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Journal
2015 | 60 | 1 | 93-96
Article title

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

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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.
Publisher
Journal
Year
Volume
60
Issue
1
Pages
93-96
Physical description
Dates
published
1 - 3 - 2015
online
12 - 3 - 2015
accepted
15 - 10 - 2014
received
18 - 6 - 2014
References
  • 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.[Crossref]
  • 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.[Crossref]
  • 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.[Crossref]
  • 4. Yamada, M., Kato, H., Yamamoto, H., & Nakagawa, Y. (1988). Crystal-field analysis of the magnetization process in a series of Nd2Fe14B-type compounds. Phys. Rev. B, 38, 620–633. DOI: 10.1103/PhysRevB.38.620.[Crossref]
  • 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 field 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.
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.-psjd-doi-10_1515_nuka-2015-0019
Identifiers
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