Dissipation losses limiting first-order phase transition materials in cryogenic caloric cooling: A case study on all-d-metal Ni(-Co)-Mn-Ti Heusler alloys

Beckmann, Benedikt; Koch, David; Pfeuffer, Lukas; Gottschall, Tino; Taubel, Andreas; Adabifiroozjaei, Esmaeil; Мирошкина, О. Н.; Riegg, Stefan; Timo, Niehoff,; Kani, Nagaarjhuna A.; Gruner, Markus E.; Molina‐Luna, Leopoldo; Skokov, Konstantin; Gutfleisch, Oliver

doi:10.1016/j.actamat.2023.118695

Cited by 24 publications

(15 citation statements)

References 85 publications

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“…Materials with first-order phase transitions, such as Gd5(SiGe)4 10 , Fe-Rh 11,12 , Ni-Mn-based Heusler alloys [13][14][15] , La(Fe,Si)13-type [16][17][18] and Fe2P-type 19,20 compounds, show large magnetocaloric effects due to field-induced magnetostructural transitions. However, they suffer from hysteresis losses [21][22][23][24] , degradation caused by mechanical failure due to large volume changes 20,25 and reduced magnetocaloric effects during cyclic magnetic field application 26,27 . Materials with second-order phase transitions, specifically the magnetic transition from ferro-to paramagnetic state at the Curie temperature 𝑇 𝐶 , are for instance Gd 28 , Gd-Y 8 , high entropy transition metal NiFeCoCrPd0.5 alloys 29 , Ni-Mn-based Heusler alloys 30,31 and Fe2AlB2 32,33 .…”

Section: Introductionmentioning

confidence: 99%

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Beckmann

El-Melegy

Koch

et al. 2023

Journal of Applied Physics

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Reactive single-step hot-pressing at 1473 K and 35 MPa for 4 h produces dense, bulk, near single-phase, low-cost, and low-criticality Fe2Al1.15B2 and Fe2Al1.1B2Ge0.05Ga0.05 MAB samples, showing second-order magnetic phase transition with favorable magnetocaloric properties around room temperature. The magnetic as well as the magnetocaloric properties can be tailored upon Ge and Ga doping, leading to an increase in the Curie temperature TC and the spontaneous magnetization mS. The maximum isothermal entropy change ΔsT,max of hot-pressed Fe2Al1.15B2 in magnetic field changes of 2 and 5 T amounts to 2.5 and 5 J(kgK)−1 at 287.5 K and increases by Ge and Ga addition to 3.1 and 6.2 J(kgK)−1 at 306.5 K, respectively. The directly measured maximum adiabatic temperature change ΔTad,max is improved by composition modification from 0.9 to 1.1 K in magnetic field changes of 1.93 T. Overall, we demonstrate that hot-pressing provides a much faster, more scalable, and processing costs reducing alternative compared to conventional synthesis routes to produce heat exchangers for magnetic cooling devices. Therefore, our criticality assessment shows that hot-pressed Fe-based MAB phases provide a promising compromise of material and processing costs, criticality, and magnetocaloric performance, demonstrating the potential for low-cost and low-criticality magnetocaloric applications around room temperature.

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Section: Introductionmentioning

confidence: 99%

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Beckmann

El-Melegy

Koch

et al. 2023

Journal of Applied Physics

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“…Indeed, the latter approach proposes a small inverse MCE down to lowest temperatures (open circles). This phenomenon can be explained by dissipative losses due to the hysteresis in materials with first-order phase transitions, as proposed by Beckmann et al [75]. These losses result in an adiabatic temperature change, estimated as ∆T diss = 0.5 • C −1 • µ 0 ¸HdM, where C is the heat capacity of the sample.…”

Section: ∆T Ad and Magnetizationmentioning

confidence: 90%

“…The sample with the thermocouple (and strain gauge if desired) is carefully placed inside the center coil as illustrated in figure 17(c). The voltage signal is recorded with the oscilloscope and then fine compensated numerically by a small correction using the field-induced signal of the pick-up coil and then integrated to magnetization [75]. In figure 18(b), we show the induced coil voltage and the calculated magnetization of the Fe-Rh example.…”

Section: Magnetizationmentioning

confidence: 99%

On the high-field characterization of magnetocaloric materials using pulsed magnetic fields

