The martensitic transition and magnetocaloric properties of Ni51Mn49−xSnx

2013 ◽  
Vol 412 ◽  
pp. 74-78 ◽  
Author(s):  
F.S. Liu ◽  
Q.B. Wang ◽  
S.P. Li ◽  
W.Q. Ao ◽  
J.Q. Li
Keyword(s):  
Martensitic Transition ◽  
Magnetocaloric Properties

scholarly journals The Effect of Different Atomic Substitution at Mn Site on Magnetocaloric Effect in Ni50Mn35Co2Sn13 Alloy

Crystals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 329 ◽  
Author(s):  
Chengfen Xing ◽  
Hu Zhang ◽  
Kewen Long ◽  
Yaning Xiao ◽  
Hanning Zhang ◽  
...  
Keyword(s):  
Magnetocaloric Effect ◽  
Parent Phase ◽  
Martensitic Transition ◽  
Martensitic Transformation Temperature ◽  
Low Field ◽  
Transition Metal Element ◽  
Magnetocaloric Properties ◽  
Metal Element ◽  
Mn Content ◽  
Atomic Substitution

The effect of different atomic substitutions at Mn sites on the magnetic and magnetocaloric properties in Ni50Mn35Co2Sn13 alloy has been studied in detail. The substitution of Ni or Co for Mn atoms might lower the Mn content at Sn sites, which would reduce the d-d hybridization between Ni 3d eg states and the 3d states of excess Mn atoms at Sn sites, thus leading to the decrease of martensitic transformation temperature TM in Ni51Mn34Co2Sn13 and Ni50Mn34Co3Sn13 alloys. On the other hand, the substitution of Sn for Mn atoms in Ni50Mn34Co2Sn14 would enhance the p-d covalent hybridization between the main group element (Sn) and the transition metal element (Mn or Ni) due to the increase of Sn content, thus also reducing the TM by stabilizing the parent phase. Due to the reduction of TM, a magnetostructural martensitic transition from FM austenite to weak-magnetic martensite is realized in Ni51Mn34Co2Sn13 and Ni50Mn34Co2Sn14, resulting in a large magnetocaloric effect around room temperature. For a low field change of 3 T, the maximum ∆SM reaches as high as 30.9 J/kg K for Ni50Mn34Co2Sn14. A linear dependence of ΔSM upon μ0H has been found in Ni50Mn34Co2Sn14, and the origin of this linear relationship has been discussed by numerical analysis of Maxwell’s relation.

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).

Effect of Fe on the Martensitic Transition, Magnetic and Magnetocaloric Properties in Ni-Mn-In Melt-spun Ribbons

2016 ◽  
Vol 66 (4) ◽  
pp. 403 ◽  
Author(s):  
D.M. Raj kumar ◽  
N.V. Rama Rao ◽  
S. Esakki Muthu ◽  
S. Arumugam ◽  
M. Manivel Raja ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnetic Entropy Change ◽  
Thermal Hysteresis ◽  
Entropy Change ◽  
Austenite Phase ◽  
High Magnetic Fields ◽  
Martensitic Transition ◽  
Magnetic Entropy ◽  
Fe Content ◽  
Magnetocaloric Properties

The effect of Fe on the martensitic transitions, magnetic and inverse magnetocaloric effect in Ni47Mn40-xFexIn13 ribbons (x = 1, 2, 3 and 5) has been investigated. All the ribbon compositions under study have shown the presence of austenite phase at room temperature. The variation of martensitic transition with the increase in Fe-content is non-monotonic. The thermal hysteresis of the martensitic transition increased with the increase in Fe-content. The martensitic transitions shifted to lower temperatures in the presence of high magnetic fields. A maximum magnetic entropy change (∆SM) of 50 Jkg-1K-1 has been achieved in the Ni47Mn38Fe2In13 (x = 1) ribbon at 282 K for an applied field of 5 T.

scholarly journals Phase Transitions and Magnetocaloric Properties in MnCo1−xZrxGe Compounds

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Anil Aryal ◽  
Abdiel Quetz ◽  
Sudip Pandey ◽  
Igor Dubenko ◽  
Shane Stadler ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Ferromagnetic State ◽  
Partial Substitution ◽  
Cooling Power ◽  
Martensitic Transition ◽  
Ferromagnetic Transition ◽  
Scanning Calorimetry ◽  
Magnetostructural Transition ◽  
Magnetocaloric Properties ◽  
Single Transition

The structural, magnetic, and magnetocaloric properties of MnCo1-xZrxGe (0.01≤x≤0.04) have been studied through X-ray diffraction, differential scanning calorimetry, and magnetization measurements. Results indicate that the partial substitution of Zr for Co in MnCo1-xZrxGe decreases the martensitic transition temperature (TM). For x = 0.02, TM was found to coincide with the ferromagnetic transition temperature (TC) resulting in a first-order magnetostructural transition (MST). A further increase in zirconium concentration (x = 0.04) showed a single transition at TC. The MST from the paramagnetic to ferromagnetic state results in magnetic entropy changes (-ΔSM) of 7.2 J/kgK for ΔH = 5 T at 274 K for x = 0.02. The corresponding value of the relative cooling power (RCP) was found to be 266 J/kg for ΔH = 5 T. The observed large value of MCE and RCP makes this system a promising material for magnetic cooling applications.

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

Martensitic transition and magnetocaloric properties in Ni45Mn44−xFexSn11 alloys

2010 ◽  
Vol 506 (2) ◽  
pp. 516-519 ◽  
Author(s):  
J.L. Yan ◽  
Z.Z. Li ◽  
X. Chen ◽  
K.W. Zhou ◽  
S.X. Shen ◽  
...  
Keyword(s):  
Martensitic Transition ◽  
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.

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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