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

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...

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Bibliographic Details
Published in:Applied physics letters 2016-01, Vol.108 (1)
Main Authors: Cugini, F., Porcari, G., Viappiani, C., Caron, L., dos Santos, A. O., Cardoso, L. P., Passamani, E. C., Proveti, J. R. C., Gama, S., Brück, E., Solzi, M.
Format: Article
Language:English
Subjects:
Applied physics
Magnetic fields
Magnetism
Phase transitions
Refrigerators
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4939451