Salazar Mejía,

Niehoff,

Straßheim

et al. 2023

J. Phys. Energy

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Magnetic refrigeration is a highly active field of research. The recent studies in materials and methods for hydrogen liquefaction and innovative techniques based on multicaloric materials have significantly expanded the scope of the field. For this reason, the proper characterization of materials is now more crucial than ever. This makes it necessary to determine the magnetocaloric and other physical properties under various stimuli such as magnetic fields and mechanical loads. In this work, we present an overview of the characterization techniques established at the Dresden High Magnetic Field Laboratory in recent years, which specializes in using pulsed magnetic fields. The short duration of magnetic-field pulses, lasting only some ten milliseconds, simplifies the process of ensuring adiabatic conditions for the determination of temperature changes, ∆Tad. The possibility to measure in the temperature range from 10 to 400 K allows us to study magnetocaloric materials for both room-temperature applications and gas liquefaction. With magnetic-field strengths of up to 50 T, almost every first-order material can be transformed completely. The high field-change rates allow us to observe dynamic effects of phase transitions driven by nucleation and growth as well. We discuss the experimental challenges and advantages of the investigation method using pulsed magnetic fields. We summarize examples for some of the most important material classes including Gd, Laves phases, La-Fe-Si, Mn-Fe-P-Si, Heusler alloys and Fe-Rh. Further, we present the recent developments in simultaneous measurements of temperature change, strain, and magnetization, and introduce a technique to characterize multicaloric materials under applied magnetic field and uniaxial load. We conclude by demonstrating how the use of pulsed fields opens the door to new magnetic-refrigeration principles based on multicalorics and the “exploiting-hysteresis” approach.

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“…The thermoelastic model to determine ∆𝐺 𝑒𝑙 𝑀−𝑃 and 𝐸 𝑖𝑟𝑟 𝑀−𝑃 is an approximation and does not include an asymmetric hysteresis or transformation behavior for forward and reverse transformation 51,52 , or an increase of the dissipative energy by increasing applied magnetic field 54,55 . Therefore, the calculation of 𝐸 𝑖𝑟𝑟 𝑀−𝑃 includes a number of uncertainties, however, since this model is applied to both samples, exhibiting a nearly identical chemical composition of the matrix phase and grain size, the relative difference of ∆𝐺 𝑒𝑙 𝑀−𝑃 and 𝐸 𝑖𝑟𝑟 𝑀−𝑃 between both samples can be determined and directly linked to the presence of the Gd-precipitates.…”

Section: Effect Of Hysteresis On the Thermoelastic Phase Transitionmentioning

confidence: 99%

Influence of Gd-rich precipitates on the martensitic transformation, magnetocaloric effect, and mechanical properties of Ni–Mn–In Heusler alloys—A comparative study

Scheibel

Liu

Pfeuffer

et al. 2023

Journal of Applied Physics

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A multi-stimuli cooling cycle can be used to increase the cyclic caloric performance of multicaloric materials like Ni–Mn–In Heusler alloys. However, the use of uniaxial compressive stress as an additional external stimulus to a magnetic field requires good mechanical stability. Improvement in mechanical stability and strength by doping has been shown in several studies. However, doping is always accompanied by grain refinement and a change in transition temperature. This raises the question of the extent to which mechanical strength is related to grain refinement, transition temperature, or precipitates. This study shows a direct comparison between a single-phase Ni–Mn–In and a two-phase Gd-doped Ni–Mn–In alloy with the same transition temperature and grain size. It is shown that the excellent magnetocaloric properties of the Ni–Mn–In matrix are maintained with doping. The isothermal entropy change and adiabatic temperature change are reduced by only 15% in the two-phase Ni–Mn–In Heusler alloy compared to the single-phase alloy, which results from a slight increase in thermal hysteresis and the width of the transition. Due to the same grain size and transition temperature, this effect can be directly related to the precipitates. The introduction of Gd precipitates leads to a 100% improvement in mechanical strength, which is significantly lower than the improvement observed for Ni–Mn–In alloys with grain refinement and Gd precipitates. This reveals that a significant contribution to the improved mechanical stability in Gd-doped Heusler alloys is related to grain refinement.

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Dissipation losses limiting first-order phase transition materials in cryogenic caloric cooling: A case study on all-d-metal Ni(-Co)-Mn-Ti Heusler alloys

Cited by 24 publications

References 85 publications

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

On the high-field characterization of magnetocaloric materials using pulsed magnetic fields

Influence of Gd-rich precipitates on the martensitic transformation, magnetocaloric effect, and mechanical properties of Ni–Mn–In Heusler alloys—A comparative study

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