Title :
The Magnetocaloric Effect of Heusler Microwires in Low and High Magnetic Fields
Author :
Ryba, T. ; Vargova, Z. ; Varga, R. ; Zhukova, V. ; Zhukov, A.
Author_Institution :
Inst. of Ph.ys., UPJS, Kosice, Slovakia
Abstract :
We are dealing with the influence of Hopkinson effect on magnetocaloric effect in glass-coated Ni-Mn-In-Co microwires in the given contribution. We have shown that although the entropy change is smaller in low fields, the refrigerant capacity per unit of applied field is three times higher for low field (300 Oe) comparing to that of 30 kOe. This points to the fact that Hopkinson effect can be employed to increase the efficiency of magnetocaloric effect.
Keywords :
cobalt alloys; entropy; indium alloys; magnetic cooling; manganese alloys; nickel alloys; Heusler microwires; Hopkinson effect; NiMnInCo; entropy; glass-coated microwires; high magnetic fields; low magnetic fields; magnetocaloric effect; refrigerant capacity; Magnetic hysteresis; Magnetization; Magnetomechanical effects; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature measurement; Entropy change; Heusler alloys; magnetic microwire; magnetocaloric effect;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2218225
