Structural and Magnetocaloric Study οf the LaFe_{11.0}Co_{0.8}(Si_{0.4}Al_{0.6})_{1.2} Alloy

• Authors: P. Gębara , P. Pawlik , I. Škorvánek , J. Marcin , J. Wysłocki
• Languages of publication: EN

Abstracts

EN

In this study, we have investigated the microstructure and magnetic entropy change of annealed LaFe_{11.0}Co_{0.8}(Si_{0.4}Al_{0.6})_{1.2} alloy in a form of bulk samples and melt-spun ribbons. The bulk samples were annealed at 1323 K for 20 and 49 days and the maximum values of the magnetic entropy change | ΔS_M | obtained after the change of external magnetic field from 0 to 5 T reached 7.5 J kg^{-1} K^{-1} and 7.7 J kg^{-1} K^{-1}, respectively. For the melt-spun ribbon annealed at the same temperature for 1 h, the maximum value of | ΔS_M | reaches 4.5 J kg^{-1} K^{-1}. The temperature corresponding to the maximum entropy change increased from 292 K for bulk samples to 295 K for melt-spun ribbons. The lower values of the magnetic entropy change in the melt-spun LaFe_{11.0}Co_{0.8}(Si_{0.4}Al_{0.6})_{1.2} are attributed to the presence of higher volume fraction of the secondary bcc-Fe phase in the ribbon samples.

Keywords

EN

75.30.Sg; 75.50.Bb

Discipline

• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)
• 75.50.Bb: Fe and its alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 910-912

Dates

published

2010-11

Contributors

author

P. Gębara

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

P. Pawlik

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

I. Škorvánek

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

J. Marcin

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

J. Wysłocki

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

References

• 1. V.K. Pecharsky, K.A. Gschneidner, Appl. Phys. Lett. 70, 3299 (1997)
• 2. T.T.M. Palstra, J.A. Mydosh, G.J. Nieuwenhuys, A.M. van der Kraan, K.H.J. Buschow, J. Magn. Magn. Mater. 36, 290 (1983)
• 3. T.T.M. Palstra, H.G.C. Werij, G.J. Nieuwenhuys, J.A. Mydosh, F.R. de Boer, K.H.J. Buschow, J. Phys. F 14, 1961 (1984)
• 4. F.-X. Hu, B.-G. Shen, J.-R. Sun, Z.-H. Cheng, G.-H. Rao, X.-X. Zhang, Appl. Phys. Lett. 78, 3675 (2001)
• 5. F.-X. Hu, B.-G. Shen, J.-R. Sun, G.-J. Wang, Z.-H. Cheng, Appl. Phys. Lett. 80, 826 (2002)
• 6. X.-B. Liu, Z. Altounian, J. Magn. Magn. Mater. 264, 209 (2003)
• 7. J. Shen, Y.-X. Li, B. Gao, J.-R. Sun, B.-G. Shen, J. Magn. Magn. Mater. 310, 2823 (2007)
• 8. A. Fujita, Y. Akamatsu, K. Fukamichi, J. Appl. Phys. 85, 4756 (1999)
• 9. K.H.J. Bushow, Rep. Prog. Phys. 40, 1179 (1977)
• 10. P.Y. Krypiakewytsch, O.S. Zaretschniuk, E.I. Hladyschewskyj, O.I. Bodak, Z. Anorg. Allg. Chem. 358, 90 (1968)
• 11. X.-B. Liu, D.H. Ryan, Z. Altounian, J. Magn. Magn. Mater. 270, 305 (2004)
• 12. W. Kraus, G. Nolze, PowderCell 2.4, D-BAM, Berlin 2000
• 13. Y. Zhao, J. Liang, G. Rao, W. Tang, G. Quan, J. Phys., Condens. Matter 9, 7463 (1997)
• 14. V.K. Pecharsky, K.A. Gschneidner, J. Magn. Magn. Mater. 200, 44 (1999)
• 15. J. Lyubina, O. Gutfleisch, M.D. Kuz'min, M. Richter, J. Magn. Magn. Mater. 320, 2252 (2008)

Identifiers

DOI

10.12693/APhysPolA.118.910