Hydrostatic pressure effect on the martensitic transition, magnetic, and magnetocaloric properties in Ni50-xMn37+xSn13 Heusler alloys

2011 ◽  
Vol 110 (8) ◽  
pp. 083902 ◽  
Author(s):  
S. Esakki Muthu ◽  
N. V. Rama Rao ◽  
M. Manivel Raja ◽  
S. Arumugam ◽  
K. Matsubayasi ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Pressure Effect ◽  
Heusler Alloys ◽  
Martensitic Transition ◽  
Magnetocaloric Properties

Hydrostatic pressure effects on martensitic transition, magnetic and magnetocaloric effect in Si doped Ni–Mn–Sn Heusler alloys

2014 ◽  
Vol 584 ◽  
pp. 175-179 ◽  
Author(s):  
S. Esakki Muthu ◽  
M. Kanagaraj ◽  
Sanjay Singh ◽  
P.U. Sastry ◽  
G. Ravikumar ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Magnetocaloric Effect ◽  
Heusler Alloys ◽  
Pressure Effects ◽  
Martensitic Transition ◽  
Si Doped

scholarly journals Martensitic Transformation, Thermal Analysis and Magnetocaloric Properties of Ni-Mn-Sn-Pd Alloys

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1582
Author(s):  
Asma Wederni ◽  
Mihail Ipatov ◽  
Eloi Pineda ◽  
Lluisa Escoda ◽  
Julian-Maria González ◽  
...  
Keyword(s):  
Structural Transition ◽  
Magnetic Measurements ◽  
Heusler Alloys ◽  
Martensitic Transition ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Enthalpy Changes ◽  
Magnetocaloric Properties ◽  
Pd Doping ◽  
Peak Value

Martensitic transition and magnetic response of Ni50−x Pdx,y Mn36 Sn14−y (x = 0, 1, 2 and y = 0, 1) Heusler alloys were analysed. The crystalline structure of each composition was solved by X-ray diffraction pattern fitting. For x = 1 and 2, the L21 austenite structure is formed and, for y = 1, the crystallographic phase is a modulated martensitic structure. From differential scanning calorimetry scans, we determine characteristic transformation temperatures and the entropy/enthalpy changes. The temperatures of the structural transformation increase with the addition of Pd to replace Ni or Sn, whereas the austenitic Curie temperature remains almost unvarying. In addition, the magneto-structural transition, investigated by magnetic measurements, is adjusted by suitable Pd doping in the alloys. The peak value of the magnetic entropy changes reached 4.5 J/(kg K) for Ni50Mn36Sn13Pd1 (external field: 50 kOe).

Investigation of the influence of hydrostatic pressure on the magnetic and magnetocaloric properties of Ni2−XMn1+XGa (X = 0, 0.15) Heusler alloys

2013 ◽  
Vol 114 (5) ◽  
pp. 053906 ◽  
Author(s):  
U. Devarajan ◽  
S. Esakki Muthu ◽  
S. Arumugam ◽  
Sanjay Singh ◽  
S. R. Barman
Keyword(s):  
Hydrostatic Pressure ◽  
Heusler Alloys ◽  
Magnetocaloric Properties

Effect of External Fields on the Martensitic Transformation in Ni-Mn Based Heusler Alloys

2008 ◽  
Vol 52 ◽  
pp. 189-197 ◽  
Author(s):  
Xavier Moya ◽  
Lluís Mañosa ◽  
Antoni Planes ◽  
Seda Aksoy ◽  
Mehmet Acet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hydrostatic Pressure ◽  
Martensitic Transformation ◽  
Applied Magnetic Field ◽  
Heusler Alloys ◽  
Applied Pressure ◽  
Large Change ◽  
Entropy Change ◽  
Martensitic Transition ◽  
External Fields

In this paper, we discuss the possibility of inducing a martensitic transition by means of an applied magnetic field or hydrostatic pressure in Ni-Mn based Heusler shape memory alloys. We report on the shift of the martensitic transition temperatures with applied magnetic field and applied pressure and we show that it is possible to induce the structural transformation in a Ni50Mn34In16 alloy by means of both external fields due to: (i) the low value of the entropy change and (ii) the large change of magnetization and volume, which occur at the martensitic transition.

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.

scholarly journals Magnetic and magnetocaloric properties of Ni-Mn-Cr-Sn Heusler alloys under the effects of hydrostatic pressure

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 056408 ◽  
Author(s):  
Sudip Pandey ◽  
Ahmad Us Saleheen ◽  
Abdiel Quetz ◽  
Jing-Han Chen ◽  
Anil Aryal ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Heusler Alloys ◽  
Magnetocaloric Properties

On the Broadening of the Martensitic Transition in Heusler Alloys: From Microscopic Features to Magnetocaloric Properties

JOM ◽  
2017 ◽  
Vol 69 (8) ◽  
pp. 1422-1426 ◽  
Author(s):  
F. Cugini ◽  
G. Porcari ◽  
T. Rimoldi ◽  
D. Orsi ◽  
S. Fabbrici ◽  
...  
Keyword(s):  
Heusler Alloys ◽  
Martensitic Transition ◽  
Magnetocaloric Properties ◽  
Microscopic Features
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