Effect of Al content on the order of phase transition and magnetic entropy change in $\mathrm{LaFe_{11}Co_{0.8}(Si_{1-x}Al_{x})_{1.2}}$ alloys

Gębara, P.; Pawlik, P.; Michalski, B.; Škorvánek, I.; Bednarcik, J.; Wysłocki, J. J.; Michalik, Š.; Marcin, J.; Donges, J.

doi:10.1016/j.jmmm.2014.07.053

Journal Article

PUBDB-2014-04323

Effect of Al content on the order of phase transition and magnetic entropy change in $\mathrm{LaFe_{11}Co_{0.8}(Si_{1-x}Al_{x})_{1.2}}$ alloys

Gębara, P. (Corresponding Author) ; Pawlik, P. ; Škorvánek, I. ; Bednarcik, J.DESY* ; Marcin, J. ; Michalik, Š.Extern* ; Donges, J.Extern* ; Wysłocki, J. J. ; Michalski, B.

2014
North-Holland Publ. Co. Amsterdam

Journal of magnetism and magnetic materials 372, 201 - 207 (2014) [10.1016/j.jmmm.2014.07.053]

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Abstract: The comparative studies of the effect of partial substitution of Al by Si on the structure and magnetic entropy change in LaFe$_{11}$Co$_{0.8}$(Si$_{1-x}$Al$_{x}$)$_{1.2}$ alloys produced by arc-melting followed by long time annealing at 1323 K were performed. The X-ray diffraction analysis revealed almost single phase composition of annealed samples. The high intensity synchrotron radiation was used for studying the thermal evolution of lattice constant of the La(Fe,Co,Si)$_{13}$ phase. Furthermore, calculations of temperature dependences of Landau coefficients were used to reveal changes in the character of phase transformation at around the Curie temperature.

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