8 Result(s)
within
V. K. Pecharsky
Chemistry
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Chapter
New Magnetic Refrigeration Materials for the Liquefaction of Hydrogen
Five heavy lanthanide ferromagnetic intermetallic compounds were studied as potential magnetic refrigerants for the liquefaction of hydrogen gas. (Dy0.5Er0.5)Al2 and TbNi2 appear to be better refrigerants than Gd...
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Article
Copper(I) hexafluorosilicateπ-complexes with allylammonium salts. Synthesis and crystal structure of [CuOOCH·C3H5NH3]2SiF6 and [Cu2Cl3·2C3H5NH3]2SiF6
Two novel copper (I) π-complexes containing the SiF 6 2− anion have been synthesized and studied by X-ray structure analysis. The crystals of the first title c...
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Chapter
The (Dy1-xErx)Al2 Alloys as Active Magnetic Regenerators for Magnetic Refrigeration
The low temperature properties (heat capacity from 3 to 350 K in fields up to 10 T, and both ac magnetic susceptibility and dc magnetic susceptibility and magnetization from 4 to 325 K in dc fields up to 5.5 T...
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Chapter
Comparison of the Magnetocaloric Effect Derived from Heat Capacity, Direct, and Magnetization Measurements
A theoretical and experimental evaluation of the experimental method for determining the magnetocaloric properties of magnetic materials show that the magnetic field heat capacity data can provide a reliable r...
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Chapter
New Er-Based Materials for Active Magnetic Refrigeration Below 20K
High magnetic field (0 to 9.85 T) low temperature (1.2 to 30 K) heat capacity of five as-cast alloys: Er3AlC, Er3AlC0.5, Er3AlC0.25, Er3AlC0.1 and ErAgGa revealed that four of them can be used as efficient active...
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Chapter
Utilization of the Magnetic Entropy in Active Magnetic Regenerator Materials
The magnetic entropy associated with magnetic ordering has been determined for ~20 lanthanide materials and it varies from ~60 to ~90% of the theoretical Rln (2J+l) value. The utilization of this entropy in th...
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Chapter
The Influence of Multiple Magnetic Ordering on the Magnetocaloric Effect in RNiAl Alloys
Both the change in magnetic entropy (ΔSmag) and the adiabatic temperature rise (ΔTad) induced by a change of magnetic field were determined for a series of (Gd1-xErx)NiAl alloys (where x = 0, 0.30, 0.46, 0.60, 0....
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Chapter
The Giant Magnetocaloric Effect in Gd5(SixGe1-x)4 Materials for Magnetic Refrigeration
The Gd5(SixGe1-x)4 alloys, where 0 ≤ x ≤ 0.5, exhibit a giant magnetocaloric effect. This extremely large magnetocaloric effect should elevate magnetic refrigeration technology to new heights allowing it to becom...
