Skip to main content Accessibility help
×
Home

Improving Hard Magnetic and Magnetocaloric Properties of Nanocrystalline Intermetallics

  • L. Bessais (a1), R. Guetari (a1), K. Zehani (a1), J. Moscovici (a1) and N. Mliki (a2)...

Abstract

Structural and magnetic properties of nanocrystalline P6/mmm R(Fe,M)9C are presented. Their structure is explained with a model based on the R 1–s (Fe,M)5+2s formula (s = vacancy rate) where s R atoms are statistically substituted by s transition metal pairs. The maximum coercivity is obtained for low Ga/Si content for auto-coherent diffraction domain size 30 nm. This controlled microstructure might lead to hard permanent magnet materials. Furthermore, the influence of small amount of Dy substitution on magnetocaloric properties of R-Fe systme is reported. The potential for using these low-cost iron based nanostructured RFe9 powders in magnetic refrigeration at room temperature is also discussed.

Copyright

Corresponding author

References

Hide All
1. Shield, J. and Meacham, B. E., J. Appl. Phys. 87, 2055 (2000).
2. Bessais, L. and Djéga-Mariadassou, C., Phys. Rev. B, 63, 054412 (2001).
3. Djéga-Mariadassou, C. and Bessais, L., J. Magn. Magn. Mater. 81, 210 (2000).
4. Gschneidner, K. A., Pecharsky, V. K., and Tsokol, A. O., Rep. Prog. Phys. 68, 1479 (2005).
5. Tishin, A. and Spichkin, Y., The magnetocaloric effect and its applications (Bristol, 2003). (2003).
6. Phejar, M., Paul-Boncour, V., and Bessais, L., Intermetallics 18, 2301 (2010).
7. Givord, D., Laforest, J., Schweizer, J., and Tasset, F., J. Appl. Phys. 50, 2008 (1979).
8. Buschow, K. H. J., Rep. Prog. Phys. 54, 1123 (1991).
9. Djega-Mariadassou, C., Bessais, L., Nandra, A., and Burzo, E., Phys. Rev. B 68, 24406 (2003).
10. Bessais, L. et al. ., Phys. Rev. B 69, 64402 (2004).
11. Mandal, K. et al. ., J. Phys. D 37, 2628 (2004).
12. Bessais, L., Dorolti, E., and Djega-Mariadassou, C., J. Appl. Phys. 87, 192503 (2005).
13. Khazzan, S., Mliki, N., Bessais, L., and Djega-Mariadassou, C., J. Magn. Magn. Mater. 322, 224 (2010).
14. Yelon, W. B., Hu, Z., James, W. J., and Marasinghe, G. K., J. Appl. Phys. 79, 5939 (1996).

Keywords

Improving Hard Magnetic and Magnetocaloric Properties of Nanocrystalline Intermetallics

  • L. Bessais (a1), R. Guetari (a1), K. Zehani (a1), J. Moscovici (a1) and N. Mliki (a2)...

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