The magnetocaloric effect and critical behavior in amorphous Gd60Co40−xMnx alloys

Abstract

Articles you may be interested inMagnetic behavior and magnetocaloric effect of neodymium-based amorphous alloy

Critical behavior of Nd0.67Ba0.33Mn1−xFexO3 (x=0 and 0.02) manganites

“…Physically, β describes how the ordered moment grows below T C , while γ describes the divergence of the magnetic susceptibility at temperatures above T C[31].For x= 0 sample, values of β= 0.326 and γ= 1.244 are close to the 3D-Ising model, whereas for x= 0.02 sample, the values of β= 0.509 and γ= 1.140 are close to the mean-field theory. The result implies that an addition of Fe to Nd 0.67 Ba 0.33 MnO 3 changes the Mn 3+ /Mn 4+ ratio.…”

Effect of synthesis techniques on structural, magnetocaloric and critical behavior of Pr0.6Ca0.1Sr0.3Mn0.975Fe0.025O3 manganites

“…Physically, the critical exponent β describes how the ordered moment grows below T C . γ describes the divergence of the magnetic susceptibility above T C [49]. …”

Magnetocaloric effect and critical behavior of Ni7Cu3 alloys

“…is depicted in Fig .4. It is widely accepted that the negative slopes or inflection points in the Arrott plots are related to first-order magnetic transition, while the positive slope and linear behavior near Tc often mean that the phase transition is second-order phase transition [7,11] . Neither inflection nor a negative slope in the Arrott plot of Ni 7 Cu 3 is observed near the T C in Fig .4, which indicates that the alloy undergos a second-order magnetic transition.…”

“…In recent years, MCE has been found in various intermetallic alloys, such as Gd 5 Si 2 Ge 2 [1] , La(Fe,Si) 13 [2,3] , MnAs 1-x Sb x [4] , MnFeP 1-x Si x [5] , Ni-Mn-In [6] and amorphous alloys Gd 60 Co 40-x Mn x [7] . Much recently, Ni-Cu alloys have been paid more and more attention because of their interesting physical properties and functionalities such as magnetic recording media, magnetic sensors, giant magnetoresistance and microelectromechanical systems.…”