Refine your search:     
Report No.
 - 
Search Results: Records 1-4 displayed on this page of 4
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Extremely large and anisotropic upper critical field and the ferromagnetic instability in UCoGe

Aoki, Dai*; Matsuda, Tatsuma; Taufour, V.*; Hassinger, E.*; Knebel, G.*; Flouquet, J.*

Journal of the Physical Society of Japan, 78(11), p.113709_1 - 113709_4, 2009/11

 Times Cited Count:119 Percentile:95.54(Physics, Multidisciplinary)

Magnetoresistivity measurements with fine tuning of the field direction on high quality single crystals of the ferromagnetic superconductor UCoGe show anomalous anisotropy of the upper critical field $$H_{rm c2}$$. $$H_{rm c2}$$ for $$H||b$$-axis ($$H_{rm c2}^b$$) in the orthorhombic crystal structure is strongly enhanced with decreasing temperature with an S-shape and reaches nearly 20 T at 0 K. The temperature dependence of $$H_{rm c2}^a$$ shows upward curvature with a low temperature value exceeding 30 T, while $$H_{rm c2}^c$$ at 0K is very small ($$sim$$0.6 T).Contrary to conventional ferromagnets, the decrease of the Curie temperature with increasing field for $$H||$$$$b$$-axis marked by an enhancement of the effective mass of the conduction electrons appears to be the origin of the S-shaped $$H_{rm c2}^b$$ curve. These results indicate that the field-induced ferromagnetic instability or magnetic quantum criticality reinforces superconductivity.

Journal Articles

A Three-dimensional neutronics-thermohydraulics simulation of core disruptive accident in sodium-cooled fast reactor

Yamano, Hidemasa; Tobita, Yoshiharu; Fujita, Satoshi

Nuclear Engineering and Design, 239(9), p.1673 - 1681, 2009/09

 Times Cited Count:11 Percentile:62.13(Nuclear Science & Technology)

The SIMMER-III code is a two-dimensional, multi-velocity-field, multi-phase, multi-component, Eulerian, fluid-dynamics code coupled with a fuel-pin model and a space- and energy-dependent neutron transport kinetics model. Since SIMMER-III is expected to become a standard tool for fast reactor safety analysis with likely application to licensing calculations, the code must be demonstrated to be sufficiently robust and reliable. For this purpose, a systematic assessment program of the code has been conducted in cooperation with European partners. The development of SIMMER-IV has been performed to be a direct extension of SIMMER-III to three dimensions. Recently, the parallelization of SIMMER-IV has been made to allow applications to reactor calculation within available computational resource. A three-dimensional calculation with SIMMER-IV is presented to indicate more realistic accident scenario.

Journal Articles

Magnetization dynamics in the normal and superconducting phases of UPd$$_2$$Al$$_3$$, 1; Surveys in reciprocal space using neutron inelastic scattering

Hiess, A.*; Bernhoeft, N.*; Metoki, Naoto; Lander, G.*; Roessli, B.*; Sato, Noriaki*; Aso, Naofumi*; Haga, Yoshinori; Koike, Yoshihiro*; Komatsubara, Takemi*; et al.

Journal of Physics; Condensed Matter, 18(27), p.R437 - R451, 2006/07

 Times Cited Count:31 Percentile:33.53(Physics, Condensed Matter)

This topical review presents results from neutron inelastic scattering experiments on single crystals of UPd$$_2$$Al$$_3$$. We present a detailed and complete characterization of the wave vector- and energy-dependent magnetization dynamics in UPd$$_2$$Al$$_3$$ as measured by neutron inelastic scattering primarily in the form of extensive surveys in energy-momentum space under a wide range of experimental conditions, and put our observations in context with data that has been published previously by two independent groups. This study yields unique insight into the low-temperature ground state, which exhibits a microscopic coexistence of antiferromagnetism and superconductivity, makingUPd$$_2$$Al$$_3$$ one of the most accessible heavy-fermion superconductors that can be fully characterized by neutron spectroscopy.

Oral presentation

Renewed polarized neutron options on the triple-axis spectrometer TAS-1 at JAEA

Takeda, Masayasu; Nakamura, Mitsutaka; Kakurai, Kazuhisa; Leli$`e$vre-Berna, E.*; Tasset, F.*; Regnault, L.-P.*

no journal, , 

no abstracts in English

4 (Records 1-4 displayed on this page)
  • 1