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

• Autorzy: Kurzydło P. M. , Bogacz B. F. , Pędziwiatr A. T. , Oleszak D. , Przewoźnik J.

Identyfikatory

DOI

10.1515/nuka-2015-0019

• Konferencja: All-Polish Seminar on Mössbauer Spectroscopy OSSM 2014 (10th ; 15-18.06.2014 ; Wrocław, Poland)
• Języki publikacji: EN

Abstrakty

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 fi tting procedure to investigate the infl uence of the transition on the shape of the spectra. The fi tting program was specifi ed to analyze the transition according to the ‘two state model’: spins fl ip abruptly from initial angle to fi nal 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.

Słowa kluczowe

EN

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

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2015
• Tom: Vol. 60, No. 1
• Strony: 93--96
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Kurzydło P. M.

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

autor

Bogacz B. F.

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

autor

Pędziwiatr A. T.

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

autor

Oleszak D.

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

autor

Przewoźnik J.

• 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

Bibliografia

• 1. Kato, H., Ishizaki, T., & Miyazakiet, T. (2001). Successive spin reorientation and magnetostriction in (Er1-xTbx)2Fe14B. IEEE Trans. Magn., 37(4), 2702–2704. DOI: 10.1109/20.951280.
• 2. Lim, D. W., Kato, H., Yamada, M., Kido, G., & Nakagawa, Y. (1992). Spin reorientation and first-order magnetization processes in (Er1-xTbx)2Fe14B. J. Magn. Magn. Mater., 104/107, 1429–1430. DOI: 10.1016/0304-8853(92)90649-9.
• 3. Obermyer, R. T., & Pourarian, F. (1991). Effect of partial substitution of Tb on the spin reorientation of the Er2-xTbxFe14B system. J. Appl. Phys., 69(8), 5559–5561. DOI: 10.1063/1.347949.
• 4. Yamada, M., Kato, H., Yamamoto, H., & Nakagawa, Y. (1988). Crystal-fi eld analysis of the magnetization process in a series of Nd2Fe14B-type compounds. Phys. Rev. B, 38, 620–633. DOI: 10.1103/PhysRevB.38.620.
• 5. Liu, Y., Sellmyer, D. J., & Shindo, D. (2006). Handbook of advanced magnetic materials. Volume I. New York: Springer.
• 6. Bogacz, B. F., & Pędziwiatr, A. T. (2013). Crystal electric fi eld parameters determination for R2Fe14B compounds based on Yamada–Kato model. Nukleonika, 58(1), 31–33.
• 7. O’Handley, R. C. (2000). Modern magnetic materials: Principles and applications. New York: Wiley.
• 8. Pędziwiatr, A. T., Bogacz, B. F., & Gargula, R. (2003). Spin arrangement diagrams for Er2−xRxFe14B (R =Y, Ce) obtained with Mössbauer spectroscopy and phenomenological model. Nukleonika, 48(1), 59–63.
• 9. Bogacz, B. F., Rubin, J., Pedziwiatr, A. T., Bartolome, J., Wielgosz, R., & Artigas, M. (1999). Calculation and experimental magnetic phase diagrams for (Nd,Y)2(FeCo)14B systems. In Proceedings of XXXIV Zakopane School of Physics, May 1999 (pp. 191–198), Kraków: Institute of Physics, Jagiellonian University.
• 10. Coey, J. M. D. (1996). Rare-earth iron permanent magnet. Oxford: Clarendon Press.
• 11. Batancourt, R. J. I. (2002). Nanocrystalline hard magnetic alloys. Rev. Mex. Fis., 48(4), 283–289.