Magnetic Properties and Magnetocaloric Effect in Gd100-xCox Thin Films - Université de Lorraine
Journal Articles Crystals Year : 2019

Magnetic Properties and Magnetocaloric Effect in Gd100-xCox Thin Films

Abstract

We investigated the magnetic and magnetocaloric properties of Gd 100-x Co x (x = 40 to 56) thin films fabricated by the sputtering technique. Under an applied field change ∆H = 20 kOe , the magnetic entropy change (∆S m) decreases from 2.64 Jkg −1 K −1 for x = 44 to about 1.27 Jkg −1 K −1 for x = 56. Increasing the Co concentration from x = 40 to 56 shifts the Curie temperature of Gd 100-x Co x (x = 40 to 56) thin films from 180 K toward 337 K. Moreover, we extracted the values of critical parameters T c , β, γ, and δ by using the modified Arrott plot methods. The results indicate the presence of a long-range ferromagnetic order. More importantly, we showed that the relative cooling power (RCP), which is a key parameter in magnetic refrigeration applications, is strongly enhanced by changing the Co concentration in the Gd 100-x Co x thin films. Our findings help pave the way toward the enhancement of the magnetocaloric effect in magnetic thin films.
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hal-02185987 , version 1 (17-07-2019)

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Mohamed Tadout, Charles-Henri Lambert, Mohammed Salah El Hadri, Abdelilah Benyoussef, Mohammed Hamedoun, et al.. Magnetic Properties and Magnetocaloric Effect in Gd100-xCox Thin Films. Crystals, 2019, 9 (6), pp.278. ⟨10.3390/cryst9060278⟩. ⟨hal-02185987⟩
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