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

• Authors: Piotr M. Kurzydło , Bogdan F. Bogacz , Antoni T. Pędziwiatr , Dariusz Oleszak , Janusz Przewoźnik
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

Mössbauer effect; permanent magnet materials; spin diagrams; spin reorientation

• Publisher: De Gruyter Open
• Journal: Nukleonika
• Year: 2015
• Volume: 60
• Issue: 1
• Pages: 93-96

Dates

published

1 - 3 - 2015

online

12 - 3 - 2015

accepted

15 - 10 - 2014

received

18 - 6 - 2014

Contributors

author

Piotr M. Kurzydło

• M. Smoluchowski Institute of Physics, Jagiellonian University, 11 Prof. S. Łojasiewicza Str., 30-348 Kraków, Poland, Tel.: [phone]

author

Bogdan F. Bogacz

• M. Smoluchowski Institute of Physics, Jagiellonian University, 11 Prof. S. Łojasiewicza Str., 30-348 Kraków, Poland, Tel.: [phone]

author

Antoni T. Pędziwiatr

• M. Smoluchowski Institute of Physics, Jagiellonian University, 11 Prof. S. Łojasiewicza Str., 30-348 Kraków, Poland, Tel.: [phone]

author

Dariusz Oleszak

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

author

Janusz Przewoźnik

• 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

References

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Identifiers

DOI

10.1515/nuka-2015-0019