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Wednesday, April 29, 2020 | History

2 edition of manufacture and neutron scattering study of some rare earth hydrides. found in the catalog.

manufacture and neutron scattering study of some rare earth hydrides.

David Geoffrey Hunt

manufacture and neutron scattering study of some rare earth hydrides.

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Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.)-University of Birmingham, Dept of Physics, 1973.

ID Numbers
Open LibraryOL21454481M

Future of Neutron Scattering at Oak Ridge National Laboratory: Three World Leading Neutron Scattering Facilities for Breakthrough Materials Science The mission of the Oak Ridge National Laboratory (ORNL) Neutron Sciences Directorate (NScD) is to answer big science questions about the fundamental nature of materials and energy, from atomic to. Hydrogenation leads to a notable lattice expansion and modification of magnetic properties. However, the impact of hydrogenation on magnetism is the opposite for 4f- and 5f-materials: TN(T{sub c})is lowered in the case of rare-earth hydrides, while for UNiAlH(D){sub x} it increases by an order of magnitude. High pressure science is a rapidly growing diverse fi. e1d. The high pressure technique has become a powerful tool for both the study and preparation of materials. In spi. te of the many high pressure conferences held in recent years, I felt that there was a need for scientists within a well-defined area (not bound merely by the common experimental technique) to meet in an atmosphere conducive. The short-range order and dynamics in crystalline alpha-TeO 2 have been investigated by neutron and X-ray total scattering and by Rietveld refinement of neutron diffraction data. The true lengths of the two bonds in a Te-O-Te bridge are (1) and (1) angstrom, and the high valence, , of the strong, short bond is balanced by the low.

Study of 2D Long-range Magnetic Order and Spin Correlations in Na2Ni2TeO6 Layered Compound by Polarized and Unpolarized Neutrons Scattering. Alexander Ovchinnikov. Ural Federal University, Russia Effect of Transition and Rare Earth Elements Doped Nano .


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manufacture and neutron scattering study of some rare earth hydrides. by David Geoffrey Hunt Download PDF EPUB FB2

Abstract. We have used neutron scattering to study the structure and magnetic ordering of a series of hydrides and deuterides of the rare earth-iron compounds RFe parent RFe 2 ’s have the cubic close packed Laves phase (C15) structure for R Heavier than Nd and order ferrimagnetically at ∿ K with the full free ion moment on each R and ∿μ B /Fe at by: 3.

Introduction. The interaction of hydrogen with the rare-earth metals has been the subject of numerous investigations due to the interesting temperature- and concentration-dependent structures and properties observed in the α-phase solid solutions as well as the various ordered hydride n scattering methods have been crucial for gaining a better understanding of the hydrogen Cited by: It has been shown by a neutron diffraction study [11] that the rare earth hydrides react with water (through humidity in the air), rather than oxygen, to form the hydroxide.

Great care was taken to assure minimal contamination, and a diffraction study of the sample after the main experiment revealed no noticeable by: 5.

A quaternary rare-earth intermetallic compound La 3 Co 29 Si 4 B 10 has been synthesized and the crystal and magnetic structures are investigated by neutron diffraction over the temperature range of 7 – by: 2.

The various techniques (neutron scattering, nuclear magnetic resonance, ion-beams, positron annihilation spectroscopy) are explained in detail, and a variety of examples of recent research projects are given to show the unique advantage of these techniques to study hydrogen in materials.

Volume Neutron Scattering in Earth Sciences Hans-Rudolf Wenk, editor i-xx + pages. ISBN ; ISBN13 For over half a century neutron scattering has added valuable information about the structure of materials. Neutron manufacture and neutron scattering study of some rare earth hydrides. book studies of 4f antiferromagnetic ordering in the rare earth high Tc superconductors is discussed in Chapter Following a brief summary of the neutron scattering cross section the and systems are discussed in turn, with the spin fluctuations in the superconductors as the main emphasis.

Neutron Scattering Cross SectionCited by: 6. Phase transformations in some rare earth-hydrogen systems. Journal of the Less Common Metals37 (3), DOI: /(74) P.

Vorderwisch, S. Hautecler. Inelastic Neutron Scattering by Cerium Hydrides I. by: new metal hydrides: a survey V.

Yartys’, I. Harris, and V. Panasyuk UDC ’11 We propose a survey of the studies carried out in the field of metal hydrides at the Karpenko Physico. By scattering alpha particles from gold, Rutherford showed the atomic nucleus to be very small relative to the atom and massive relative to the mass of an electron.

