Experimental Study of Magnetocaloric Effect in Ni-Fe-Mn-Ga and Ni-Co-Mn-Ga Heusler Alloys

In this work we experimentally studied the MCE in the Heusler alloys Ni2.19-xFexMn0.81Ga (x = 0.01, 0.02, 0.03, 0.04) and Ni2.16-xCoxMn0.84Ga (x = 0.03, 0.06, 0.09). Magnetocaloric effect was measured by the direct method using the installation from the company AMT&C. The temperature dependencies of ∆Tad for the magnetic field change ∆H = 2 T were measured. The phase transition temperatures were determined from temperature dependencies of low field magnetization measured by original setup using Hall effect. Studies have shown that replacement of the Ni atoms with the iron atoms slightly reduces the temperature magnetostructural transition for x = 0.01,0.02, and starting with x = 0.03, magnetic and structural transitions occur separately and a further increase in iron concentration leads to the Curie temperature increase, while the temperature martensitic transformation decreases. When replacing the Ni atoms with the Co atoms of the martensitic transformation temperature and Curie temperature increase.

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Magnetocaloric Effect in Ni-Mn-Ga and Ni-Co-Mn-In Heusler Alloys

MRS Proceedings ◽

10.1557/proc-1200-g07-03 ◽

2009 ◽

Vol 1200 ◽

Cited By ~ 1

Author(s):

Vasiliy Buchelnikov ◽

Sergey Taskaev ◽

Mikhail Drobosyuk ◽

Vladimir Sokolovskiy ◽

Viktor Koledov ◽

...

Keyword(s):

Magnetic Field ◽

Magnetocaloric Effect ◽

Curie Point ◽

Direct Method ◽

Heusler Alloys ◽

Field Change ◽

Adiabatic Temperature Change ◽

Magnetic Field Change ◽

A Direct Method ◽

The Magnetic Field

AbstractThe positive magnetocaloric effect (MCE) in the vicinity of the Curie point in Ni2+xMn1-xGa (x=0.33, 0.36, 0.39) Heusler alloys and the negative and positive MCE near the metamagnetostructural (MMS) transition and the Curie point, respectively, in Ni45Co5Mn36.5In13.5 Heusler alloy has been measured by a direct method. For the magnetic field change ΔH = 2 T, the maximal adiabatic temperature change ΔTad at the Curie point in Ni2+xMn1-xGa alloys is larger than 0.6 K. For Ni45Co5Mn36.5In13.5 alloy, the maximal value of ΔTad = 1.68 K (for the same magnetic field change, ΔH = 2 T) is observed at the MMS phase transition temperature.

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The Magnetocaloric Effect in Ni-Mn-X (X=Ga, in) Heusler Alloys and Manganites with Magnetic Transition close to Room Temperature

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.168-169.165 ◽

2010 ◽

Vol 168-169 ◽

pp. 165-168

Author(s):

Vasiliy D. Buchelnikov ◽

Mikhail Drobosyuk ◽

E.A. Smyshlyaev ◽

O.O. Pavlukhina ◽

A.V. Andreevskikh ◽

...

Keyword(s):

Magnetic Field ◽

Magnetocaloric Effect ◽

Room Temperature ◽

Direct Method ◽

Magnetic Transition ◽

Heusler Alloys ◽

Field Change ◽

Adiabatic Temperature Change ◽

Magnetic Field Change ◽

The Magnetic Field

The magnetocaloric effect (MCE) in theNi2+xMn1-xGa (x = 0.33, 0.36, 0.39), Ni50Mn25In25, Ni54Mn21Ga18In7, Ni53.5Mn21.5Ga16In9, Ni45Co5Mn36.5In13.5 Heusler alloys and in the La0.7BayCa0.3-yMnO3 (y = 0.12, 0.24, 0.3) manganites at the Curie points have been measured by the direct method. For the magnetic field change H = 2 T, the maximal adiabatic temperature change Tad in the Ni2+xMn1-xGa alloys is larger than 0.6 K. For the Ni50Mn25In25 alloy the maximal value of Tad = 1.51 K (for the same magnetic field change H = 2 T) is observed at the magnetic phase transition temperature.

