Thermomagnetic and magnetocaloric properties of metamagnetic Ni-Mn-In-Co Heusler alloy in magnetic fields up to 140 kOe

Alexander Kamantsev, Victor Koledov, Elvina Dilmieva, Alexey Mashirov, Vladimir Shavrov, Jacek Cwik, Irina Tereshina, Vladimir Khovaylo, Maria Lyange, Lorena Gonzalez-Legarreta, Blanca Hernando, Pnina Ari-Gur (+3 others)
2014 EPJ Web of Conferences  
High cooling power of magnetocaloric refrigeration can be achieved only at large amounts of heat, which can be transferred in one cycle from cold end hot end at quasi-isothermal conditions. The simple and robust experimental method of direct measuring of the transferred heat of materials with magnetocaloric effect (MCE) in thermal contact with massive copper block with definite heat capacity in quasi-isothermal regime was proposed. The vacuum calorimeter for the specific transferred heat ∆Q and
more » ... sferred heat ∆Q and adiabatic temperature change ∆T measurements of MCE materials in the fields of Bitter coil magnet up to H = 140 kOe was designed and tested on samples of Ni 43 Mn 37.9 In 12.1 Co 7 Heusler alloy with inverse MCE in the vicinity of meta-magnetostructural phase transition (PT). It was found, that the magnetic field H = 80 kOe produces complete PT from martensite to austenite with ∆Q = -1600 J/kg at initial temperature 273 K. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
doi:10.1051/epjconf/20147504008 fatcat:arhziffb6zfobl2ha7txjrrpum