Magnetocaloric effect in preferentially textured Mn50Ni40In10 melt spun ribbons

Inverse and direct magnetocaloric properties were evaluated in preferentially textured Mn50Ni40In10 ribbons applying the magnetic field H-parallel to along the ribbon length and perpendicular H-perpendicular to to the ribbon plane (Delta H= 30 kOe). Maximum magnetic entropy change, hysteretic losses, and refrigerant capacity were not significantly affected by crystallographic texture. Refrigeration capacity around structural transition is strongly reduced by the large hysteretic losses associated to the metamagnetic field-induced reverse martensitic transformation and narrower working temperature range making the interval around the magnetic transition more efficient for a refrigerant cycle (RCstruct=71 J kg(-1) versus RCeffstruct approximate to 60 J kg(-1), and RCmagn= 89-86 J kg(-1), for H-parallel to and H-perpendicular to, respectively). (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3147875]