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Direct and Inverse Magnetocaloric Effect in Ni1.81Mn1.64In0.55 Multifunctional Heusler Alloy

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.233-234.183 ◽

2015 ◽

Vol 233-234 ◽

pp. 183-186 ◽

Cited By ~ 3

Author(s):

Rafael Fayzullin ◽

Vasiliy D. Buchelnikov ◽

Mikhail Drobosyuk ◽

Alexey Mashirov ◽

Alexander Kamantsev ◽

...

Keyword(s):

Magnetic Field ◽

Phase Transition ◽

Magnetocaloric Effect ◽

Heusler Alloy ◽

Direct Method ◽

Field Change ◽

Adiabatic Temperature Change ◽

Phase Transition Temperatures ◽

Magnetic Field Change ◽

The Magnetic Field

The magnetocaloric effect (MCE) in Ni1.81Mn1.64In0.55 Heusler alloy has been measured by the direct method. The field dependences of the magnetization were obtained. The phase transition temperatures were determined. The maximal adiabatic temperature change ΔTad near the Curie temperature is 1.8 K under the magnetic field change ∆H = 18 kOe. The inverse MCE (∆Tad = -3.72 K) in the same field change takes place near the temperature of martensitic transformation.

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Теплоемкость и магнитокалорический эффект соединений LaFe-=SUB=-11.2-x-=/SUB=-Mn-=SUB=-x-=/SUB=-Co-=SUB=-0.7-=/SUB=-Si-=SUB=-1.1-=/SUB=- (x=0, 0.1, 0.2, 0.3)

Физика твердого тела ◽

10.21883/ftt.2020.05.49239.02m ◽

2020 ◽

Vol 62 (5) ◽

pp. 752

Author(s):

Н.З. Абдулкадирова ◽

А.М. Алиев ◽

А.Г. Гамзатов ◽

P. Gebara

Keyword(s):

Heat Capacity ◽

Magnetic Fields ◽

Curie Temperature ◽

Specific Heat ◽

Magnetocaloric Effect ◽

Intermetallic Compounds ◽

Indirect Method ◽

Direct Method ◽

Capacity Data ◽

Value Changes

The specific heat and magnetocaloric effect of the LaFe11.2-хMnxCo0.7Si1.1 intermetallic compounds (x = 0.1, 0.2, 0.3) were measured in the temperature range 80–300 K and in magnetic fields up to 8 T. The magnetocaloric effect (MCE) was estimated using two methods: direct method in cyclic magnetic fields, as well as an indirect method from heat capacity data. It was shown that an increase in the concentration of Mn atoms leads to a shift in the Curie temperature of the TC toward lower temperatures, while the FM value changes slightly.

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Research of magnetocaloric effect of Ni-Mn-In-Co- based Heusler alloys by the direct method in magnetic fields up to 14 T

2017 IEEE International Magnetics Conference (INTERMAG) ◽

10.1109/intmag.2017.8007634 ◽

2017 ◽

Author(s):

E. Dilmieva ◽

I. Koshkidko ◽

A.P. Kamantsev ◽

V. Koledov ◽

A. Mashirov ◽

...

Keyword(s):

Magnetic Fields ◽

Magnetocaloric Effect ◽

Direct Method ◽

Heusler Alloys

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Martensitic transformation, magnetocaloric effect and phase transition strain in Ni 50 Mn 36− x Ge x Sn 14 Heusler alloys

Rare Metals ◽

10.1007/s12598-016-0820-6 ◽

2016 ◽

Author(s):

Dong Zheng ◽

Chao Jing ◽

Bo Lu ◽

Zhe Li ◽

Kun Xu

Keyword(s):

Phase Transition ◽

Martensitic Transformation ◽

Magnetocaloric Effect ◽

Heusler Alloys ◽

Transition Strain

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Magnetoresistance and Thermal Transformation Arrest in Pd2Mn1.4Sn0.6 Heusler Alloys

Materials ◽

10.3390/ma12142308 ◽

2019 ◽

Vol 12 (14) ◽

pp. 2308 ◽

Cited By ~ 2

Author(s):

Xiao Xu ◽

Hironari Okada ◽

Yusuke Chieda ◽

Naoki Aizawa ◽

Daiki Takase ◽

...

