Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 186 for “"Yttrium"”.
-
Magnetic properties of the rare earth systems neodymium/yttrium and dysprosium/yttrium
We have studied a series of Nd/Y films and superlattices, grown by molecular beam epitaxy (MBE), using neutron, x-ray, and bulk magnetization techniques. These epitaxial Nd/Y systems are the first to be grown and studied which incorporate a light rare earth (RE) element. Using neutron diffraction, …
-
Effects of hydrogen uptake and yttrium doping on the oxidation of zirconium-yttrium alloys
… reduce the possibility of cracking by alloying yttrium into the zirconium. Yttrium acts as a hydrogen getter, and provides dispersed nucleation sites and nodular hydrides. Using yttrium has two drawbacks: increased hydrogen uptake and increased oxidation kinetics. Hydrogen uptake in …
-
Feasibility of electrodeposition of yttrium and barium
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
-
Properties of off stoichiometric yttrium iron garnet
YFO (YFeO3) target is used for deposition on GGG (Ga3Gd5O12) substrates with different directions: (001), (110) and (111) by PLD (Pulsed Laser Deposition). HRXRD characterization shows that high-quality epitaxial garnet phase is formed on GGG substrates. However, RSM results show that the …
-
Evaluation of yttrium-90 positron emission tomography dosimetry
… liver's unique dual system blood supply to trap yttrium-90 (<sup>90</sup>Y) microspheres in microvasculature near liver tumors. Radioembolization dose planning and dosimetry are based on crude, inaccurate assumptions due to the lack of knowledge of patient specific <sup>90</sup>Y microsphere …
-
Palladium, yttrium, copper ternary alloys for hydrogen purification
… the hydrogen sorption properties (palladium-yttrium), and palladium’s resistance to poisoning by hydrogen sulphide (palladium-copper). Whilst a number of binary palladium alloys have previously been investigated none has shown all the required target properties for an effective hydrogen …
-
Laser spectroscopy of color centers in yttrium aluminum garnet
Nd:YAG lasers have become ubiquitous as tools for spectroscopy, materials processing, and medical care. It is well known by crystal growers that lattice defects in Nd:YAG can stifle laser efficiency, but to date very little has been done to isolate and characterize individual YAG defects. Knowing …
-
Bias and Variability In Image-Based Volumetric Yttrium-90 Dosimetry
<p>90Y-microsphere therapy has been widely accepted as a treatment option for both primary and metastatic liver tumors where the patients are ineligible for surgical resection and external beam radiation therapy. The prognosis of untreated patient having liver cancer is very poor with life …
-
Metal-insulator transition in yttrium- and neodymium-doped lanthanum nickelates
Discovery of high-temperature superconductivity (SC) in (La,Ba)₂CuO₄ opened many lines of investigation into similar perovskite-related compounds, such as the square-planar “infinite-layer” superconductor, Sr₁₋ₓRₓCuO₂ (R = rare-earth element). Until recently, SC had not yet been found in any …
-
Spin-lattice relaxation of trivalent holmium in yttrium ethyl sulfate
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-03-20T18:54:07Z No. of bitstreams: 1 1971_kemple.pdf: 4497497 bytes, checksum: 9c11ee327e9769ca7c4735277fb42668 (MD5)
-
Interlayer optical response of yttrium barium (copper (cobalt, zinc)) oxide
We report optical reflectance and spectroscopic ellipsometry measurements of the in- and out-of-plane dielectric responses of chain substituted $\rm YBa\sb2Cu\sb3O\sb{6 + x}$ and $\rm YBa\sb2(Cu\sb{1 - y}Co\sb{y})\sb3O\sb{6 + x}$ and of plane substituted $\rm YBa\sb2(Cu\sb{1 - y}Zn\sb{y})\sb3O\sb{6 …
-
The electrical and optical properties of doped yttrium aluminum garnets
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
-
Nanometer-thick yttrium iron garnet film development and spintronics-related study
… there has been a considerable interest in using yttrium iron garnet (Y3Fe5O12, YIG) materials for magnetic insulator-based spintronics studies. This interest derives from the fact that YIG materials have very low intrinsic damping. The development of YIG-based spintronics demands YIG films that …
-
Erbium-ytterbium-yttrium compounds for light emission at 1.54[mu]m
… oxide (Er.Yb2.0 3) and erbium-ytterbium-yttrium silicate (ErxYbYY 2 ,ySi 2O7 ) compounds are investigated as novel materials systems for the development of EDWAs. The high erbium and ytterbium solubility (>1022 cm-3) and refractive index (1.71 < n < 1.92) make these materials excellent …
-
Yttrium, Gadolinium, and Lutetium Based Endohedral Metallofullerenes: From Synthesis to Application
… of fullerene cage on the size and shape of the yttrium carbide cluster (Y2C2)4+ is investigated. It has also been established that the carbide cluster prefers a linear shape in sufficiently large fullerene cages but adopts a compressed butterfly shape in smaller cages where space is constrained. …
-
Microstructure and Texture of Yttrium-Nickel-Borocarbide and Samarium-Cobalt Thin Films
… is to study the microstrucutre and texture of Yttrium-Nickel- Borocarbide and Samarium-Cobalt thin film heterostructures prepared by Pulsed Laser Deposition and to establish structure-property relations for these materials in order to improve their properties and design new structures. …
-
Structural and magnetic properties of erbium thin films and erbium/yttrium superlattices
… systems are coherent through the nonmagnetic yttrium interlayers.
Page 1 of 10