Effects of annealing on the magnetic properties and magnetocaloric effects of B doped Ni-Mn-In melt-spun ribbons

Pandey, Sudip; Quetz, Abdiel; Ibarra-Gaytán, P. J.; Sánchez-Valdés, C.F.; Aryal, Anil; Dubenko, Igor; Mazumdar, Dipanjan; Llamazares, J. L. Sánchez; Stadler, Shane; Ali, Naushad

doi:10.1016/j.jallcom.2017.10.063

Cited by 17 publications

(9 citation statements)

References 24 publications

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“…In Ni-Mn-X off-stoichiometric MSMAs, the ΔM can be enhanced by composition tuning 11,12 , heat treatment 13,14 and doping 15,16 . It has been reported that high-Mn content Ni-Mn-X alloys exhibited enhanced ΔM because the magnetization of the austenite was mainly attributed to the ferromagnetic interaction between the neighboring Mn-Mn atoms 17 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Zhang

Qian

et al. 2018

Sci Rep

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High magnetocaloric refrigeration performance requires large magnetic entropy change ΔSM and broad working temperature span ΔTFWHM. A fourth element doping of Co in ternary Ni-Mn-Sn alloy may significantly enhance the saturation magnetization of the alloy and thus enhance the ΔSM. Here, the effects of Co-doping on the martensite transformation, magnetic properties and magnetocaloric effects (MCE) of quaternary Ni47−xMn43Sn10Cox (x = 0, 6, 11) alloys were investigated. The martensite transformation temperatures decrease while austenite Curie point increases with Co content increasing to x = 6 and 11, thus broadening the temperature window for a high magnetization austenite (13.5, 91.7 and 109.1 A·m2/kg for x = 0, 6 and 11, respectively). Two successive magnetostructural transformations (A → 10 M and A → 10 M + 6 M) occur in the alloy x = 6, which are responsible for the giant magnetic entropy change ΔSM = 29.5 J/kg·K, wide working temperature span ΔTFWHM = 14 K and large effective refrigeration capacity RCeff = 232 J/kg under a magnetic field of 5.0 T. These results suggest that Ni40.6Mn43.3Sn10.0Co6.1 alloy may act as a potential solid-state magnetic refrigerant working at room temperature.

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Section: Introductionmentioning

confidence: 99%

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Zhang

Qian

et al. 2018

Sci Rep

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“…The MCE characteristics of as-cast and annealed melt-spun Ni 50 Mn 35 In 14.5 B 0.5 alloy ribbons, in which the isoelectronic B is substituted for In, were identical to the bulk alloy. A relative cooling power of 150 J/kg for annealed ribbons was reported [102]. …”

Section: Methods Of Synthesis and Characterizationmentioning

confidence: 99%

Ferromagnetic Shape Memory Heusler Materials: Synthesis, Microstructure Characterization and Magnetostructural Properties

et al. 2018

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An overview of the processing, characterization and magnetostructural properties of ferromagnetic NiMnX (X = group IIIA–VA elements) Heusler alloys is presented. This type of alloy is multiferroic—exhibits more than one ferroic property—and is hence multifunctional. Examples of how different synthesis procedures influence the magnetostructural characteristics of these alloys are shown. Significant microstructural factors, such as the crystal structure, atomic ordering, volume of unit cell, grain size and others, which have a bearing on the properties, have been reviewed. An overriding factor is the composition which, through its tuning, affects the martensitic and magnetic transitions, the transformation temperatures, microstructures and, consequently, the magnetostructural effects.

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“…These types of transitions are commonly observed in alloys containing lanthanide elements (rare earths), due to their electronic configuration [13,14]. Alloys based on these elements have the best magnetocaloric response; however, these materials are very expensive, due to their obtaining and processing methods.The use of 3d transition elements has also attracted considerable attention, due to their unique physical properties and promising applications, such as magnetic field-induced shape memory effect, magnetic field-induced strain, magnetocaloric effect, and magnetoresistance [15][16][17][18]. The magnetocaloric effect in Ni-Mn and Ni-Mn-Z (Z = Ni, Cu, Co, Fe, Mn, and Cr) Heusler alloys leads to an existing field, which is considerably less expensive and higher effective than conventional rare-earth-based magnetocaloric alloys [15].…”

mentioning

confidence: 99%

“…The magnetocaloric effect in Ni-Mn and Ni-Mn-Z (Z = Ni, Cu, Co, Fe, Mn, and Cr) Heusler alloys leads to an existing field, which is considerably less expensive and higher effective than conventional rare-earth-based magnetocaloric alloys [15]. It has been found that the magnetic properties and phase stability of these systems are sensitive to small changes in the concentrations of the parent components and the substitution of Ni, Mn, or In by an additional element Z [15][16][17][18]. The phenomena related to the magneto-structural transitions are highly dependent on the weighted average radius of the constituent ions [16].…”

mentioning

confidence: 99%

“…In this case, the martensitic phase transformation from the ferromagnetic parent phase to the antiferromagnetic-like martensite phase was detected [16]. Since martensitic transformation plays an important role in the magnetocaloric effect, thermal treatments become also important to optimize the MCE [18,19].On the other hand, magnetic Cu-based alloys with 3d transition metals have attracted a special scientific interest. Although their magnetocaloric response is much lower than that observed in rare-earths Cu alloys, they are also considered for the development of new applications in the field of MR [12].…”

mentioning

confidence: 99%

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Effect of Quenching and Normalizing on the Microstructure and Magnetocaloric Effect of a Cu–11Al–9Zn Alloy with 6.5 wt % Ni–2.5 wt % Fe

et al. 2019

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First-order phase transitions (FOPT) and second-order phase transitions (SOPT) are commonly observed in Cu alloys containing lanthanide elements, due to their electronic configuration, and have an important effect on the optimization of their magnetocaloric effect (MCE). Alloys containing rare earths have the best magnetocaloric response; however, these elements are very expensive, due to their obtaining and processing methods. The present work reports the effect of using 3d transition elements and thermal treatments on the microstructure and MCE of Cu-11Al-9Zn alloys with 6.5 wt % Ni and 2.5 wt % Fe. It was found that thermal treatments of quenching and normalizing, as well as the use of Ni and Fe, have an important influence on both the resulting phases and MCE of the investigated alloy. MCE was calculated indirectly from the change in the magnetic entropy (-∆S m ) under isothermal conditions, using Maxwell´s relation; it was found that samples subjected to normalizing presented a higher magnetocaloric effect than samples with quenching, which was related to the greater disorder in the alloy, due to the coexistence of β 1 + β phases. Magnetochemistry 2019, 5, 48 2 of 12The entropy of such a system can be considered as the sum of two contributions: the entropy related to magnetic ordering and the entropy related to the temperature of the system. Application of a magnetic field will order the magnetic moments comprising the system, which are disordered by the thermal agitation energy, and consequently, the entropy depending on the magnetic ordering (the magnetic entropy, S m ) will be lowered. If a magnetic field is applied under adiabatic conditions, when any heat exchange with the surroundings is absent, then the entropy related to the temperature should increase in order to maintain constant the total entropy of the system constant. Increasing this entropy implies that the system heats up and increases its temperature [5].Unlike conventional refrigeration, magnetic refrigeration (MR) does not use gases that can contribute to the global heating and the deterioration of the ozone layer. However, so far only a few prototype refrigeration machines have been presented worldwide, and there are still many scientific and technological challenges to overcome [6,7]. While in conventional refrigeration a fluid undergoes compression/evaporation processes, causing a change in the temperature of the system, MR is based on a magnetization/demagnetization process. Therefore, the efficiency of the equipment used in MR depends strongly on the magnetic behavior of the solid refrigerant [8,9]. MCE can be obtained by promoting first-order transitions (for example, the martensitic transformation) due to a high crystal lattice disorder, which results in an increase of the total system entropy that leads to better cooling capacity [9]. When the material exhibits a ferromagnetic-paramagnetic transition (second-order transition) during service, the refrigeration capacity can be also improved, since the disorder of the system increases ...

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Effects of annealing on the magnetic properties and magnetocaloric effects of B doped Ni-Mn-In melt-spun ribbons

Cited by 17 publications

References 24 publications

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Ferromagnetic Shape Memory Heusler Materials: Synthesis, Microstructure Characterization and Magnetostructural Properties

Effect of Quenching and Normalizing on the Microstructure and Magnetocaloric Effect of a Cu–11Al–9Zn Alloy with 6.5 wt % Ni–2.5 wt % Fe

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