Phase transitions, thermal, electrical, and magnetocaloric properties of Ni50Mn37-xAlxSn13 (x=2, 4) ribbon samples

2020 ◽  
Vol 842 ◽  
pp. 155783
Author(s):  
Adler Gamzatov ◽  
A.B. Batdalov ◽  
ShK. Khizriev ◽  
A.M. Aliev ◽  
L.N. Khanov ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetocaloric Properties

Magnetic Phase Transitions and Magnetocaloric Properties of Gd5Si0.4In3.6 Compound

2013 ◽  
Vol 320 ◽  
pp. 67-71
Author(s):  
Chao Jing ◽  
X.L. Wang ◽  
D.H. Yu ◽  
Y.J. Yang ◽  
B.J. Kang ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Entropy Change ◽  
Magnetic Phase ◽  
Entropy Change ◽  
Ferromagnetic State ◽  
Order Transition ◽  
Magnetic Phase Transitions ◽  
Magnetocaloric Properties ◽  
Second Order Transition ◽  
First Order Transition

The magnetic phase transitions and magnetocaloric properties of Gd5Si0.4In3.6 compound have been investigated. Magnetothermal measurements performed at different conditions reveal that the sample undergoes two magnetic phase transitions. One is a second-order transition from paramagnetic to ferromagnetic state at about 197 K, the other is a first-order transition when the temperature is reduced to 75 K. The magnetocaloric effect around Curie temperature (TC) was calculated in terms of isothermal magnetic entropy change by using Maxwells equation,which remains over a quite wide temperature span of 70 K between the temperature region from160 to 240 K, and thus makes this material attractive for magnetic refrigerator applications.

scholarly journals The influence of Au substitution and hydrostatic pressure on the phase transitions and magnetocaloric properties of MnCoGe alloys

2020 ◽  
Vol 127 (21) ◽  
pp. 213901
Author(s):  
Jing-Han Chen ◽  
Aaron Trigg ◽  
Tej Poudel Chhetri ◽  
David P. Young ◽  
Igor Dubenko ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Hydrostatic Pressure ◽  
Magnetocaloric Properties

scholarly journals Magnetocaloric properties of the single crystal Mn0.99Fe0.01As

2019 ◽  
Vol 55 (1) ◽  
pp. 118-124
Author(s):  
G. A. Govor ◽  
A. O. Larin ◽  
V. I. Mitsiuk ◽  
G. S. Rimskiy ◽  
T. M. Tkachenkа
Keyword(s):  
Magnetic Field ◽  
Crystal Structure ◽  
Phase Transition ◽  
Phase Transitions ◽  
External Magnetic Field ◽  
Single Crystal ◽  
Single Crystals ◽  
Calculation Method ◽  
Magnetostructural Transition ◽  
Magnetocaloric Properties

The Stockbargard – Bridgman method yielded single crystals Mn0.99Fe0.01As. The effect of an external magnetic field with an intensity of up to 10 T on phase transitions in the single crystal Mn0.99Fe0.01As is studied. It is established that the magnetostructural phase transition in Mn0.99Fe0.01As is accompanied by a change in the entropy ΔSm, which is due to the transformation of the crystal structure. At temperatures above the temperature of the magnetostructural transition Tu = 290 K, the existence of an unstable magnetic structure is obtained. The magnetocaloric characteristics of the material under study are determined by an indirect calculation method based on the Maxwell thermodynamic relations and the Clapeyron – Clausius equation.

Effect of Boron addition on the microstructure, phase transitions and magnetocaloric properties in Gd-Si-Ge alloy

2018 ◽  
Vol 96 ◽  
pp. 18-24 ◽  
Author(s):  
K. Prabahar ◽  
N. Pavan Kumar ◽  
D.M. RajKumar ◽  
S. Arumugam ◽  
M. Manivel Raja
Keyword(s):  
Phase Transitions ◽  
Boron Addition ◽  
Magnetocaloric Properties

Effect of post-annealing on the phase transitions and magnetocaloric properties in bulk Ni44Mn45Sn11 alloy

2013 ◽  
Vol 113 (17) ◽  
pp. 17A936 ◽  
Author(s):  
R. L. Wang ◽  
L. S. Xu ◽  
H. B. Xiao ◽  
L. F. Xu ◽  
J. X. Zhang ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Post Annealing ◽  
Magnetocaloric Properties

scholarly journals Теоретический подход к исследованию магнитных и магнитокалорических свойств сплавов Гейслера Ni-Mn-Ga

2020 ◽  
Vol 62 (5) ◽  
pp. 697
Author(s):  
О.Н. Мирошкина ◽  
В.В. Соколовский ◽  
М.А. Загребин ◽  
С.В. Таскаев ◽  
В.Д. Бучельников
Keyword(s):  
Phase Transitions ◽  
Heusler Alloys ◽  
Mean Field Theory ◽  
Mean Field ◽  
Magnetic Ordering ◽  
Entropy Change ◽  
Martensitic Transition ◽  
Magnetocaloric Properties ◽  
Temperature Dependences ◽  
First Order Phase

The study of the magnetic and magnetocaloric properties of Ni2+xMn1-xGa (x = 0.16, 0.18 and 0.3) Heusler alloys are presented. The research was performed using a model based on the Malygin theory of smeared phase transitions, Bean–Rodbell theory of first-order phase transitions, and mean-field theory. The temperature dependences of deformation, magnetization, and isothermal entropy change are studied. It is shown that the largest change in magnetic entropy is observed in the Ni2.18Mn0.82Ga alloy, in which the martensitic transition is accompanied by a change in magnetic ordering. The smallest change in entropy is demonstrated by the Ni2.3Mn0.7Ga alloy, in which magnetocaloric the effect is observed in the martensitic phase upon a change in magnetic ordering. However, the refrigeration capacity of this alloy is twice as much as for the other considered compositions.

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