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The Ho-Co-In alloy was thoroughly studied for its magnetic and magnetocaloric properties, revealing a dual-phase structure comprising cubic HoCo2 and an unidentifiable phase, with stoichiometry HoCo1.5In0.33. At distinct temperatures, T1 = 123 K and T2 = 34 K, the alloy showcased ferromagnetic behavior, while transitioning to antiferromagnetic ordering at T3 = 7 K. The ferromagnetic shifts were determined to be of second-order nature, displaying minimal magnetic hysteresis. The magnetocaloric effect (MCE) was computed using Maxwell’s equations based on isothermal magnetization data. Because of multi-phase nature, the alloy’s multiple magnetic transitions gave rise to twin peaks in the MCE graph, reaching relative cooling power (RCP) value of 595 J/kg for an applied magnetic field change of 0–9 T. Furthermore, the alloy showcased a notable maximum magnetoresistance, registering at -15% around 123 K. These findings shows the alloy’s intricate magnetic behavior and its potential for diverse applications owing to its distinct magnetocaloric and magnetoresistive properties. [ABSTRACT FROM AUTHOR]

Magnetic, magnetocaloric, and magnetoresistance properties of polycrystalline Tb2Ni0.94Si3.2 alloy have been investigated. Magnetic susceptibilities (AC and DC), remanent magnetization and the heat capacity studies of Tb2Ni0.94Si3.2 provide evidence for the spin glass behavior below the temperature, Tf = 5.2 K. At the Néel temperature, TN = 12.7 K, Tb2Ni0.94Si3.2 alloy orders antiferromagnetically. The presence of metamagnetic transition is observed in isothermal magnetization and magnetoresistance studies. Also, a magnetoresistance of 22% is exhibited by the alloy at temperature T = 4 K in an applied magnetic field of 9 T. A magnetic entropy change of 12 J/kg K with the relative cooling power of 504 J/kg for a magnetic field change of 9 T is observed in the studied alloy. Influence of spin fluctuations and short-range ferromagnetic correlations is reflected in magnetoresistance and relative cooling power. The magnetic and magnetoresistance properties make this alloy as a good magnetocaloric material with moderate magnetoresistance. [ABSTRACT FROM AUTHOR]