Magnetocaloric Effect in Amorphous and Nanocrystalline FeCrNbBCu Alloys

Jozef Ková?; Peter ?vec; Ivan ?korvánek

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Magnetocaloric Effect in Amorphous and Nanocrystalline FeCrNbBCu Alloys

机译：非晶态和纳米晶态的FeCrNbBCu合金的磁热效应

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The magnetocaloric effect in series of amorphous and nanocrystalline Fe_73.5Cr₅Nb_4.5B₁₆Cu and Fe₇₂Cr₈Nb₃B₁₆Cu samples has been studied by evaluating the magnetic entropy changes, ΔS_m, from magnetization data. An addition of different amount of chromium to the FeNbBCu and the subsequent heat treatment were used to shift the Curie temperature of amorphous phase, T_C(am), to the vicinity of room temperature. Upon a 0.6 T magnetic field change, the maximum entropy change ΔS_m≈ 0.5 J/kgK is found at the Curie temperature T_C(am) ≈ 310 K of the amorphous Fe₇₂Cr₈Nb₃B₁₆Cu alloy. Hence, the FeCrNbBCu alloys could be considered as potential low cost magnetic refrigerants near room temperature.

机译：非晶和纳米晶Fe _{73.5 Cr _{5 Nb _{4.5 B _{16 Cu和Fe m，研究了> 72 Cr _{8 Nb _{3 B _{16 Cu样品，来自磁化数据。向FeNbBCu中添加不同量的铬并随后进行热处理，以将非晶相的居里温度T _{C （am）移至室温附近。在0.6 T磁场变化下，在非晶态的居里温度T _{C （am）≈310 K时，发现最大熵变化ΔS_{m ≈0.5 J / kgK Fe _{72 Cr _{8 Nb _{3 B _{16 Cu合金。因此，FeCrNbBCu合金可被视为接近室温的潜在低成本磁性制冷剂。}}}}}}}}}}}}}}

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《Reviews on Advanced Materials Science》 |2008年第6期|共3页
作者
Jozef Ková?; Peter ?vec; Ivan ?korvánek;
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Magnetocaloric Effect in Amorphous and Nanocrystalline FeCrNbBCu Alloys

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