Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-27T09:46:37.407Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural and Magnetocaloric Properties of Ball Milled LaFe13−xSix(H,C)y

Published online by Cambridge University Press:  15 May 2017

L. Bessais ,
M. Phejar  and
V. Paul-Boncour
L. Bessais*
Affiliation:
Université Paris-Est, ICMPE (UMR7182), CNRS-UPEC, 2-8 rue Henri Dunant F-94320 Thiais, France
M. Phejar
Affiliation:
Université Paris-Est, ICMPE (UMR7182), CNRS-UPEC, 2-8 rue Henri Dunant F-94320 Thiais, France
V. Paul-Boncour
Affiliation:
Université Paris-Est, ICMPE (UMR7182), CNRS-UPEC, 2-8 rue Henri Dunant F-94320 Thiais, France
*
*(Email: bessais@icmpe.cnrs.fr)
Get access

Abstract

LaFe13−xSix compounds display a giant magnetocaloric effect near 200 K. The insertion of light elements (H, C) is used to improve the Curie temperature near ambient temperature for magnetic refrigeration applications. We have developed a synthesis method with a short annealing treatment compared to classical melting techniques. The parent intermetallic alloys were synthesized by high energy ball milling. The insertion of H atoms was carried out using a Sievert apparatus and the carbon atom was inserted by solid/solid reaction. Moreover, structural and magnetic results were carried out by neutron diffraction and Mössbauer spectrometry for H content (y = 0.7,1.5) and C content (y = 0.7). The cell parameter and the Fe magnetic moments versus temperature are determined. The misunderstanding on interstitial site is clarified. The magnetovolume effect on the Curie temperature is explained by combination of the structural and magnetic properties. The advantages and drawbacks of each type of element insertion are discussed.

Keywords

compoundferromagneticmagnetic properties
Type
Articles
Information
MRS Advances , Volume 2 , Issue 56: Energy Storage and Conversion , 2017 , pp. 3447 - 3452
Copyright
Copyright © Materials Research Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Kitanovski, A and Egolf, Peter W, J. Magn. Magn. Mater., 321, 777, (2009).CrossRefGoogle Scholar
Fujita, A., Akamatsu, Y., and Fukamichi, K., J. Appl. Phys., 85, 4756, (1999).CrossRefGoogle Scholar
Mandal, K., Pal, D., Gutfleisch, O., Kerschl, P., and Muller, K.-H., J. Appl. Phys., 102, 053906, (2007).CrossRefGoogle Scholar
Phejar, M., Paul-Boncour, V., and Bessais, L., Intermetallics 18, 2301 (2010).CrossRefGoogle Scholar
Bessais, L., Djega-Mariadassou, C., Nandra, A., D Appay, M., and Burzo, E., Phys. Rev. B 69, 644402 (2004).CrossRefGoogle Scholar
Rosca, M., Balli, M., Fruchart, D., Gignoux, D., Hill, E. K., Miraglia, S., Ouladdiaf, B., and Wolfers, P., J. Alloys Compd., 490, 5, (2010).CrossRefGoogle Scholar
Givord, D. and Lemaire, R., IEEE Trans. Magn. MAG-10, 109 (1974).CrossRefGoogle Scholar
Wiesinger, G. and Hilscher, G., Handbook of Magnetic Materials, North-Holland, Amsterdam, (2008) .Google Scholar
Pecharsky, V. K. and Gschneidner, K. A., Phys. Rev. Lett. 78,4494, (1997).CrossRefGoogle Scholar