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Showing 1 to 20 of 47 for “"Rare earth metals"”.
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Raman scattering in heavy rare earth metals
… In order to measure the weak Raman signals of metals a single grating monochromator was designed and constructed and added to an existing double grating monochromator to improve the stray light rejection. Polarized Raman Scattering was used to probe vibrational and electronic excitations in Dy, …
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Characterization of ferromagnetic saturation at 4.2K of selected bulk rare earth metals for compact high-field superconducting cyclotrons
The saturation magnetization of the rare earth ferromagnetic metals gadolinium and holmium was investigated. Cylindrical samples were placed in a superconducting test magnet and induced magnetic field measured at various applied fields. Data was obtained with Hall sensors mounted at the tips of the …
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Heavy rare earth superlattices: Epitaxial growth, structure, and magnetic properties
Single crystal superlattices of heavy rare earth metals with yttrium have been synthesized by methods of molecular beam epitaxy developed in this thesis research. Studies of the growth behavior of hcp rare earth metals on bcc transition metal (110) and (211) surfaces, using electron and x-ray …
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Rare earth metal separation with new amide functionalised ionic liquids: understanding species and selectivity
Recycling rare-earth metals from end-of-life products such as hard-drive magnets is of critical importance particularly in the face of growing demand for consumer goods and other applications. Liquid-liquid extraction is the preferred method of separation utilising organic extractants owing to …
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Novel magnetic behavior in heavy rare earth superlattices
Structural and magnetic properties of heavy rare earth films and superlattices synthesized by molecular beam epitaxy are investigated. Epitaxial films of rare earth metals, and superlattices of rare earths with Y interlayers, are grown along different hcp orientations using novel techniques …
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Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing
Rare-earth(RE)-iron-boron permanent magnets are among the strongest permanent magnets available and power essential technologies, from wind turbines to hard disk drives. The production of the rare earth metal for these magnets currently involves significant greenhouse gas emissions and other …
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Magnetic susceptibility and knight shift measurements in aluminum-rare earth alloys
… and solvent Knight shift in dilute alloys of rare earth metals in aluminum have been carried out. The susceptibility results give a clear indication that localized moments exist on each impurity except La, Yb, and Lu, and that the coupling between the total spin and The total orbital angular …
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Growth and magnetoelastic behavior of b-axis-oriented dysprosium
The rare earth metals have the largest known magnetostrictions, so that their magnetic properties and structural properties are strongly coupled. This coupling is ideally suited for investigation with thin films, in which single crystal films of high quality can be prepared on substrates which …
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Solid state interaction between thin metal films and SiO2 substrate.
… reacted with the S1O2, while none of the other metals reacted even after heating for hours at high temperatures of up to 900° C. These results as well as all the other metal-S1O2 interaction studies that could be found in the literature were summarized and extensively analysed. In all the cases …
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Besetzte und unbesetzte elektronische Struktur von geordneten Dünnschichtverbindungen der Seltenen Erden Eu und Yb mit den Übergangsmetallen Pd und Ni
… states of intermetallic compounds of the rare-earth metals (RE) Eu and Yb with the transition metals Pd and Ni. The compounds were prepared in-situ as epitaxial thin films on single-crystalline substrates. For comparison, the experiments were extended to a Ba/Pd compound, which was …
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Rare-earth doped aluminum oxide lasers for silicon photonics
… photonics components has been realized by use of rare-earth metals as dopants. By co-sputtering aluminum and erbium targets, Er3+ dopants at concentrations on the order of 1.0x1020 cm-3 have been added to the Al2O3 host medium. Resulting Er3+:Al2O3 films have been characterized, and over 3 dB/cm …
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Design, synthesis, and characterization of complex chalcogenides for energy storage and energy conversion applications
… chalcogenides with the combination of main group metals, transition metals, and rare earth metals have been synthesized using the building block approach and their structure-property relationships are evaluated. The main emphasis of research is on rationally designing new materials for …
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Effect of rare earths on the properties of cast iron
The rare earth metals cerium, mischmetal, lanthanum, and didymitun were added to irons in the amounts of 0.08 to 0.20 per cent. Silicon and graphite were added to the iron at the electric furnace to change the carbon equivalent of the base metal. The base metal was super-heated to temperatures of …
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Strength and ductility of Mg alloys from first-principles
… show that 25 of these solutes (alkali, alkaline earth, rare earth metals, Zr and Hf) have the potential to increase prismatic slip and lower forming temperatures of Mg. Optimal concentrations and reduced forming temperatures are shown for these 25 solutes. Additionally, we study solute stacking …
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The Material Separation Process for Recycling End-of-life Li-ion Batteries
… power grids need to be properly recycled to save rare earth metals and avoid any hazardous threats to the environment. The recycling process of a Lithium-ion Battery Cell/Module includes storage, transportation, deactivation, disassembly, and material recovery. This study focused on the …
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Anisotropy and magnetostriction of GdA12 and related compounds
… RAlg and RxRx'1-xAl2, where R and R' are rare-earth metals, have been grown by the Czochralski technique. Measurements of the magnetostrictions and anisotropies of disc-shaped samples of the compounds GdAl2, Gd0.98 Tbg0.02 and Gdg0.95Tbg0.95 Al2 have been made between 4.2K and their Curie …
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Rare earth impurities in metals: The transition from virtual to bound f levels
… have been carried out in dilute alloys of the rare earth metals in liquid Cu. Other measurements of the Al and Cu Knight shift in dilute alloys of Gd in Al-Cu and Al-Ag binary alloys have also been made. The susceptibility measurements of the rare earths in liquid Cu indicate localized magnetic …
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An Investigation into Cerium Oxidation Under Acidic Conditions
Separation of rare earth elements (REE) is often achieved by acid leaching of mineral concentrates followed by subsequent solvent extraction, to produce individual rare earth metals. Cerium, the most abundant of these elements, is usually the largest component of commercial ores. Demand for less …
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