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Showing 1 to 15 of 15 for “"magnetocaloric"”.
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EXPLORATION OF NEW MAGNETOCALORIC AND MULTIFUNCTIONAL MAGNETIC MATERIALS
… value is comparable to those of well-known giant magnetocaloric materials, such as Gd5Si2Ge2, MnFeP0.45As0.55, and Ni50Mn37Sn13. The values of the latent heat (L = 6.6 J/g) and corresponding total entropy changes (∆ST = 35 J/kg K) have been evaluated for the MST using DSC measurements. Large …
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Methods for the analysis of thermomagnetic phase transitions of magnetocaloric materials
… between thermomagnetic phase transitions and magnetocaloric response of materials. First, various experimental factors that can a ect the measurements of the magnetocaloric e ect and can potentially cause misleading interpretation or artifacts are studied with the aid of experimental data and …
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Investigation of the magnetic and magnetocaloric properties of complex lanthanide oxides
… this dissertation, the structural, magnetic and magnetocaloric properties of three families of lanthanide oxides have been studied with the dual aims of investigating the magnetic behaviour and identifying promising magnetic refrigerants for cooling to temperatures currently accessible using …
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EXPLORATION OF NEW MULTIFUNCTIONAL MAGNETIC MATERIALS BASED ON A VARIETY OF HEUSLER ALLOYS AND RARE-EARTH COMPOUNDS
Magnetic, magnetocaloric, magnetotransport and magnetoelastic properties of Ni-Mn-X (X = In, and Ga) Heusler alloys and La-Fe-Si based rare earth compounds have been synthesized and investigated by x-ray diffraction, magnetization, strain, and electrical resistivity measurements. The phase …
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Caloric effects in ferroic materials
… systems that do not use harmful fluids. Magnetocaloric, electrocaloric and mechanocaloric materials have been studied independently as potential replacement of these fluids refrigerants but each has its own limitations. More recently, multicaloric materials that respond to multiple fields …
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Polynuclear 3d/4f-Metal Complexes as Molecular Magnetic Refrigerants and Single-Molecule Magnets
… specifically single-molecule magnetism and the magnetocaloric effect. In this thesis, Chapter 1 lays the foundation for the research presented within. This section covers the fundamentals of polynuclear metal complexes, molecular magnetism, and the magnetocaloric effect, as well as the …
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Optimization of Materials for Magnetic Refrigeration and Thermomagnetic Power Generation
<p>The magnetocaloric effect, by which a magnetic material experiences a change in temperature due to an applied magnetic field, can be used for refrigeration. The corollary to the magnetocaloric effect -- known as the pyromagnetic effect -- is the phenomenon by which a magnetic material …
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Ab initio based Monte Carlo model of phase transformations in ferromagnetic shape memory alloys
… the degree to which they will exhibit the magnetocaloric effect (MCE), which is a promising alternative to conventional refrigeration mechanisms. Our framework consists of a combination of ab-initio simulations and Monte Carlo models which allow an alloy to be examined across its phase …
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Structural and Magnetic Phases in Pressure-Tuned Quantum Materials
… Secondly, pressure is used to explore the magnetocaloric properties of the antiferromagnet EuTiO3. Recent work has shown that this compound compares favourably to many materials commonly used in magnetic refrigeration. Measurements show that these properties are suppressed by the …
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Magneto-transport properties of manganite/secondary phase inhomogeneous systems
… x= 0.02, 0.04 and 0.06 ratio. An improvement in magnetocaloric (MC) properties in comparison with LBMO at the same working temperature is observed. Its relative cooling power is promoted from 35 J/kg to 51 J/kg, 47 J/kg, 50 J/kg and 49 J/kg with the introduced TiO2 for x=0.02, 0.04, 0.06 and …
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Electrocaloric applications based on multilayer capacitors of PbSc₀.₅Ta₀.₅O₃
… 176 K. These EC effects compare favourably to magnetocaloric (MC) effects in gadolinium working bodies, suggesting that MC heat-pump design could be repurposed to achieve better performance. Efficiency values for cooling cycles based on MLCs of PST are computed and analyzed by assuming a …
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Low-dimensional and frustrated magnetism in complex lanthanide oxides
… order above 1.8 K in the other compounds. The magnetocaloric performance of Ca4GdO(BO3)3 and Ca4HoO(BO3)3 was found to be comparable with the well-known magnetic refrigerants Gd3Ga5O12 and Dy3Ga5O12 respectively. Secondly, the structural behaviour of the barium borates Ba3Ln(BO3)3 was probed as …
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Tuning Strong Correlated Properties in EuTiO3 Thin Films Grown by Pulsed Laser Deposition
… there is an increasing interest in exploring the magnetocaloric effect (MCE) in ETO-based bulk materials. First, systematic studies for optimizing the growth condition for ETO-based self-assembled vertically alligned nanocomposite (VAN) thin films were carried out. We carried out investigations …
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Design optimization of high-performance regenerator for caloric cycles using numerical and experimental methods
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Magnetisierungsmessungen in hohen magnetischen Impulsfeldern
In der vorliegenden Arbeit wurden vor allem das Auftreten und der Mechanismus von feldinduzierten Übergängen und der damit verbundenen kritischen Felder untersucht. Die verwendete Magnetisierungsmessmethode ist auf die bestehende Impulsfeldanlage des IFW Dresden abgestimmt. Die Magnetisierung in …