Search

In this investigation, it is used a phenomenological model to predict the thermomagnetic properties through making simulation of experimental isofield thermo-magnetization curve for Sc doped Th2NiC2 superconductors. Consequently, the magnetocaloric effect (MCE) of Sc doped Th2NiC2 superconductors, in the vicinity of superconducting phase transition, is simulated, calculating MCE parameters. The results show that MCE of Sc doped Th2NiC2 superconductors are inverse type in temperature range of superconducting phase transition. The behavior of MCE in Th1.9Sc0.1NiC2 and Th1.8Sc0.2NiC2 samples recommends that they can fruitfully be utilized as very low-temperature magnetic refrigerants between 7 and 11 K especially in radiation detectors for outer space research. [ABSTRACT FROM AUTHOR]

The magnetocaloric effect (MCE) of NaFeO2 nanoparticles has been investigated by phenomenological model (PM). The simulated temperature-dependent magnetization data are in good agreement with the experimental one. Based on PM, the MCE parameters obtained as results of simulation for temperature-dependent magnetization data. Furthermore, the simulation shows that NaFeO2 nanoparticles have a prospective importance in magnetic refrigerants over a wide temperature range, including room temperature. This gives NaFeO2 nanoparticles potentially practical for MR. [ABSTRACT FROM AUTHOR]

The effect of trivalent ions (Al3+, Bi3+, and Mn3+) substitutions on magnetocaloric effect (MCE) of M-type ferrite BaFe12O19 (BaM) has been investigated by a phenomenological model. It is shown that the presence of Al3+, Bi3+, and Mn3+ ions in BaM makes remarkable variations for MCE. It is concluded that MnBaFe11O19 is more practical than BaM, BiBaFe11O19, and AlBaFe11O19 due to a larger MCE, and its Curie temperature is closer to room temperature. MCE of BaM can be tuning with remarkable values by doping suitable ions. [ABSTRACT FROM AUTHOR]