Keyword(s):

Magnetic Field ◽

Martensitic Transformation ◽

Curie Temperature ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Thermal Transformation ◽

Heusler Alloys ◽

Parent Phase ◽

Electric Resistivity ◽

Transformation Temperatures

The magnetization, electric resistivity, and magnetoresistance properties of Pd 2 Mn 1 . 4 Sn 0 . 6 Heusler alloys were investigated. The Curie temperature of the parent phase, martensitic transformation temperatures, and magnetic field dependence of the martensitic transformation temperatures were determined. The magnetoresistance was investigated from 10 to 290 K, revealing both intrinsic and extrinsic magnetoresistance properties for this alloy. A maximum of about − 3 . 5 % of intrinsic magnetoresistance under 90 kOe and of about − 30 % of extrinsic magnetoresistance under 180 kOe were obtained. Moreover, the thermal transformation arrest phenomenon was confirmed in the Pd 2 Mn 1 . 4 Sn 0 . 6 alloy, and an abnormal heating-induced martensitic transformation (HIMT) behavior was observed.

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Direct Measurements of Magnetocaloric Effect in a Single Crystalline Ni2.13Mn0.81Ga1.06 Heusler Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.872.38 ◽

2016 ◽

Vol 872 ◽

pp. 38-42

Author(s):

Vladimir Khovaylo ◽

Konstantin Skokov ◽

Sergey Taskaev ◽

Alexey Karpenkov ◽

Dmitriy Karpenkov ◽

...

Keyword(s):

Magnetic Field ◽

Martensitic Transformation ◽

Magnetocaloric Effect ◽

Direct Method ◽

Magnetic Transition ◽

Martensitic Transformations ◽

Austenitic Phase ◽

Single Crystalline ◽

First Order ◽

Direct Measurements

Magnetocaloric effect (MCE) in the vicinity of first order martensitic transformation and second order magnetic transition in a single crystalline Ni2.13Mn0.81Ga1.06 Heusler compound was studied by a direct method. The obtained results revealed that, for the applied magnetic field strength μ0H = 1.9 T, MCE is irreversible in the vicinity of the first order martensitic transformation only when the MCE measurements are performed under cooling protocol. Plot of the experimentally measured adiabatic temperature change ΔTad as a function of temperature T indicated that ΔTad has a negligible benefit from the magnetic field-induced conversion of the high-temperature austenitic phase into the low-temperature martensitic phase and is mainly determined by the paraprocess of the austenitic phase around both direct and reverse martensitic transformations.

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Influence of the transition width on the magnetocaloric effect across the magnetostructural transition of Heusler alloys

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2015.0306 ◽

2016 ◽

Vol 374 (2074) ◽

pp. 20150306 ◽

Cited By ~ 15

Author(s):

F. Cugini ◽

G. Porcari ◽

S. Fabbrici ◽

F. Albertini ◽

M. Solzi

Keyword(s):

Magnetocaloric Effect ◽

Heusler Alloys ◽

Entropy Change ◽

Large Temperature ◽

Transition Width ◽

Critical Temperatures ◽

Magnetostructural Transition ◽

Magnetocaloric Properties ◽

Clear Result ◽

Effective Use

We report a complete structural and magneto-thermodynamic characterization of four samples of the Heusler alloy Ni-Co-Mn-Ga-In, characterized by similar compositions, critical temperatures and high inverse magnetocaloric effect across their metamagnetic transformation, but different transition widths. The object of this study is precisely the sharpness of the martensitic transformation, which plays a key role in the effective use of materials and which has its origin in both intrinsic and extrinsic effects. The influence of the transition width on the magnetocaloric properties has been evaluated by exploiting a phenomenological model of the transformation built through geometrical considerations on the entropy versus temperature curves. A clear result is that a large temperature span of the transformation is unfavourable to the magnetocaloric performance of a material, reducing both isothermal entropy change and adiabatic temperature change obtainable in a given magnetic field and increasing the value of the maximum field needed to fully induce the transformation. The model, which is based on standard magnetometric and conventional calorimetric measurements, turns out to be a convenient tool for the determination of the optimum values of transformation temperature span in a trade-off between sheer performance and amplitude of the operating range of a material. This article is part of the themed issue ‘Taking the temperature of phase transitions in cool materials’.

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