Skip to main content Accessibility help
×
Home

Spin Reorientations in (ErxY1-x)2Fe14B and (ErxPr1-x)2Fe14B Systems

  • E. B. Boltich (a1), A. T. Pedziwiatr (a1) and W. E. Wallace (a1)

Abstract

The bulk magnetic properties of (ErxY1-x)2Fe14B and (ErxPr1-x)2Fe14B systems were studied over the temperature range 4.2-1100 K. Lattice parameters, saturation magnetizations, Curie temperatures and spin reorientation temperatures were determined. Theoretical description of the detailed magnetic behavior is presented, based on a crystal field model. The (ErxY1-x)2Fe14B compounds were all found to exhibit plane-to-axis spin reorientations similar to that observed for Er2Fe14B, with the transition temperature decreasing with increasing Y content. In contrast, the spin reorientations in the (ErxPr1-x)2Fe14B systems appear to be of the cone-to-axis type. Since higher order crystal field terms appear to be significant only in the cases of Nd3+ and Ho3+, the results are discussed in terms of a crystal field Hamiltonian involving only 2nd order terms. Using known values of the exchange field, Fe anisotropy and the ratios of the crystal field coefficients, the multi-ion cr 6.tal field problem was formulated in terms of a single adjustable parameter (B0 2(f). It is shown that 2nd order crystal field terms are capable, not only of explaining the conical anisotropy of the (ErxPr1-x)2Fe14B systems, but also the decrease in the Er moment upon passing through the spin reorientation (as has been observed for Er2Fe14B). The magnetic structure of Er1.5Pr0.5Fe14B is also predicted.

Copyright

References

Hide All
1. Hirosawa, S. and Sagawa, M., Solid State Comm. 54, 335 (1985).
2. Boltich, E. B. and Wallace, W. E., Solid State Comm. 54, 529 (1985).
3. Vasquez, A., Friedt, J. M., Sanchez, J. P., L'Heritier, Ph. and Fruchart, R., Solid State Comm. 54, 783 (1985).
4. Davis, R. L., Day, R. K. and Dunlop, J. B., Solid State Comm. 56, 181 (1985).
5. Tokuhara, K., Ohtsu, Y., Ono, F., Yamada, O., Sagawa, M. and Matsuura, Y., Solid State Comm. 54, 333 (1985).
6. Yamada, M., Yamaguchi, Y., Kato, H., Yamamoto, If., Nakagawa, Y., Hirosawa, S. and Sagawa, M., Solid State Comm. 54, 663 (1985).
7. Koon, N. C., Abe, M., Callen, E., Das, B. N., Liou, H. S., Martinez, A. and Segnan, R., J. Mag. Mag. Mat. 54–57, 593 (1986).
8. Koon, N. C., Das, D. N. and Williams, C. M., J. Mag. Mag. Mat. 54–57, 523 (1986).
9. Hiroyoshi, H., Saito, N., Kido, G., Nakagawa, Y., Hirosawa, S. and Sagawa, M., J. Mag. Mag. Mat. 54–57, 583 (1986).
10. Niarchos, D. and Simopoulos, A., Solid State Comm. 59, 669 (1986).
11. Burlet, P., Coey, J. M. D., Gavigan, J. P., Givord, D. and Meyer, C., Solid State Comm. 60, 723 (1986).
12. B.Yelon, W. and Herbst, J. F., J. Appl. Phys. 59, 93 (1986).
13. Boltich, E. B., Pedziwiatr, A. T. and Wallace, W. E., J. Mag. Mag. Mat., 66,317 (1987).
14. Givord, D., Li, H. S., Perrier de la Bathie, R., Solid State Comm. 51, 857 (1984).
15. Pedziwiatr, A. T. and Wallace, W. E., J. Mag. Mat. 65, 139 (1987).
16. Stevens, K. W. H., Proc. Phys. Soc. (London) A65, 209 (1952).
17. Vasquez, A. and Sanchez, J. P., presented at the 17th Rare Earth Research Conference, Hamilton, Canada, June 8–12, 1986, and to appear in J. Less-Common Met.
18. Oesterreicher, H., Phys. Status Solidi BI31, K123 (1985)
19. Boge, M., Coey, J. M. D., Czjzek, G., Givord, D., Jeandey, C., Li, H. S. and Oddou, J. L., Solid State Comm. 55, 295 (1985).
20. Wallace, W. E., Sankar, S. G. and Rao, V. U. S., Structure and Bonding 33, 1 (1977).
21. Berthier, Y., Boge, M., Czjzek, G., Givord, D., Jeandey, C., Li, H. S. and Oddou, J. L., J. Mag. Mag. Mat. 54–57, 589 (1986).
22. Givord, D., Li, H. S. and Moreau, J. M., Solid State Comm. 50, 497 (1984).
23. Xiaojia, L., Yoy, X., Guilin, Y., Hongru, Z. and Yiglie, L., Proc. 8th Int. Workshop on Rare Earth Magnets, edited by Strnat, K. J. (University of Dayton Press, Dayton, OH, 1985), p. 687.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed