Magnetocaloric effect in ribbon samples of Heusler alloys Ni–Mn–M (M=In,Sn)

Abstract

Excellent magnetocaloric properties of melt-extracted Gd-based amorphous microwires Appl. Phys. Lett. 101, 102407 (2012) Adiabatic magnetocaloric temperature change in polycrystalline gadolinium -A new approach highlighting reversibility AIP Advances 2, 032149 (2012) Ni59.0Mn23.5In17.5 Heusler alloy as the core of glass-coated microwires: Magnetic properties and magnetocaloric effect J. Appl. Phys. 112, 033905 (2012) Critical behavior and magnetocaloric effect of Gd65Mn35−xGex (x=0, 5, and 10) melt-spun ribbons

Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons

“…While the occurrence of negative MR just above and below T C (A) in the austentite phase can be due to the suppression of s-d scattering by the external magnetic field, the existence of MR from T = T M to 10 K well within the ferromagnetic state indicates that the martensitic phase is not a homogeneous ferromagnet because of the presence of antiferromagnetic interactions between the Mn atoms present on the Sn sublattice and those on the Mn sublattice. [1][2][3]9 The value of M at 10 K and at 5 T is 36.44 emu/g which is only slightly higher than its peak value (33.94 emu/g) at T M . The 5 T field is insufficient to break the antiferromagnetic interaction in the martensitic phase.…”

“…The half Heusler alloys Ni 50 Mn 50−x Z x (Z = Sn, In and Sb), which combine magnetism and shape memory effect, are smart functional materials; they exhibit large values of magnetic field induced strain, 1,2 inverse magnetocaloric effect, 3,4 and magnetoresistance at the austentite-martensite phase transition temperature. The austenite (A) and martensite (M) states refer to the high temperature, high crystallographic symmetry (normally cubic) phase and low temperature, low symmetry (monoclinic/orthorhombic/tetragonal/modulated) phase, respectively.…”

Chemical Characterisation of Bulk and Melt-spun Ribbons of NiMnIn alloy using Inductively Coupled Plasma Optical Emission Spectrometry

“…These alloy systems have a unique combination of high strains, high actuation frequency (over 5kHz has been measured) and large energy densities, which make them potential materials for a variety of military and civilian applications. Envisaged defence applications include devices for vibration and signature control, energy harvesting, aerodynamic and hydrodynamic control systems, active shock amelioration systems, sonar devices and microactuators 6,7 in nose cones of propelled projectiles.…”

On the correct estimation of the magnetic entropy change across the magneto-structural transition from the Maxwell relation: Study of MnCoGeBx alloy ribbons

“…Among them, Gd 5 (Si x Ge 1-x ) 4 [1,16], La(Si,Fe,X) 13 (X= Co, Mn) [17,18], MnFe(P,X) with X = As, Ge, Si [6,19], non-stoichiometric NiMn-X-based Heusler-type (X= Ga, Sn, In, Sb) [20][21][22][23][24][25][26] or Mn(Co,Ni)Ge-based alloys [27][28][29][30][31][32][33][34][35][36][37]. It is worth noting that MnCoGe-based alloys have one of the largest contributions of S st to S T , giving rise to one of the highest reported GMCE in terms of the maximum value of S T [14].…”