Millisecond direct measurement of the magnetocaloric effect of a Fe2P-based 
compound by the mirage effect

Cugini, F.; Porcari, G.; Viappiani, C.; Caron, L.; dos Santos, A. O.; Cardoso, L. P.; Passamani, E. C.; Proveti, J. R. C.; Gama, S.; Bruck, E.; Solzi, M.

doi:10.1063/1.4939451

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Millisecond direct measurement of the magnetocaloric effect of a Fe₂P-based compound by the mirage effect

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Caron, L.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Cugini, F., Porcari, G., Viappiani, C., Caron, L., dos Santos, A. O., Cardoso, L. P., et al. (2016). Millisecond direct measurement of the magnetocaloric effect of a Fe₂P-based compound by the mirage effect. Applied Physics Letters, 108(1): 012407, pp. 1-4. doi:10.1063/1.4939451.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002A-C5E9-0

Zusammenfassung

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.