Abstract
57Fe, 161Dy and 166Er Mössbauer results are reported in the R2Fe14B alloys and some of the corresponding hydrides. The local moments at the six inequivalent iron crystallographic sites are inferred from the 57Fe hyperfine field data. The occurrence of fairly pure Jz = 15/2 state at the two Dy and Er sites is demonstrated from the near free ion values of the rare-earth hyperfine fields. Empirical estimates of the second order crystal field parameters are provided by the 161Dy quadrupole interaction data. Informations on the magnetic structures and spin reorientation phenomena are obtained from the study of magnetically oriented samples. A detailed analysis of the spin reorientation in (Er1-xDyx) 2Fe14B alloys allowed to estimate the importance of higher order crystal field terms (B4 0, B6 0). The study of the R1+εFe4B4 phases indicated that the iron atoms are essentially non-magnetic and revealed the occurrence of a giant value for the crystal field parameter A2 0. The magnetic properties of the Nd (Co1-xFex)9Si2 alloys, inferred by combining bulk measurements with Mössbauer and NMR data, are presented.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Berthier, Y., Chevalier, B., Etourneau, J., Rechenberg, H.R. and Sanchez, J.P. 1988. Magnetic properties of Nd(Co1 - xFex)9Si2 Alloys from magnetization, NMR and Mössbauer studies (to be published).
Bogé, M., Coey, J.M.D., Czjzek, G., Givord, D., Jeandey, C., Li, H.S. and Oddou, J.L. 1986. A 155Gd Mössbauer study of a Gd2Fe14B single crystal. J. Phys. F 16, L67–72.
Chevalier, B., Gurov, G., Fournes, L. and Etourneau, J. 1987. New ferromagnetic compounds : the ternary silicides NdCo9-xFexSi2 (0 ≤ x ≤ 5).J. Chem. Research 5, 138.
Givord, D., Li, H.S. and Moreau, J.M. 1984. Magnetic properties and crystal structure of Nd2Fe14B. Solid State Comm. 50, 497–499.
Givord, D., Li, H.S. and Tasset, F. 1985. Polarized neutron study of the compounds Y2Fe14B and Y2Fe14B. J. Appl. Phys. 57, 4100–4102.
Givord, D., Moreau, J.M. and Tenaud, P. 1986. Refinement of the crystal structure of R1+ε Fe4B4 compounds (R = Nd, Gd). J. Less Common Met. 123, 109–116.
Friedt, J.M., Sanchez, J.P., L’Heritier, P. and Fruchart, R.1984. Mössbauer spectroscopy in the RE2Fe14BHxmaterials. In “Proceedings of the Workshop on Nd-Fe Permanent Magnets” (Ed. I.V, Mitchell). (Commission of the European Communities, Brussels), pp.179–182.
Friedt, J.M., Vasquez, A., Sanchez, J.P., L’Heritier, P. and Fruchart, R. 1986a. Magnetism and crystal field properties of the RE2Fe14BHx alloys (RE = Y, Ce, Dy, Er) from Mössbauer spectroscopy. J. Phys. F 16, 651–667.
Friedt, J.M., Vasquez, A., Sanchez, J.P., L’Héritier, P. and Fruchart, R. 1986b. Mössbauer spectroscopy on RE2Fe14BHx alloys. Hyperfine Interactions 28, 611–614.
Niarchos, D., Zouganelis, G., Kostikas, A. and Simopoulos, A. 1986. Magnetic properties of the R1=ε£Fe4B4 compounds (R = rare earth) from magnetization and Mossbauer measurements. Solid State Comm. 59, 389–391.
Rechenberg, H.R. and Sanchez, J.P. 1987. Effective magnetic fields on Fe in R1+εFe4 alloys. Solid State Comm. 62, 461–464.
Rechenberg, H.R., Sanchez, J.P., L’heritier, P. and Fruchart, R. 1987a. Crystal-field interactions and spin reorientation in (Er1-xDyx)2Fe14B. Phys. Rev. B 36, 1865–1871.
Rechenberg, H.R., Bogé, M., Jeandey, C., Oddou, J.L., Sanchez, J.P. and Tenaud, p. 1987. 155Gd and 161Dy Mössbauer study of R1+εFe4B4 alloys (R = Gd, Dy). Solid State Comm. 64, 277–281.
Sanchez, J.P., Friedt, J.M., Vasquez, A., L’Héritier, P. and Fruchart, R. 1986. 166Er Mössbauer spectroscopy in the E2Fe14BHx alloys. Solid State Comm. 57, 309–313.
Sanchez, J.P. 1987. New permanent magnets investigated by Mossbauer spectroscopy. In “Proceedings of XXII Zakopane School on Physics, Part 2 : condensed matter studies by nuclear methods” (Eds. K. Krolas and K. Tomala) (Institute of Nuclear Physics and Jagiellonian University, Krakow), pp.156–193.
Vasquez, A., Friedt, J.M., Sanchez, J.P., L’Héritier, P. and Fruchart, R. 1985. Spin reorientation phenomena in RE2Fe14B (RE = Ce, Dy, Er) alloys from 57Fe and 161Dy Mössbauer spectroscopies. Solid State Comm. 55, 783–786.
Vasquez, A. and Sanchez, J.P. 1987. Spin reorientation phenomena in (Er Gd ) Fe,B alloys. J. Less. Common. Met. 127, 71–78.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 ECSC, EEC, EAEC, Brussels and Luxembourg
About this chapter
Cite this chapter
Sanchez, J.P. (1989). Intrinsic Properties of Ternary Rare-Earth Compounds from 57Fe, 161Dy, 166Er Mössbauer Spectroscopies. In: Mitchell, I.V., Coey, J.M.D., Givord, D., Harris, I.R., Hanitsch, R. (eds) Concerted European Action on Magnets (CEAM). Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1135-2_25
Download citation
DOI: https://doi.org/10.1007/978-94-009-1135-2_25
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7003-4
Online ISBN: 978-94-009-1135-2
eBook Packages: Springer Book Archive