Filters
Results 1 - 10 of 10931
Results 1 - 10 of 10931.
Search took: 0.05 seconds
Sort by: date | relevance |
Siders, J.L.W.; Trugman, S.A.; Houlton, R.J.; Garzon, F.H.; Taylor, A.J.
Los Alamos National Lab., NM (United States). Funding organisation: USDOE Assistant Secretary for Human Resources and Administration, Washington, DC (United States)1998
Los Alamos National Lab., NM (United States). Funding organisation: USDOE Assistant Secretary for Human Resources and Administration, Washington, DC (United States)1998
AbstractAbstract
[en] The authors describe here the first observation of terahertz emission from unbiased YBa2Cu3O7-δ (YBCO) thin films. These films are excited by 150 fs, 1.5 eV and 3.0 eV, optical pulses for a range of temperatures, T, 4 K < T < 300 K and for a range of oxygen doping from optimally-doped (δ = 0) to insulating (δ = 0.8). They demonstrate that this emission is generated by optical rectification due to the bulk electric quadrupole source term, comprising the first observation of such a source term in terahertz emission
Primary Subject
Source
Mar 1998; 9 p; Nuclear energy assembly; San Francisco, CA (United States); 13-15 May 1998; CONF-980511--; CONTRACT W-7405-ENG-36; ALSO AVAILABLE FROM OSTI AS DE98004479; NTIS; US GOVT. PRINTING OFFICE DEP
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Bismuth-based superconductors ar now thoroughly studied and are thought to be one of the best High Critical Temperature Superconductors (HSTC) that could be industrially developed. Though their synthesis is one of the easiest to achieve, their strong anisotropy affects drastically their transport properties under magnetic field, especially in the low field regime. In order to avoid vortices motion, two main methods have been used to introduce pinning centers: irradiation defects or dissemination of non-superconducting particles. An original method of synthesis has been developed in our laboratories, alternating electrolytic depositions and heat treatments with which one can obtain Bi 2212 tapes on silver substrate. Though we have good performances at 77 K, the Jc drops by a factor of 5 at 7 T for B parallel to c-axis. By including Ag, MgO and ZrO2 particles, we tried to introduce efficient pinning centers in the superconducting matrix. Some of these dopants played also a role on intergranular connectivity. By magnetisation and transport studies, we have been able to improve the situation in these two fields. (author)
Original Title
Influence du dopage sur les proprietes de transport et d'aimantation de rubans polycristallins de Bi 2212 - ancrage de vortex
Primary Subject
Source
1998; 226 p; 195 refs.
Record Type
Report
Report Number
Country of publication
ALKALINE EARTH METAL COMPOUNDS, CHALCOGENIDES, CRYSTAL STRUCTURE, ELASTOMERS, ELEMENTS, MAGNESIUM COMPOUNDS, MAGNETIC MOMENTS, MAGNETIC PROPERTIES, METALS, MICROSTRUCTURE, ORGANIC COMPOUNDS, ORGANIC POLYMERS, OXIDES, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, POLYMERS, SUPERCONDUCTORS, SYNTHESIS, TEMPERATURE RANGE, TRANSITION ELEMENT COMPOUNDS, TRANSITION ELEMENTS, ZIRCONIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
Golnik, N.; Mika, J.R.; Wieteska, K. (eds.); Institute of Atomic Energy, Otwock-Swierk (Poland); 161 p; 1998; p. 54; 1 ref., 1 fig
Record Type
Miscellaneous
Literature Type
Progress Report
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Tezuka, K.; Hinatsu, Y.; Nakamura, Akio; Inami, Toshiya; Shimojo, Yutaka; Morii, Yukio
Progress report on neutron scattering research (April 1, 1997 - March 31, 1998)1999
Progress report on neutron scattering research (April 1, 1997 - March 31, 1998)1999
AbstractAbstract
No abstract available
Primary Subject
Source
Suzuki, Jun-ichi; Fujiwara, Satoru; Aizawa, Kazuya (eds.); Japan Atomic Energy Research Inst., Tokyo (Japan); 133 p; Feb 1999; p. 73
Record Type
Report
Report Number
Country of publication
ALKALINE EARTH METAL COMPOUNDS, CHROMIUM COMPOUNDS, COHERENT SCATTERING, CRYSTAL LATTICES, CRYSTAL STRUCTURE, DIFFRACTION, MAGNETIC MOMENTS, MAGNETIC PROPERTIES, MAGNETISM, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, RARE EARTH COMPOUNDS, SCATTERING, THERMODYNAMIC PROPERTIES, TRANSITION ELEMENT COMPOUNDS, TRANSITION TEMPERATURE
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Gardner, J.S.; Lumsden, M.D.; Raju, N.P.; Gaulin, B.D.
Dynamical properties of unconventional magnetic systems1997
Dynamical properties of unconventional magnetic systems1997
AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
Helgesen, G. (ed.); Institutt for Energiteknikk, Kjeller (Norway); 98 p; ISBN 82-7017-167-0;
; ISSN 0333-2039;
; May 1997; p. 45-46; NATO Advanced Study Institute; Geilo (Norway); 2-12 Apr 1997; 3 refs. 1 fig.


Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Fleetwood, D.M.; Reber, R.A.; Riewe, L.C.; Winokur, P.S.
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States). Funding organisation: USDOE (United States)1999
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States). Funding organisation: USDOE (United States)1999
AbstractAbstract
[en] Thermally stimulated current (TSC) techniques provide information about oxide-trap charge densities and energy distributions in MOS capacitors exposed to ionizing radiation or high-field stress that is difficult or impossible to obtain via standard capacitance-voltage or current-voltage techniques. The precision and reproducibility of measurements through repeated irradiation/TSC cycles on a single capacitor is demonstrated with a radiation-hardened oxide, and small sample-to-sample variations are observed. A small increase in E5' center density may occur in some non-radiation-hardened oxides during repeated irradiation/TSC measurement cycles. The importance of choosing an appropriate bias to obtain accurate measurements of trapped charge densities and energy distributions is emphasized. A 10 nm deposited oxide with no subsequent annealing above 400 ampersand deg;C shows a different trapped-hole energy distribution than thermally grown oxides, but a similar distribution to thermal oxides is found for deposited oxides annealed at higher temperatures. Charge neutralization during switched-bias irradiation is found to occur both because of hole-electron annihilation and increased electron trapping in the near-interfacial Si02. Limitations in applying TSC to oxides thinner than 5 nm are discussed
Primary Subject
Source
Microelectronics Reliability; 10 Jun 1999; 46 p; CONTRACT AC04-94AL85000; ALSO AVAILABLE FROM OSTI AS DE00007863; NTIS; US GOVT. PRINTING OFFICE DEP; Preprint
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Christen, D.K.; Feenstra, R.; Kroeger, D.M.; Lee, D.F.; List, F.A.; Martin, P.M.; Norton, D.P.; Paranthaman, M.; Park, C.; Royal, A.; Specht, E.D.; Verebelyi, D.T.
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Funding organisation: USDOE Office of Energy Efficiency and Renewable Energy (Estonia); USDOE Office of Science (United States); USDOE Office of Utility Technologies (United States)1999
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Funding organisation: USDOE Office of Energy Efficiency and Renewable Energy (Estonia); USDOE Office of Science (United States); USDOE Office of Utility Technologies (United States)1999
AbstractAbstract
[en] High critical current YBa2Cu3O7-y (referred to as YBCO) coated conductors were fabricated with a layer sequence of YBCO/YSZ/CeO2/Ni. The cube (100) texture in the starting Ni substrates was obtained by cold rolling followed by recrystallization. A thin CeO2 (Cerium Oxide) layer with a thickness of 100-200 was grown epitaxially on the biaxially textured-Ni substrates using an e-beam evaporation technique. This was followed by the growth of a thick (<= 0.77 m) YSZ (Yttria Stabilized Zirconia) layer using either e-beam evaporation or rf magnetron sputtering. The e-beam CeO2 film had a dense microstructure. The microstructure of the e-beam YSZ film was porous whereas the sputtered YSZ film was dense. The YBCO films were grown by pulsed laser deposition on both e-beam and sputtered YSZ layers. A transport critical current density of 1 x l06 A/cm2 at 77 K was obtained for 0.8 m thick YBCO Rims on both YSZ surfaces in zero field. To demonstrate the quality and compatibility of the e-beam CeO2 layers; YBCO films were also grown on CeO2-buffered YSZ (100) single crystal substrates using e-beam co-evaporated Y-BaF2-Cu precursors followed by a post-annealing process. A transport critical current density of over 1 x lO6A/cm2 at 77 K was obtained on a 0.3 m thick YBCO film in zero field
Primary Subject
Source
1 Jun 1999; 8 p; 9. CIMTEC-World Forum on New Materials; Florence (Italy); Jun 1998; CONTRACT AC05-96OR22464; ALSO AVAILABLE FROM OSTI AS DE00009292; NTIS; US GOVT. PRINTING OFFICE DEP; KC 02 03 01 0; EB 50 01 00 0
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Moss, S.D.; Wang, W.G.; Dou, S.X.; Weinstein, R.
10th Australian conference on nuclear techniques of analysis. Proceedings1998
10th Australian conference on nuclear techniques of analysis. Proceedings1998
AbstractAbstract
[en] It is demonstrated that a combination of neutron irradiation with uranium doping introduce fission tracks through a Bi-2223 tape which act as effective pinning centres, leading to a substantial increase in critical current. Preliminary data suggests that the combination of uranium doping and neutron irradiation produces improved flux pinning in Bi-2223 tapes over neutron irradiation alone. Before irradiation, SEM, DTA and XRD analyses were performed on the tapes. Both before and after irradiation the trapped maximum magnetic flux was measured at 77K. Before neutron irradiation, uranium doping has no effect on critical current. Preliminary SEM data suggested that the uranium is homogeneously distributed throughout the oxide core of the tape. The presence of 2212 and other secondary phases in the doped tapes suggest further refinement of the sintering procedure is necessary. (authors)
Primary Subject
Secondary Subject
Source
Australian Institute of Nuclear Science and Engineering, Lucas Heights, NSW (Australia). Funding organisation: Australian Institute of Nuclear Science and Engineering, Lucas Heights, NSW (Australia); Vacuum Society of Australia (Australia); Australian National Univ., Canberra, ACT (Australia); 244 p; 1998; p. 230-232; 10. Australian conference on nuclear techniques of analysis; Canberra, ACT (Australia); 24-26 Nov 1997; Extended abstract. 3 refs., 1 tab. 2 figs.
