Magnetocaloric Effect in Gd2O3@SiO2 Nanocomposite
A. Zeleňákováa, P. Hrubovčák a, A. Berkutova a, O. Kapusta a and V. Zeleňák b
aInstitute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
bInstitute of Inorganic Chemistry, Faculty of Sciences, P.J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia
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Nanocomposite consisting of Gd2O3 nanoparticles embedded in periodical porous silica matrix was investigated with respect to its magnetocaloric properties. Series of field (up to 5 T) dependence of magnetization data were recorded in temperature range 2-52 K. The data were subsequently processed employing Maxwell relation in order to calculate magnetic entropy change (Δ SM) of the system. Examined nanocomposite exhibited reasonably high value of Δ SM ≈ 29 J/(kg K) at maximal field change 5 T at the temperature of 2 K which suggests that this material could be feasible for cryomagnetic refrigeration applications.

DOI: 10.12693/APhysPolA.131.810
PACS numbers: 75.30.Sg, 81.05.Rm, 75.20.Ck, 75.75.Fk