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.
Millisecond direct measurement of the magnetocaloric effect of a Fe2P-based compound by the mirage effect / Cugini, Francesco; Porcari, Giacomo; Viappiani, Cristiano; Caron, L.; dos Santos, A. O.; Cardoso, L. P.; Passamani, E. C.; Proveti, J. R. C.; Gama, S.; Brück, E.; Solzi, Massimo. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 108:1(2016), pp. 012407-1-012407-4. [10.1063/1.4939451]
Millisecond direct measurement of the magnetocaloric effect of a Fe2P-based compound by the mirage effect
CUGINI, FRANCESCO;PORCARI, Giacomo;VIAPPIANI, Cristiano;SOLZI, Massimo
2016-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
