DocumentCode :
1320765
Title :
The Adiabatic Temperature Changes in the Vicinity of the First-Order Paramagnetic-Ferromagnetic Transition in the Ni-Mn-In-B Heusler Alloy
Author :
Dubenko, Igor ; Samanta, Tapas ; Quetz, Abdiel ; Kazakov, Alexander ; Rodionov, Igor ; Mettus, Denis ; Prudnikov, Valerii ; Stadler, Shane ; Adams, Philip W. ; Prestigiacomo, Joseph ; Granovsky, Alexander ; Zhukov, Arcady ; Ali, Naushad
Author_Institution :
Dept. of Phys., Southern Illinois Univ., Carbondale, IL, USA
Volume :
48
Issue :
11
fYear :
2012
Firstpage :
3738
Lastpage :
3741
Abstract :
The magnetocaloric properties of Ni-Mn-In-B Heusler alloy have been studied using direct measurements of the adiabatic temperature change (ΔTAD(T,H)) , and indirectly by magnetization (M(T,H)), differential scanning calorimetry, and specific heat (CP(T,H)) measurements. The presence of a first-order ferromagnetic-paramagnetic transition has been detected for Ni50Mn34.8In14.2B at 320 K. The magnetocaloric parameters, i.e., the magnetic entropy change, ΔSM = (2.9-3.2) J/kgK, and the adiabatic temperature change, ΔTAD = (1.3-1.52) K, have been evaluated for Δμ0H = 1.8 T from CP(T,H) and M(T,H), and from CP(T,H) and direct ΔTAD(T,H) measurements, respectively, in the vicinity of the first-order transition temperature. The extracted magnetocaloric parameters are comparable to that of Gd.
Keywords :
boron alloys; differential scanning calorimetry; entropy; ferromagnetic-paramagnetic transitions; indium alloys; magnetisation; magnetocaloric effects; manganese alloys; nickel alloys; specific heat; Heusler alloy; NiMnInB; adiabatic temperature changes; differential scanning calorimetry; first-order paramagnetic-ferromagnetic transition; magnetic entropy; magnetization; magnetocaloric properties; specific heat; temperature 320 K; Heating; Magnetic hysteresis; Manganese; Nickel; Temperature; Temperature measurement; First-order transition; Heusler alloys; magnetocaloric effect;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2012.2197596
Filename :
6332684
Link To Document :
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