Martensitic transition and inverse magnetocaloric effect in Co doping Ni–Mn–Sn Heulser alloy

Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys

“…These results were supported by high resolution transmission electron microscopy (HRTEM). Furthermore, it was also found that the partial substitution of Ni by Co shifts the martensitic transformation to lower temperatures in Ni-Mn-Sn-Co bulk alloys [21]. If our alloys have the same trend that bulk alloys (Figure 9), it is not clear the occurrence of the magnetic transformation.…”

Magnetic-Field-Induced Effects in Martensitic Heusler-Based Magnetic Shape Memory Alloys

“…However, fields of about 7 T are required to induce a reverse martensitic transformation. Jing et al (2009b) have introduced Co into the Ni-Mn-Sn system (Ni 50Àx-Co x Mn 38 Sn 12 ) (x ¼ 2, 4, 6) and found strong enhancement in the inverse MCE up to about 35 Jkg À 1 K À 1 in 5 T, particularly in the composition with x ¼ 2, as well as a field-induced reverse martensitic transformation around 3 T. Here also, as in the case of Ni-Mn-Ga, the MCE reaches the highest values when T C A and M s nearly coincide. Replacing Ni partially with Co in Ni-Mn-Sb is also found to enhance the inverse MCE.…”

Analysis of the Magnetocaloric Effect in Heusler Alloys: Study of Ni50CoMn36Sn13 by Calorimetric Techniques

“…We chose the value z = 12 in order to get T M C < M f . On the other hand, the addition of a small amount of Co increases T A C and decreases M s and M f [11,12]. The parameter y = 1 has been chosen with the aim of having Figure 1).…”