MAGNETOCALORIC EFFECT AROUND CURIE TEMPERATURE IN Ni50-x CuxMn38Sn12B3 SHAPE MEMORY RIBBONS

Authors : Olcay KIZILASLAN

Pages : 150-160

Doi:10.33769/aupse.532422

View : 11 | Download : 7

Publication Date : 2019-12-01

Article Type : Research Paper

Abstract :The magnetocaloric effect in Ni 50-x Cu x Mn 38 Sn 12 B 3 ribbons depending on the Cu substitution insert ignore into journalissuearticles values(x= 0, 1, 3); was investigated around the Curie temperature. The purpose of the present study was to analyze the magnetocaloric effect around a second order phase transition insert ignore into journalissuearticles values(around the Curie temperature); which has a smaller thermal hysteresis compared to a first order phase transition insert ignore into journalissuearticles values(Martensitic transition);. The Curie temperature of the ribbons shifted to higher temperatures with increasing Cu content. A conventional magnetocaloric effect insert ignore into journalissuearticles values(MCE); was observed around the Curie temperature when the ribbons are subjected to a magnetic field change of 5 T. The magnetic entropy changes were calculated based on the isothermal magnetization   data using thermodynamic Maxwell equation. The highest magnetic entropy change and the refrigerant capacity was obtained for the x=1 ribbon. 
Keywords : Ni Mn Sn Heusler Alloys, Magnetocaloric Effect, Magnetic Properties