<abstract xmlns="http://www.w3.org/1999/xhtml">The materials studied were polycrystalline compounds Er2−<italic>x</italic>Tb<italic>x</italic>Fe14B (<italic>x</italic> = 0.1, 0.2, 0.3, 0.4) which crystallize in a tetragonal lattice and display a variety of spin arrangements. The compounds have been measured with 57Fe Mössbauer spectroscopy over the temperature range 80–320 K in order to investigate the spin reorientation processes. Each compound was studied in a wide temperature range, with precise Mössbauer scanning in the vicinity of the transition. The set of spectra obtained for a given compound was analyzed using simultaneous fitting procedure to investigate the influence of the transition on the shape of the spectra. The fitting program was specified to analyze the transition according to the ‘two state model’: spins flip abruptly from initial angle to final arrangement (90° angle). Obtained results suggest that spin reorientation process cannot be described using only the mentioned above model. Additional computer simulations based on the Yamada–Kato model were conducted to determine temperature range and the type of spin alignments in the vicinity of the transition. These theoretical results supported by spectra analysis suggest the existence of intermediate (canted) spin arrangements in the studied compounds. The spin arrangement diagram was constructed.</abstract>

The materials studied were polycrystalline compounds Er2−xTbxFe14B (x = 0.1, 0.2, 0.3, 0.4) which crystallize in a tetragonal lattice and display a variety of spin arrangements. The compounds have been measured with 57Fe Mössbauer spectroscopy over the temperature range 80–320 K in order to investigate the spin reorientation processes. Each compound was studied in a wide temperature range, with precise Mössbauer scanning in the vicinity of the transition. The set of spectra obtained for a given compound was analyzed using simultaneous fitting procedure to investigate the influence of the transition on the shape of the spectra. The fitting program was specified to analyze the transition according to the ‘two state model’: spins flip abruptly from initial angle to final arrangement (90° angle). Obtained results suggest that spin reorientation process cannot be described using only the mentioned above model. Additional computer simulations based on the Yamada–Kato model were conducted to determine temperature range and the type of spin alignments in the vicinity of the transition. These theoretical results supported by spectra analysis suggest the existence of intermediate (canted) spin arrangements in the studied compounds. The spin arrangement diagram was constructed.

Search for canted spin arrangement in Er2−<italic>x</italic>Tb<italic>x</italic>Fe14B with Mössbauer spectroscopy

M. Smoluchowski Institute of Physics, Jagiellonian University, 11 Prof. S. Łojasiewicza Str., 30-348 Kraków, Poland, Tel.: +48 12 664 4580

Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507 Warsaw, Poland

Department of Solid State Physics, Faculty of Physics and Applied Computer Science, AGH – University of Science and Technology, 30 Mickiewicza Ave., 30-059 Kraków, Poland

Nukleonika

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Search for canted spin arrangement in ErTbFeB with Mössbauer spectroscopy

The materials studied were polycrystalline compounds Er2−xTbxFe14B (x = 0.1, 0.2, 0.3, 0.4) which crystallize in a tetragonal lattice and display a variety of...

Search for canted spin arrangement in Er₂₋_xTb_xFe₁₄B with Mössbauer spectroscopy

Publié en ligne: 12 mars 2015

Pages: 93 - 96

Reçu: 18 juin 2014

Accepté: 15 oct. 2014

DOI: https://doi.org/10.1515/nuka-2015-0019

Mots clés
Mössbauer effect, permanent magnet materials, spin diagrams, spin reorientation

© Piotr M. Kurzydło, Bogdan F. Bogacz, Antoni T. Pędziwiatr, Dariusz Oleszak, Janusz Przewoźnik

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

Search for canted spin arrangement in Er2−xTbxFe14B with Mössbauer spectroscopy

Publié en ligne: 12 mars 2015

Pages: 93 - 96

Reçu: 18 juin 2014

Accepté: 15 oct. 2014

DOI: https://doi.org/10.1515/nuka-2015-0019

Mots clésMössbauer effect, permanent magnet materials, spin diagrams, spin reorientation

© Piotr M. Kurzydło, Bogdan F. Bogacz, Antoni T. Pędziwiatr, Dariusz Oleszak, Janusz Przewoźnik

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

Search for canted spin arrangement in Er₂₋_xTb_xFe₁₄B with Mössbauer spectroscopy

Mots clés
Mössbauer effect, permanent magnet materials, spin diagrams, spin reorientation