International Journal of Materials Engineering and Technology © 2014 Pushpa Publishing House, Allahabad, India Available online at http://pphmj.com/journals/ijmet.htm Volume 12, Number 2, 2014, Pages 177-190 Received: February 21, 2014; Accepted: March 31, 2014 Keywords and phrases: pyrochlore, specific heat, magnetic entropy, magnetocaloric. ∗ Corresponding author MAGNETIC, SPECIFIC HEAT AND MCE STUDIES OF THE ANTIFERROMAGNETIC FRUSTRATED POWDER 7 2 2 O Ti Er AND THEIR MAGNETIC FIELD DEPENDENCE N. Ben Amor a , M. Bejar a , E. Dhahri a , J.-L. Garden b and M. P. F. Graça c ,∗ a Laboratoire de Physique Appliquée Faculté des Sciences de Sfax Université de Sfax B.P 1171, 3000, Tunisie b Laboratoire de Cristallographie CNRS Département MCBT Institut Néel BP. 166, 38042 Grenoble Cedex 9, France c Department of I3N and Physics University of Aveiro 3810-193 Aveiro, Portugal e-mail: mpfg@ua.pt Abstract In this work, we present magnetization, specific heat and magnetic entropy studies on polycrystalline samples of the pyrochlore 7 2 2 O Ti Er family, at different magnetic fields. In the temperature dependence of magnetization, the magnetic temperature transition is , K 19 . 2 = N T