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Direct in situ study of magnetocaloric effect and martensitic twins structure of Ni-Mn-Ga Heusler alloy in high magnetic fields up to 14T.
Number: pap. 175
Author(s) : KOSHKID'KO Y. S., DILMIEVA E. T., CWIK J., et al.
Summary
This work reports the results of the experimental studies of magnetocaloric effect (MCE) in Ni2.16Mn0.84Ga Heusler alloy with separate magnetic and structural phase transitions in adiabatic (?T) and quasi isothermal (?Q) regimes by direct methods in magnetic fields up to 10 T. The data obtained allow for comparing ?T and ?Q values in the vicinity of martensitic transition and Curie point. It is found maximal values of ?T = 4,7 K at T = 311 K and ?Q = 4,6 kJ/kg at T = 313 K in the fields H = 10 T. Optical observations of martensitic twins structure origin and evolution under the influence of high magnetic field confirm the reversible magnetic-field-induced martensitic transition at constant temperature T = 313 K in the field 14 T.
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- Original title: Direct in situ study of magnetocaloric effect and martensitic twins structure of Ni-Mn-Ga Heusler alloy in high magnetic fields up to 14T.
- Record ID : 30019354
- Languages: English
- Source: 7th International Conference on Magnetic Refrigeration at Room Temperature (Thermag VII). Proceedings: Turin, Italy, September 11-14, 2016.
- Publication date: 2016/09/11
- DOI: http://dx.doi.org/10.18462/iir.thermag.2016.0175
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