Enhanced refrigerant capacity and magnetic entropy flattening using a two-amorphous FeZrB(Cu) composite

TL;DR

This study demonstrates that a two-amorphous FeZrB(Cu) composite enhances refrigerant capacity and flattens magnetic entropy change over a broad temperature range, improving magnetic refrigeration efficiency.

Contribution

It introduces a novel composite system that significantly improves magnetic refrigerant properties compared to individual alloys.

Findings

Maximum improvement in {}SM(T) width by 47% at xa0bc0.5.

Refrigerant capacity increased by up to 23%.

Flattening of {}SM(T) over 80 K around room temperature.

Abstract

The temperature dependence of the isothermal magnetic entropy change, {\Delta}SM, and the magnetic field dependence of the refrigerant capacity, RC, have been investigated in a composite system xA+(1-x)B, based on Fe87Zr6B6Cu1 (A) and Fe90Zr8B2 (B) amorphous ribbons. Under a magnetic field change of 2 T the maximum improvement of the full-width at half maximum of {\Delta}SM(T) curve (47 and 29 %) and the RC (18 and 23 %), in comparison with those of the individual alloys (A and B), is observed for x \approx 0.5. Moreover, a flattening over 80 K in the {\Delta}SM(T) curve around room temperature range is observed, which is a key feature for an Ericsson magnetic refrigeration cycle.