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Fast synthesis and magnetocaloric properties of La(Fe, Co, Si)13 compounds and their hydrides.

Number: pap. 0004

Author(s) : PAUL-BONCOUR V., NAKOURI K., PATISSIER A., et al.

Summary

LaFe11.5-xCoxSi1.5 alloys (0 = x = 2.2) have been synthetized using high energy ball milling and one of either short annealing treatment or reactive Spark Plasma Sintering. Corresponding hydrides were prepared using a Sievert method. The alloys were characterized by XRD and EPMA and the hydrides by XRD. The physical properties of all compounds were determined using magnetic measurements, DSC and Mössbauer spectroscopy. A significant increase of their cell volume is observed between paramagnetic towards ferromagnetic state. By increasing the Co content a continuous increase of the TC and the mean hyperfine field BHF has been observed. The study of corresponding hydrides shows that TC increase is not a pure additional effect but some electronic interactions between Co and H should be taken into account. Their magnetocaloric properties are a combination of both the influence of Co substitution and hydrogen insertion.

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  • Original title: Fast synthesis and magnetocaloric properties of La(Fe, Co, Si)13 compounds and their hydrides.
  • Record ID : 30025005
  • Languages: English
  • Source: 8th International Conference on Caloric Cooling (Thermag VIII). Proceedings: Darmstadt, Germany, September 16-20, 2018.
  • Publication date: 2018/09/16
  • DOI: http://dx.doi.org/10.18462/iir.thermag.2018.0004

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