Record Type
Miscellaneous
Literature Type
Conference; Numerical Data
Report Number
Country of publication
BISMUTH OXIDES, CALCIUM OXIDES, COPPER OXIDES, CURRENT DENSITY, DOPED MATERIALS, EXPERIMENTAL DATA, FAST NEUTRONS, FISSION FRAGMENTS, IRRADIATION, LEAD OXIDES, MAGNETIC FLUX, NEUTRON BEAMS, RADIATION EFFECTS, SINTERING, STRONTIUM OXIDES, STRUCTURAL CHEMICAL ANALYSIS, SUPERCONDUCTING COMPOSITES, SUPERCONDUCTIVITY, URANIUM 235, URANIUM OXIDES
ACTINIDE COMPOUNDS, ACTINIDE NUCLEI, ALKALINE EARTH METAL COMPOUNDS, ALPHA DECAY RADIOISOTOPES, BARYONS, BEAMS, BISMUTH COMPOUNDS, CALCIUM COMPOUNDS, CHALCOGENIDES, COMPOSITE MATERIALS, COPPER COMPOUNDS, DATA, ELECTRIC CONDUCTIVITY, ELECTRICAL PROPERTIES, ELEMENTARY PARTICLES, EVEN-ODD NUCLEI, FABRICATION, FERMIONS, HADRONS, HEAVY NUCLEI, INFORMATION, INTERNAL CONVERSION RADIOISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LEAD COMPOUNDS, MATERIALS, MINUTES LIVING RADIOISOTOPES, NEUTRONS, NUCLEAR FRAGMENTS, NUCLEI, NUCLEON BEAMS, NUCLEONS, NUMERICAL DATA, OXIDES, OXYGEN COMPOUNDS, PARTICLE BEAMS, PHYSICAL PROPERTIES, RADIOISOTOPES, SPONTANEOUS FISSION RADIOISOTOPES, STRONTIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, URANIUM COMPOUNDS, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Eremenko, V.V.; Matsievskij, K.M.; Ponomarchuk, V.L.
Abstracts of 19-th all-union conference on physics of magnetic phenomena. Part 21991
Abstracts of 19-th all-union conference on physics of magnetic phenomena. Part 21991
AbstractAbstract
No abstract available
Original Title
Magnitnaya sverkhtonkaya struktura VTSP YBa(CuFe)O
Primary Subject
Source
AN SSSR, Moscow (Russian Federation). Nauchnyj Sovet po Probleme Magnetizm; AN SSSR, Sverdlovsk (Russian Federation). Inst. Fiziki Metallov; Tashkentskij Gosudarstvennyj Univ., Tashkent (Uzbekistan); 207 p; Sep 1991; p. 32; 19. all-union conference on physics of magnetic phenomena; Tashkent (Uzbekistan); 24-27 Sep 1991
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Degueldre, C.; Heimgartner, P.; Graber, T.; Takano, Masahide; Ohmichi, Toshihiko; Fukuda, Kousaku.
Japan Atomic Energy Research Inst., Tokyo (Japan)1997
Japan Atomic Energy Research Inst., Tokyo (Japan)1997
AbstractAbstract
[en] Thermal conductivity of zirconia based inert matrix and analogous fuel materials were measured and modelled. Measurements were performed using the laser flash method and systematically applied for binary and ternary zirconia-yttria-erbia as well as quaternary systems including thoria or ceria. Measurements were carried out from room temperature to 1250 K. Thermal conductivity was also modelled taking into account the dopant effect on the lattice parameter of the cubic solid solution, the oxygen vacancy size and their concentration. Experimental and modelled lattice parameter values are compared prior to full justification of the results. In the temperature range from 300 to 950 K, the thermal conductivity of the single phase solid solution with yttria, erbia and ceria as analogous fuel material is about 2 W·m-1K-1. Energy transfer in these materials is discussed on the basis of both photonic and phononic conductivities. (author)
Primary Subject
Source
Nov 1997; 25 p
Record Type
Report
Report Number
Country of publication
ACTINIDE COMPOUNDS, CERIUM COMPOUNDS, CHALCOGENIDES, COLLISIONS, ENERGY SOURCES, FUELS, MATERIALS, NUCLEAR FUELS, OXIDES, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, PLUTONIUM COMPOUNDS, PLUTONIUM OXIDES, QUASI PARTICLES, RARE EARTH COMPOUNDS, REACTOR MATERIALS, SOLID FUELS, TEMPERATURE RANGE, THERMODYNAMIC PROPERTIES, THORIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, TRANSURANIUM COMPOUNDS, YTTERBIUM COMPOUNDS, ZIRCONIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |