Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of Nd_0.6Sr_0.4MnO₃manganite

Abstract

The relative cooling power is around 95.271 J kg−1 for NSMO-AC and 202.054 J kg−1 for NSMO-SG at μ0H = 5 T, making these materials potential candidates for magnetic refrigeration application near room temperature.

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in FexTi2S4 heideite sulphides

“…The RCP maximum ∆𝑆 𝑚𝑎𝑥 value for a magnetic field change of 7 T was found to be 135.3, 124.5, and 96.0 J.kg -1 for the x = 0.24, 0.32 and 0.42 samples, respectively. Particularly, at 5 T these values reach about 23% of that estimated in pure gadolinium (Gd) 57 . On the other hand, our RCP values are close or greater than that recently observed by Massoudi et al 52 for the Ni 0.6 Zn 0.4 Al 0.5 Fe 1.5 O 4 spinel with RCP ≈ 70 J.kg -1 (at 5T).…”

Magnetocaloric Effect, Dielectric Relaxor Behavior, and Evidence for Direct Magnetodielectric Behavior in Ni0.6Zn0.4Al0.5Fe1.5O4 Ceramics for High-Temperature Applications

“…Besides, to the value of magnetic entropy change, the RCP is one of the most significant parameters in MCE. The product of the Δ S M maximum and the full-width at half maximum δ TFWHM is straightforward to calculate . In order to probe the magnetocaloric efficiency of this sample, the RCP has been calculated by the following equation where −Δ S M max is the peak maximum magnetic entropy change and δ TFWHM is the magnetic entropy change curve’s whole width at half maximum.…”

“…The product of the ΔS M maximum and the full-width at half maximum δ TFWHM is straightforward to calculate. 7 In order to probe the magnetocaloric efficiency of this sample, the RCP has been calculated by the following equation…”

“…Among all these technology applications, magnetic refrigeration application is one of the most promising ones. A large study has been dedicated to ceramic ferrite in the magnetic refrigeration technology (MCE). , It is a cost-effective and environment friendly technology based on the concept of the magnetocaloric effect (MCE) alternative to the conventional gas compression/expansion system. , The MCE is defined as a magneto-thermodynamic phenomenon in which a temperature change in the magnetic material occurs as a result of varying the magnetic field. − MCE is defined as the tendency of a magnetic system to cool down or heat up through a magnetization–demagnetization process . The applied significance of the MCE is easily evaluated and successfully used to reach ultralow temperatures in a research environment .…”

“…4,5 It is a costeffective and environment friendly technology based on the concept of the magnetocaloric effect (MCE) alternative to the conventional gas compression/expansion system. 6,7 The MCE is defined as a magneto-thermodynamic phenomenon in which a temperature change in the magnetic material occurs as a result of varying the magnetic field. 7−9 MCE is defined as the tendency of a magnetic system to cool down or heat up through a magnetization−demagnetization process.…”