Millisecond direct measurement of the magnetocaloric effect of a fe2p-based compound by the mirage effect
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Data
2016
Autores
Cugini, F.
Porcari, G.
Viappiani, C.
Caron, L.
dos Santos, A. O.
Cardoso, L. P.
Passamani, E. C.
Proveti, J. R. C.
Gama, Sergio [UNIFESP]
Bruck, E.
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We present direct measurements of the magnetocaloric effect on a Fe2P-based compound induced by a milliseconds pulsed magnetic field of 1 T to test their possible use in high frequency (up to 100 Hz) thermomagnetic cycles. The reported measurements were performed with an innovative and versatile non-contact set up based on the mirage effect. The adiabatic temperature change of a MnFeP0.45As0.55 sample is presented and compared with measurements performed varying the same magnetic field in a time interval of 1 s and 100 ms. These results demonstrate the absence of kinetic constraints in the first-order phase transition of this sample induced on the milliseconds time scale. The study of the materials' response to millisecond magnetic field pulses represents a fundamental test for the development of more powerful and efficient magnetic refrigerators. (C) 2016 AIP Publishing LLC.
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Applied Physics Letters. Melville, v. 108, n. 1, 2016.