Metamagnetism-enhanced magnetocaloric effect in the rare earth intermetallic compound Ho5Ge4статья
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Дата последнего поиска статьи во внешних источниках: 26 сентября 2016 г.
Аннотация:Magnetic and magnetocaloric properties of polycrystalline Ho5Ge4 (orthorhombic, Sm5Ge4-type, Space group Pnma, No.62, oP36) compound have been studied. This compound orders antiferromagnetically at 24 K (TN). From the magnetization vs field isotherms obtained close to the magnetic transition temperature, magnetocaloric effect (MCE) has been estimated. The isothermal magnetic entropy change (ΔSM) reaches amaximum value of -27 J/kg-K at 30 K for a field change of 140 kOe. A metamagnetic transition is observed in the field dependent magnetization data at temperatures below 20K, for critical fields above 20 kOe, giving rise to a ferromagnetic order and hence a large MCE. Themagnetic moment value at 2.5 K is 8μB/Ho in 90kOe field.