Magnetic and magnetocaloric properties in Nd1-3Bax Cax SrxMnO3 (x=0.11and 0.133) perovskite manganites

Naima Mtiraoui (1) , Nesrine Dhouibi (2) , Jemai Dhahri (3) , Olivier Toulemonde (4)

1 Laboratoire Physico-chimie structurale
2 Umm Al-Qura University
3 Laboratoire de Recherche de Physique des Solides
4 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

A systematic investigation of structural, magnetic and magnetocaloric properties for Nd1-3xBax Cax SrxMnO3 (x ​= ​0.11 and 0.133) manganites is reported. X-ray powder diffraction (XRD) patterns suggest that our samples crystallize in the orthorhombic perovskite structure with a Pbnm space group. Magnetization temperature dependence under the field-cooled cooling (FCc), field-cooled warming (FCw) and zero-field-cooling (ZFC) modes exhibit a ferromagnetic(FM)- paramagnetic(PM) phase transition at TC temperature increasing from 120 ​K for x ​= ​0.11–145 ​K for x ​= ​0.133. An analysis using the Banerjee’s criterion curves near TC indicates that x ​= ​0.11 displays a second-order transition while x ​= ​0.133 displays a first order magnetic phase transition. The analysis is further confirmed by the phenomenological universal curves of the normalized entropy variation as a function of rescaled temperature...

Mots clés: Perovskite; Magnetization; Phase transition; Magnetic refrigeration; Modeling and simulation

Domaines: Matériaux

Naima Mtiraoui, Nesrine Dhouibi, Jemai Dhahri, Olivier Toulemonde. Magnetic and magnetocaloric properties in Nd1-3Bax Cax SrxMnO3 (x=0.11and 0.133) perovskite manganites. Journal of Solid State Chemistry, 2021, 294, pp.121847. ⟨10.1016/j.jssc.2020.121847⟩. ⟨hal-03108762⟩