

Accepted: Nov 17, 2014

DOI: https://doi.org/10.1515/nuka-2015-0026

Keywords
X-ray diffraction, Mössbauer spectroscopy, martensitic transition, atomic ordering

© Dariusz Satuła, Krzysztof Szymański, Katarzyna Rećko, Wojciech Olszewski, Beata Kalska-Szostko

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

Published Online: Mar 12, 2015

Page range: 127 - 131

Received: Jun 18, 2014

Accepted: Nov 17, 2014

DOI: https://doi.org/10.1515/nuka-2015-0026

KeywordsX-ray diffraction, Mössbauer spectroscopy, martensitic transition, atomic ordering

© Dariusz Satuła, Krzysztof Szymański, Katarzyna Rećko, Wojciech Olszewski, Beata Kalska-Szostko

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
X-ray diffraction, Mössbauer spectroscopy, martensitic transition, atomic ordering