When Rutherford directed a stream of alpha particles at a gold foil, some particles. Neutron vibrational spectroscopy Data analysis. The contribution of the ‘fast neutrons’, i.e. the neutron background existing in the reactor hall, was subtracted from the raw data prior to the data evaluation.

The differential scattering cross section of the hydrogen atoms is given by ∂2σ ∂ω∂ =. : Neutron Applications in Earth, Energy and Environmental Sciences (Neutron Scattering Applications and Techniques) (): Liyuan Liang, Romano Rinaldi, Helmut Schober: Books.

The Fourteenth Rare Earth Research Conference was held June 28,at North Dakota State University in Fargo. The meeting was hosted by the College of Science and Mathematics and the Depart­ ment of Physics. Since the first conference was held insub­ sequent meetings have grown inBrand: Springer US.

Neutron scattering at high pressure. - Table I lists all the references, which we could find, on neutron scattering measurements at high pressure on rare earths. After the early work of Umbeyashi et al. on the ordering temperature and turn angle in several heavy rare earth metals, there was almost nothing.

Neutron Scattering: Applications in Chemistry, Materials Science and Biology, Vol provides an in-depth overview of the applications of neutron scattering in the fields of physics, materials science, chemistry, biology, the earth sciences, and engineering.

The book describes the tremendous advances in instrumental, experimental, and computational techniques over the past quarter-century. David Book is a Professor of Energy Materials and Head of the Hydrogen Materials Group.

Development of low or zero rare-earth content permanent magnets HW Langmi, A Walton and D Book () Dihydrogen in zeolite CaX—An inelastic neutron scattering study.

Journal of Alloys and Compounds ; PM Budd, A Butler, J Selbie, K. Neutron scattering has been used to examine Roman objects found under the A2 in Kent which have similarities to those found at Pompeii. Museums across Europe are using neutron techniques to understand how ancient Japanese swords were made during the 14th to 17th centuries.

Fresh thinking about the Battle of Towton is coming from neutron scattering. Maeland's 95 research works with 1, citations and reads, including: Characterization of Amorphous and Crystalline TiCuDx By Deuteron Magnetic Resonance. The heavy rare earth rich alloys remain in the h.c.p.

phase like the parent heavy rare earth metal and the magnetic properties are essentially those of a magnetic dilution system. The ordering temperatures 2 are shown to follow a power law with reduced de Gennes function in conation with many other rare earth.

Localized hydrogen vibration spectra have been measured for crystalline ZrNiH and Zr 2 NiH and amorphous ZrNiH and Zr 2 NiH by means of the time‐of‐flight neutron inelastic scattering experiment. Elastic scattering intensity has been also measured for amorphous ZrNi and ZrNiD It is concluded that the amorphous matrix mainly consists of tetrahedrons and hexahedrons, Cited by: 3.

The growing demand for electric energy will require expansion of the amount of nuclear power production in many countries of the world. Research and development in this field will continue to grow to further increase safety and efficiency of nuclear power generation.

Neutrons are a unique probe for a wide range of problems related to these efforts, ranging from crystal chemistry of nuclear Cited by: Neutron Scattering Characterization and Thermodynamic Modeling of Advanced Metal Hydrides for Reversible Hydrogen Storage Terrence J. Udovic National Institute of Standards & Technology Gaithersburg, MD This presentation does not contain any proprietary or confidential information # STP – A Participant in the DOE Metal Hydride Center of.

This book then explores several topics, including superconductors, phonon effects, electronic structure, A systematics, as well as disorder and transport. Other chapters discuss the interrelationships between superconductivity and magnetism. This text discusses as well the magnetic field dependent effects in the rare-earth ternary Edition: 1.

This book provides a comprehensive overview of the main nuclear characterization techniques used to study hydrogen absorption and desorption in materials. The various techniques (neutron scattering, nuclear magnetic resonance, ion-beams, positron annihilation spectroscopy) are explained in detail, and a variety of examples.

This classic text provides the basic quantum theory of thermal neutron scattering and applies the concepts to scattering by crystals, liquids and magnetic systems. Other topics discussed are the relation of the scattering to correlation functions in the scattering system, the dynamical theory of scattering and polarisation s: 1.

The neutron scattering community recognized the need for a second target station even as SNS was being built, anticipating growing demand for neutrons and an accelerating pace of discovery. Thus much of the facility’s infrastructure was designed to accommodate upgrades.

