Large magnetocaloric effect in Gd4Co3

Details Large magnetocaloric effect in Gd4Co3 Large magnetocaloric effect in Gd4Co3

2007-12-12

arxiv.org/abs/0712.1999v2

Physics

Condensed Matter

Strongly Correlated Electrons

Eur. Phys.J. B, in press

Scientific paper

We report a large entropy change (DeltaS) below 300 K, peaking near TC= 220
K, due to isothermal change of magnetic field, for Gd4Co3, with a refrigeration
capacity higher than that of Gd. Notably, the isothermal magnetization is
nonhysteretic - an important criterion for magnetic refrigeration without loss.
DeltaS behavior is also compared with that of magnetoresistance.

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