Dynamics of the magnetoelastic phase transition and adiabatic temperature change in Mn1.3Fe0.7P0.5Si0.55
| Autor: | J. Wosnitza, Michael Farle, Oliver Gutfleisch, Lukas Pfeuffer, Mehmet Acet, I. Skourski, Franziska Scheibel, Tino Gottschall, Konstantin P. Skokov, Maximilian Fries |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Phase transition Materials science Field (physics) Condensed matter physics Magnetic moment Alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Paramagnetism Hysteresis 0103 physical sciences engineering Magnetic refrigeration 0210 nano-technology Adiabatic process |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 477:287-291 |
| ISSN: | 0304-8853 |
| Popis: | The adiabatic temperature change ΔTad of a Mn1:3Fe0:7P0:5Si0:55 Fe2P-type alloy was measured under different magnetic field-sweep rates from 0:93 Ts-1 to 2870 Ts-1. We find a field-sweep-rate independent magnetocaloric effect due a partial alignment of magnetic moments in the paramagnetic region overlapping with the magnetocaloric effect of the first-order phase transition. Additionally, the first-order phase transition is not completed even in fields up to 20T leading to a non-saturating behavior of ΔTad. Measurements in different pulsed fields reveal that the first-order phase transition cannot follow the fast field changes as previously assumed, resulting in a distinct field-dependent hysteresis in ΔTad. |
| Databáze: | OpenAIRE |
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