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Título

Adiabatic measurement of the giant magnetocaloric effect in MnAs

AutorTocado, Leticia; Palacios, Elias; Burriel, Ramón
Palabras claveGiant magnetocaloric effect
Heat capacity
Heating and cooling curves
Magnetic phase diagram
Fecha de publicaciónabr-2006
EditorSpringer
CitaciónJournal of Thermal Analysis and Calorimetry 84(1): 213-217 (2006)
ResumenWe have studied the compound MnAs with a giant magnetocaloric effect, which has a magneto-structural transition at 316 K. The magnetic phase diagram has been deduced from adiabatic heat-capacity measurements and from cooling and heating curves. The ferroto paramagnetic transition changes with field from 316 K at 0 T to 335.3 K at 6 T. There is a strong thermal hysteresis between 10 and 5 K, depending on field. Direct measurements of the adiabatic temperature change caused by the application of magnetic field were made and compared with the values deduced from heat-capacity data.Moreover, adiabatic field cycles were performed quasi-statically between 0 and 6 T around the phase coexistence region, showing the strength of the effect in each phase and on the coexistence lines.
Descripción5 pages, 6 figures, 1 table.
Versión del editorhttp://dx.doi.org/10.1007/s10973-005-7180-z
URIhttp://hdl.handle.net/10261/19437
DOI10.1007/s10973-005-7180-z
ISSN1388-6150 (Print)
1572-8943 (Online)
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