Application of Neutron Scattering in Earth Sciences H.-R. WENK1,2 1.—Department of Earth and Planetary Science, University of California, Berkeley, CAUSA. 2.—e-mail: [email protected] The unique properties of neutron interaction with materials have long been applied to the study of geological materials, with Shull and Smart using them.

Catching a glimpse at enzymes on the job: a combined time-resolved neutron scattering and fluorescence study. ; The Institut Laue-Langevin celebrates 50 years of scientific excellence. 19 January Neutrons reveal atomic hydrogen diffusion through ‘quantum tunnelling’ on graphene.

As an example, small-angle neutron scattering (SANS) is a widely-used neutron diffraction technique in which a highly-collimated neutron beam is focused onto a biological sample, often in some sort of solution, and the collected scattered light provides a wealth of.

Shaun Trevena (Engineering Honours student, Structural Study of Some rare-Earth Ferrates) Sam Brazier-Hollins (Engineering, Honours, Magnetic and Structural Characterisation of Metal Phosphorous Chalcogenides) Lachlan Henderson (Engineering, Honours, Synthesis and Characterisation of Rare-Earth Oxides).

The idea of this conference grew out of the rapidly increas­ ing volume of experimental facts. and theoretical concepts related to the problem of crystal-field effects in metals and alloys. The crystal field plays an important role in the understanding of the energetic level structure of ions in.

@article{osti_, title = {(Neutron scattering studies of the high-temperature superconducting materials)}, author = {Mook, Jr, H A}, abstractNote = {The traveler was given beam time at the ILL to continue neutron scattering work on high-temperature superconductivity.

The unique facilities at the ILL for both high-energy and low-energy neutron instrumentation made the experiments possible. Physics with neutrons Michael Leitner A The neutron1 is often followed in textbooks of neutron scattering, which consists in starting with the quantum-mechanical treatment of the scattering process and applying it to specific processes in the samples.

Instead, here we will start with the properties File Size: KB. The low-temperature magnetic properties of the rare-earth intermetallic compound system R3Pd20Si6 (R = rare earth) were studied by elastic and inelastic neutron scattering.

The compounds show due to the two rare-earth sublattices built from the 4a and 8c sites in the cubic crystal structure (space group Fm-3m) successive magnetic ordering with two different propagation by: 3. The theory of neutron scattering by paramagnetic rare-earth ions has been given by Trammell and more recently by Odiot and Saint-James.

Unlike the case for the iron-series transition metals, for which the orbital angular momentum of the 3d electrons is almost completely quenched, the magnetic scattering of neutrons from the rare earths (except for gadolinium and europium) arises from both Cited by: Effects of Electron Exciton Scattering --Crystal-Field Effects in the Transport Properties of Rare Earth Alloys --Short Range Van Vleck Antiferromagnetism in Superconducting La1-yTbySn3 Detected by Neutron Scattering --Session F: Magnetic Properties II --Crystal-Field Effects in Laves and other Rare Earth Iron and Rare Earth Cobalt Compounds.

REACT Rare Earth Alternatives in Critical Technologies The workshop “Neutron Scattering and High Magnetic Fields” was held Septemberat the Oak Ridge National Laboratory (ORNL).

The workshop was held in response to a recent report by the with neutron scattering measurements performed in high magnetic fields. The invited. Compton and Raman scattering. ' RARE EARTH METALS PREPARATION $, K. Gschneidner, Jr., B. Beaudry, P. Palmer Preparation of highly purified rare earth fluorides from the oxides; preparation of single crystals of rare earth fluorides, metals, and special alloys.

Small angle neutron scattering in Earth Science - the Mildner legacy a.m. Morning Break a.m. Bruce Gaulin (McMaster University) Frustrated Magnetism Seen Through the Lens of DCS a.m.

Noboru Wada (Toyo University) Quasi-elastic and inelastic neutron scattering studies of layered silicates and zeolites. a.m. Lunch. Gen Shirane, who pioneered and became one of the world’s leading experts in the use of neutron-scattering to study the properties of materials, received a Bachelor of Engineering degree in and his Ph.D.

in Physics in from the University of Tokyo. His doctoral thesis was on ferroelectricity—the study of materials that exhibit a. We have observed the charge and the magnetic ordering in La 2-x Sr x NiO 4 (≤x≤) by neutron scattering.

In the c-plane, holes and spins order as a two-dimensional system, where holes form stripes and they are inserted into the antiferromagnetic by: 4.Plastic manufacturing is an energy-intensive process.

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