1. bookVolume 62 (2017): Issue 2 (June 2017)
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

Spin reorientation process in Tm2–xHoxFe14B – analysis of conical arrangement based on Mössbauer spectra

Published Online: 09 Jun 2017
Volume & Issue: Volume 62 (2017) - Issue 2 (June 2017)
Page range: 123 - 127
Received: 21 Jun 2016
Accepted: 29 Sep 2016
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
Abstract

The spin reorientation process in the Tm2-xHoxFe14B series of compounds was studied using 57Fe Mössbauer spectroscopy over the temperature range 5.2-320 K with a focus on the analysis of conical spin arrangement. Each compound was studied by precise Mössbauer scanning in the vicinity of the transition and during the transition. By applying computer simulations based on the simplified Yamada-Kato model, as well as on some literature data for R2Fe14B (R = Tm, Ho) compounds, the above series was selected for studies as it contains compounds with different spin arrangements (axial, planar, conical). It was a crucial requirement for obtaining unambiguous angular dependences when applying a simultaneous fitting procedure of Mössbauer spectra. Such an extended procedure was applied which allowed the temperature dependence of the angle describing the position of the magnetization vector to be obtained. The results were compared with those from theoretical simulations. The spin arrangement diagram was constructed. A conical spin arrangement was confirmed over a wide temperature range.

Keywords

1. Herbst, I. F. (1991). R2Fe14B materials: Intrinsic properties and technological aspects. Rev. Mod. Phys., 63(4), 819.10.1103/RevModPhys.63.819Search in Google Scholar

2. O’Handley, R. C. (2000). Modern magnetic materials: Principles and applications. New York: Wiley.Search in Google Scholar

3. Lim, J. T., Kim, H. K., Kim, C. S., An, S. Y., & Choi, K. R. (2015). Investigation of the magnetic properties of Dy doped Nd-Fe-B permanent magnet by using Mössbauer spectroscopy. J. Korean Phys. Soc., 66, 1913-1917. DOI: 10.3938/jkps.66.1913.10.3938/jkps.66.1913Search in Google Scholar

4. Pankratov, N. Yu., Nikitin, A. A., Iwasieczko, W., Drulis, H., Skokov, K. P., Pastushenkov, Yu. G., Harutjunjan, N., Lyubina, J., Gutfleisch, O., Handstein, A., & Müller, K. -H. (2006). Spin-reorientation transition in Nd2(Fe,Co)14B compounds and their hydrides. J. Magn. Magn. Mater., 300, e465-e468. DOI: 10.1016/j.jmmm.2005.10.195.10.1016/j.jmmm.2005.10.195Search in Google Scholar

5. Hirosawa, S., Yutaka, M., Hitoshi, Y., Setsuo, F., Masato, S., & Hiroshi, Y. (1986). Magnetization and magnetic anisotropy of R2Fe14B measured on single crystals. J. Appl. Phys., 59, 873. DOI: 10.1063/1.336611.10.1063/1.336611Search in Google Scholar

6. Ibarra, M. R., Pareti, L., Algarabel, P. A., Morellon, L., Marquina, C., & Solzi, M. (1993). Magnetic anisotropy in (ErxHo1-x)2Fel4B pseudoternary intermetallic compounds. J. Phys.-Condens. Matter, 5(31), 5637. DOI: 10.1088/0953-8984/5/31/025.10.1088/0953-8984/5/31/025Search in Google Scholar

7. Piqué, C., Burriel, R., & Bartolomé, J. (1996). Spin reorientation phase transitions in R2Fel4B (R = Y, Nd, Ho, Er, Tm) investigated by heat capacity measurements. J. Magn. Magn. Mater., 154, 71-82. DOI: 10.1016/0304-8853(95)00571-4.10.1016/0304-8853(95)00571-4Search in Google Scholar

8. Wolfers, P., Bacmann, M., & Fruchart, D. (2001). Single crystal neutron diffraction investigations of the crystal and magnetic structures of R2Fe14B (R=Y, Nd, Ho, Er). J. Alloy. Compd., 317/318, 39-43. DOI: 10.1016/S0925-8388(00)01353-0.10.1016/S0925-8388(00)01353-0Search in Google Scholar

9. Rillo, C., Chaboy, J., Navarro, R., Bartolome, J., Fruchart, D., Chenevier, B., Yaouanc, A., Sagawa, M., & Hirosawa, S. (1988). Dynamical susceptibility of Ho2Fe14B single crystal: Spin rotation and domain wall motions. J. Appl. Phys., 64, 5534-5536. DOI: 10.1063/1.342327.10.1063/1.342327Search in Google Scholar

10. Kurzydło, P. M., Pędziwiatr, A. T., Bogacz, B. F., Przewoźnik, J., & Oleszak, D. (2016). Conical spin arrangement and spin reorientation process in Er2-xHoxFe14B observed with Mössbauer spectroscopy. J. Alloy. Compd., 684, 587-593. DOI: 10.1016/j.jalcom.2016.05.140.Search in Google Scholar

11. 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.38.620.10.1103/PhysRevB.38.6209945225Search in Google Scholar

12. Burzo, E. (1998). Permanent magnets based on R-Fe-B and R-Fe-C alloys. Rep. Prog. Phys., 60, 1099-1266. DOI: 10.1088/0034-4885/61/9/001.10.1088/0034-4885/61/9/001Search in Google Scholar

13. Coey, J. M. D. (1996). Rare-earth iron permanent magnet. Oxford: Clarendon Press.Search in Google Scholar

14. 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.Search in Google Scholar

15. Susilo, R. A., Munoz Perez, S., Cobas, R., Cadogan, J. M., & Avdeev, M. (2012). Magnetic order and spinreorientation in HoGa. J. Phys.-Conf. Series, 340, 012071. DOI: 10.1088/1742-6596/340/1/012071.10.1088/1742-6596/340/1/012071Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo