Large magnetoresistance associated with large inverse magnetocaloric effect in Ni-Co-Mn-Sn alloys
Magnetism Laboratory, Department of Condensed Matter
Physics and Material Sciences, S.N.
Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt
Received in final form: 2 July 2013
Published online: 11 September 2013
Structural and magnetic transitions of Ni47.5-xCoxMn37.5Sn15 (x = 0, 1, 2 and 3.5) alloys were confirmed and studied by magnetic and resistivity measurements. Though a large magnetic entropy change (ΔSM) ~ 9.5 J/kg K was obtained for x = 3.5 due to a change of only 1.5 T magnetic field, hysteresis losses limited its refrigerant capacity to a significant extent. A maximum –69% magnetoresistance was obtained due to a structural transition in the same sample in presence of 8 T field. It was found that the same material can be used for practical applications within a wide range of temperature as it shows large magnetoresistance at remote temperatures far below from its structural transition point.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013