Phase diagram and magnetocaloric effect of CoMnGe1−xSnx alloys
نویسندگان
چکیده
We propose the phase diagram of a new pseudo-ternary compound, CoMnGe1−xSnx, in the range x≤0.1. Our phase diagram is a result of magnetic and calometric measurements. We demonstrate the appearance of a hysteretic magnetostructural phase transition in the range x = 0.04 to x = 0.055, similar to that observed in CoMnGe under hydrostatic pressure. From magnetisation measurements, we show that the isothermal entropy change associated with the magnetostructural transition can be as high as 4.5 JK−1kg−1 in a field of 1 Tesla. However, the large thermal hysteresis in this transition (∼20 K) will limit its straightforward use in a magnetocaloric device.
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