Martensitic transformation hysteresis in Ni(Co)-Mn-Sn/MgO metamagnetic shape memory thin films
| Autor: | Steffen Salomon, Peer Decker, Alfred Ludwig, Volodymyr A. Chernenko, I. R. Aseguinolaza, J.M. Barandiarán, V. Alexandrakis |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Work (thermodynamics) Materials science Condensed matter physics Mechanical Engineering Metals and Alloys 02 engineering and technology Shape-memory alloy 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hysteresis Lattice constant Mechanics of Materials Martensite Diffusionless transformation 0103 physical sciences Magnetic refrigeration General Materials Science Thin film 0210 nano-technology |
| Zdroj: | Scripta Materialia. 156:101-104 |
| ISSN: | 1359-6462 |
| Popis: | Hysteresis of martensitic transformations (MTs) is a crucial factor which affects the efficiency and lifetime of actuators and magnetocaloric devices. In the present work we found a tenfold reduction of the thermal hysteresis of MT caused by increasing the MT temperature in a series of Ni(Co)-Mn-Sn thin films deposited onto MgO (001). We have observed that this evolution is accompanied by a drastic change of the temperature dependence of the lattice parameter in the temperature interval of MT. Such a behaviour can be interpreted using the concept of the critical state, where an anhysteretic behaviour is expected. |
| Databáze: | OpenAIRE |
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