Magnetocaloric effect of Fe(Rh1-xPdx) alloys

作者：Nishimura Katsuhiko^*; Nakazawa Yoshiyuki; Li Lingwei; Mori Katsunori

来源：Materials Transactions, 2008, 49(8): 1753-1756.

DOI：10.2320/matertrans.MRA2008080

• magnetocaloric effect
• iron rhodium alloys
• palladium substitution

Magnetocaloric effects of Fe-49(Rh1-xPdx)(51) alloys with x = 0.0, 0.01, 0.03, 0.06, 0.07. 0.08, and 0.09, were investigated using resistivity, magnetization, specific heat, and direct measurement of the adiabatic temperature change AT. Magnetization measurements yielded experimental values of the isothermal magnetic-entropy change Delta S for all the samples. The critical temperature of the anitiferromagnetic-ferromagnetic transition was found to depend largely on the substitution concentrations of Pd. A broad peak in Delta S, up to 1.7J center dot mol(-1) K-1 and some 90 K broad around room temperature, was observed with a field change of Delta B = 0 to 7T for Fe-49(Rh0.97Pd0.03)(51). The specific heat data of Fe-49(Rh0.97Pd0.03)(51) made it possible to estimate the Delta T values for various external fields. This estimated value of Delta T compares well with the value measured directly using a thermocouple.

• 出版日期2008-8