Magnetic refrigeration based on the magnetocaloric effect (MCE) is an environment-friendly, high-efficiency technology. It has been believed that a large MCE can be realized in the materials with a first-order magnetic transition (FOMT). Here, we found that TlFeTe is a ferromagnetic metal with a first-order magnetic transition occurring at Curie temperature T = 220 K. The maximum values of magnetic entropy change (Δ) along the crystallographic c-axis, estimated from the magnetization data, reach to 5.9 J kgK and 7.0 J kg K for the magnetic field changes, ΔH = 0-1 T and 0-2 T, respectively, which is significantly larger than that of MCE materials with a second-order magnetic transition (SOMT). Besides the large ΔS, the low-level both thermal and field hysteresis make TlFeTe compound an attractive candidate for magnetic refrigeration. Our findings should inspire the exploration of high performance new MCE materials.
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| http://dx.doi.org/10.1038/srep34235 | DOI Listing |
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