title: Effect of Zn substitution on the magnetic and magnetocaloric properties of Cd1-xZnxCr2Se4spinel.
abstract: The influence of Zn substitution on the magnetic and magnetocaloric properties of Cd1-xZnxCr2Se4(0.35 ≤ x ≤ 0.45) spinel was investigated. All the samples exhibited two successive magnetic transitions associated with the reentrant spin glass at a freezing temperature (Tf) and Curie temperature (TC). It was demonstrated that Tfchanged slightly with the Zn content; however, the TCvalue decreased with increasing Zn content due to the decrease of lattice constant. The magnetic entropy variation (-ΔSM) was found to exhibit two maxima at TCand Tf, which have an opposite trend as a function of Zn content. With increasing Zn content, (-ΔSM) was found to decrease at TC, whereas at Tf, (-ΔSM) increased. It was shown that the change of (-ΔSM) is closely correlated to the local exponent factor n at both transitions. The results showed that materials with double magnetic transitions could be integrated in a new class of magnetic refrigeration working in different temperature windows.
authors.affiliation: LPMMAT, faculté des Sciences Ain Chock, Université Hassan II de Casablanca, B.P. 5366 Casablanca, Morocco. reda.moubah@hotmail.fr.
authors.forename: M
authors.identifier: http://orcid.org/0000-0001-8620-1572
authors.initials: M
authors.lastname: Bouhbou
authors.affiliation: LPMMAT, faculté des Sciences Ain Chock, Université Hassan II de Casablanca, B.P. 5366 Casablanca, Morocco. reda.moubah@hotmail.fr.
authors.forename: R
authors.identifier: http://orcid.org/0000-0001-7141-8533
authors.initials: R
authors.lastname: Moubah
authors.affiliation: LPM, Faculté des Sciences, Université Mohammed V, B.P. 1014 Rabat, Morocco.
authors.forename: W
authors.initials: W
authors.lastname: Belayachi
authors.affiliation: LPM, Faculté des Sciences, Université Mohammed V, B.P. 1014 Rabat, Morocco.
authors.forename: A
authors.initials: A
authors.lastname: Belayachi
authors.affiliation: LPMMAT, faculté des Sciences Ain Chock, Université Hassan II de Casablanca, B.P. 5366 Casablanca, Morocco. reda.moubah@hotmail.fr.
authors.forename: H
authors.initials: H
authors.lastname: Lassri