Anomalous field dependence of the inverse magnetocaloric effect in Ce(Fe0.93Ru0.07)2

Structural phase coexistence and magnetocaloric effect in fast‐neutron‐irradiated Ce(Fe0.96Ru0.04)2 intermetallic compound

“…Jiang et al describes the broadening in width and low‐field variation of the magnitude as anomalous in their conclusion in Ce(Fe 0.93 Ru 0.07 ) 2 system not in full agreement with the model provided by Pecharsky et al that is based on a general thermodynamic approach . In our case we correlate the reduction in magnetic entropy with the incomplete structural transition associated with the nucleation of FM domains nucleated around the induced disorders.…”

“…This field‐induced structural transition (FIST) puts substituted CeFe 2 in contrast to pure CeFe 2 . In the latter case MCE is positive, whereas in substituted material it is of opposite sign ( i.e ., a negative temperature change under application of a magnetic field) and is known as the inverse MCE . Quite often in materials exhibiting FIST, magnetic entropy has a significant contribution from the associated structural changes.…”

Studies on the field-induced martensite to austenite phase transition in Ni50Mn34In16alloy

“…The negative slope of H /M versus M 2 isotherms in such systems is found to decrease gradually as T approaches the zero-field transition temperature [3][4][5][6][7]. Such a decrease in the magnitude of the negative slope of H /M versus M 2 isotherms is also observed across the fieldinduced first-order antiferromagnetic to ferromagnetic phase transition [8]. On the other hand, the absence of negative slope of H /M versus M 2 isotherms across a field-induced first-order magnetic transition, as observed here, is also visible in certain compositions of ferromagnetic shape memory alloy Ni-Mn-Ga [9], and in another member of the Ni-Mn-In alloy system, namely Ni 50 Mn 35 In 15 [33].…”

“…It was found that a positive slope of the H /M versus M 2 isotherm is related to the second-order magnetic transition, while a negative slope corresponds to the first-order magnetic transition. This criterion [2] has been employed for the identification of the order of the magnetic transitions in MnAs [2], various manganite systems [3][4][5][6][7] and Ru-doped CeFe 2 [8]. The same criterion has also been used to investigate the magnetic transitions in the ferromagnetic shape memory alloy system NiMnGa [9].…”

First order magneto-structural phase transition and associated multi-functional properties in magnetic solids

“…An inverse magneto-caloric effect (MCE) associated with the FM-AFM transition has been observed in Ru, Al and Ga-doped CeFe 2 alloys, apart from a conventional MCE at the higher temperature PM-FM transition [66][67][68][69]. In contrast to cooling by adiabatic demagnetization, cooling by adiabatic magnetization i.e.…”