Effect of heat treatment on microstructure evolution and magnetocaloric properties of droplet melted Mn–Fe–P–Si alloys

Study on the chemical co-precipitation synthesized CoFe2O4 nanoparticle for magnetocaloric performance in the vicinity of superparamagnetic blocking temperature

“…Numerous sources, including the aforementioned author's work, indicate that increasing the magnetic field strength can enhance our value of maximum entropy change. But Materials like Gd-Si-Ge, La–Fe–Si, Mn–Fe–P-X, and Heusler alloys exhibit substantial magnetocaloric effects (MCE) much better than present CoFe 2 O 4 NPs due to the combined contributions from structural and magnetic entropy changes [ [57] , [58] , [59] , [60] ]. Despite their potential for magnetic refrigeration, these materials often suffer from brittleness and functional fatigue due to volume changes during first-order phase transitions [ 61 ].…”

Enhanced Magnetocaloric Properties of Annealed Melt-Extracted Mn1.3Fe0.6P0.5Si0.5 Microwires

“…However, these methods usually require time-consuming heat treatment (from several hours to several days) for achieving homogeneous compositions and forming high fractions of the Fe 2 P phase [9]. Alternatively, rapid solidification techniques, such as melt spinning [15,16] and droplet melting [17,18], enable the fabrication of materials with excellent compositional homogeneity and reduced impurities after short-time heat treatment. In this way, melt-extraction as a rapid solidification technique has been proposed as a promising method to develop wire-shaped magnetocaloric materials as reported for meltextracted Gd-based microwires [19,20] and more recently high-entropy alloys [21,22], as well as medium-entropy alloys [23].…”