Electrolytic Hydriding of La(Fe, Si)₁₃ Based Materials and its Magnetocaloric Effect

Abstract:

In this paper, the hydriding of La (Fe, Fe)₁₃ based alloys was realized by the electrolytic method and the effect of electrolytic temperature on the hydriding was investigated. The phase components and surface morphology were analyzed by XRD and SEM. The magnetic properties of samples were characterized using VSM. Results showed that the electrolytic hydriding process was enhanced by increasing the electrolytic temperature. The Curie temperature was increased from 196 K to 325 K. Through Arrot-plot analyses, it was found that the phase transition of samples tends to be a second order phase transition. The magnetic entropy change was reduced from 8.03 J/(kg•K) to 2.03 J/(kg•K) under a maximum external field of 1.5 T.

• Periodical: Materials Science Forum (Volumes 809-810)
• Pages: 443-448
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.809-810.443
• Online since: December 2014
• Authors: Kun Yang, Na Tian, Cai Yin You*
• Keywords: Curie Temperature, Electrolytic Hydriding, Magnetic Entropy Change, Magnetocaloric Effect

References

[1] O. Tegus, E. Bruck, K.H.J. Buschow and F.R. de Boer, Transition-metal-based magnetic refrigerants for room-temperature applications. Nature[J]. Vol. 415 (2002) p.150.

DOI: 10.1038/415150a

[2] F.X. Hu, B.G. Shen, J. R. Sun and Z. H. Chen, Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11. 4Si1. 6. J. Appl. Phys[J]. Vol. 78 (2001) No. 3, p.3675.

DOI: 10.1063/1.1375836

[3] V. K. Pecharsky and K. A. Gschneidner, Magnetocaloric effect and magnetic refrigeration. J. Magn. Magn. Mater[J]. Vol. 200 (1999) No. 1, p.44.

[4] A. Fujita, S. Fujieda, Y. Hasegawa and K. Fukamichi, Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1–x)13compounds and their hydrides. Phys. Rev. B[J]. Vol. 67 (2003) p.104416.

DOI: 10.1002/chin.200535243

[5] M. Balli, D. Fruchart and D. Gignoux, Optimization of La( Fe, Co)(13-x)Six based compounds for magnetic refrigeration. Journal of Physics: Condensed Matter[J]. Vol. 19 (2007) No. 23, p.236230.

DOI: 10.1088/0953-8984/19/23/236230

[6] Q.Y. Dong, H.W. Zhang, T.Y. Zhao, J.R. Sun and B.G. Shen, Realization of a small hysteresis loss and a large magnetic entropy change in NaZn13-type La–Fe–Si compound. Solid State Communications[J]. Vol. 147 (2008) No. 7-8, p.266.

DOI: 10.1016/j.ssc.2008.06.005

[7] Y.F. Chen, F. Wang, B.G. Shen, J.R. Sun, G.J. Wang, F. X. Hu, Z.H. Cheng and T. Zhu, Effects of carbon on magnetic properties and magnetic entropy change of the LaFe11. 5Si1. 5 compound. J. Appl. Phys[J]. Vol. 93 (2003) No. 10 p.6981.

DOI: 10.1063/1.1558658

[8] J. Lyubina, U. Hannemann, M. P. Ryan and L. F. Cohen, Electrolytic hydriding of LaFe13−xSix alloys for energy efficient magnetic cooling. Adv. Mater. [J]. Vol. 24 (2012) No. 15, p. (2042).

DOI: 10.1002/adma.201200112

[9] J. Lyubina, Recent advances in the microstructure design of materials for near room temperature magnetic cooling (invited). J. Appl. Phys[J]. Vol. 109 (2011) No. 7, p. 07A902.

DOI: 10.1063/1.3540372

[10] S. Fujieda, Y. Hasegawa, A. Fujita and K. Fukamichi, Thermal transport properties of magnetic refrigerants La(FexSi1–x)13 and their hydrides, and Gd5Si2Ge2 and MnAs. J. Appl. Phys [J]. Vol. 95 (2008) No. 5, p.2429.

DOI: 10.1063/1.1643774

[11] Y.F. Chen, F. Wang, B.G. Shen, F.X. Hu, Z.H. Chen, G.J. Wang and J.R. Sun, Large magnetic entropy change near room temperature in the LaFe11. 5Si1. 5H1. 3 interstitial compound. Chinese Physics[J]. Vol. 11 (2002) No. 7, p.741.