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Hokkaido University Collection of Scholarly and Academic Papers (53.434 recursos)
HUSCAP (Hokkaido University Collection of Scholarly and Academic Papers) contains peer-reviewed journal articles, proceedings, educational resources and any kind of scholarly works of Hokkaido University.

Mostrando recursos 1 - 20 de 48

1. Fast switching of light propagation in a photorefractive crystal via Pockels effect - Xie, Ping; Mishima, Teruhito; ??, ??
We experimentally demonstrate fast switching of light propagation and phase conjugate generation in a BaTiO3:Ce crystal with a high efficiency.

2. Electron acceleration in gas by impulse electric field and its application to selective promotion of an electron–molecule reaction - Sugawara, Hirotake; Sakai, Yosuke; ??, ??
We have simulated electron acceleration under short intense impulse electric fields of 0.1–1 kV cm-1 strength and ~1 ns duration in N2 at 65.5 Pa.

3. Two-peaked velocity distribution function of electrons in carbon tetrafluoride in crossed electric and magnetic fields - Sugawara, Hirotake; Oda, Akinori; Sakai, Yosuke; ??, ??
Monte Carlo simulation shows that the electron velocity distribution function (EVDF) in CF4 in crossed electric and magnetic fields (ExB fields) has two peaks at low E/B values.

4. Barrier effect of collisional processes on electron swarms in nitrogen - Sugawara, Hirotake; Satoh, Kohki; Sakai, Yosuke; ??, ??
The electron velocity distribution function (EVDF) of electron swarms in N2 has a constricted part at an electron energy of around 2-3 eV.

5. Effect of near-threshold ionization on electron attachment in gaseous dielectrics - Sugawara, Hirotake; Ishigaki, Takuya; Hirochi, Yuuki; Sakai, Yosuke; ??, ??
It has been predicted that near-threshold ionization (NTI) in a gaseous dielectric inhibits the development of electron avalanche when the gaseous dielectric has a sufficient capability for low-energy electron attachment.

6. Predicting the amount of carbon in carbon nanotubes grown by CH4 rf plasmas - Okita, Atsushi; Suda, Yoshiyuki; Ozeki, Atsushi; Sugawara, Hirotake; Sakai, Yosuke; ??, ??
Carbon nanotubes (CNTs) were grown on Si substrates by rf CH4 plasma-enhanced chemical vapor deposition in a pressure range of 1–10 Torr, and then characterized by scanning electron microscopy.

7. The drift velocity vector of electron swarms in crossed electric and magnetic fields - Sugawara, Hirotake; Yahata, Takashi; Oda, Akinori; Sakai, Yosuke; ??, ??
We calculated the drift velocity vector W of electron swarms in crossed electric and magnetic fields using a Monte Carlo method.

8. A subthreshold MOS neuron circuit based on the Volterra system - Asai, Tetsuya; Kanazawa, Yusuke; Amemiya, Yoshihito; ??, ??
We present an analog neuron circuit consisting of a small number of metal-oxide semiconductor (MOS) devices operating in their subthreshold region.

9. Analog integrated circuits for the Lotka-Volterra competitive neural networks - Asai, Tetsuya; Ohtani, Masashiro; Yonezu, Hiroo; ??, ??
A subthreshold MOS integrated circuit (IC) is designed and fabricated for implementing a competitive neural network of the Lotka-Volterra (LV) type which is derived from conventional membrane dynamics of neurons and is used for the selection of external inputs.

10. A three-valued D-flip-flop and shift register using multiple-junction surface tunnel transistors - Uemura, T; Baba, T; ??, ??
A three-valued D-flip-flop (D-FF) circuit and a two-stage shift register built from InGaAs-based multiple-junction surface tunnel transistors (MJSTT) and Si-based metal-oxide-semiconductor field effect transistors (MOSFET) have been demonstrated.

11. Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter - Uemura, T; Marukame, T; Yamamoto, M; ??, ??
A novel spin filter consisting of a triple-barrier resonant tunneling system in the form F/I/N/I/F/I/F is proposed, where F, I, and N represent a ferromagnetic material, an insulator, and a nonmagnetic material, respectively.

12. Spin-glass behavior in CoSt2 Langmuir-Blodgett multilayer films - Hatta, E.; Maekawa, T.; Mukasa, K.; Shimoyama, Y.; ??, ??
The dc susceptibilities have been measured on cobalt stearate (CoSt2) Langmuir-Blodgett (LB) multilayer films.

13. Topological manifestations of surface-roughening collapse in Langmuir monolayers - Hatta, E.; Nagao, J.; ??, ??
In contrast to the random network crack pattern, the surface-roughening crack pattern grows on a much longer time scale and on a much shorter length scale.

14. Tunneling through a narrow-gap semiconductor with different conduction- and valence-band effective masses - Hatta, E.; Nagao, J.; Mukasa, K.; ??, ??
We have calculated tunneling conductance in metal–narrow-gap-semiconductor (NGS)–metal tunnel junctions.

15. The spatio-temporal development of electron swarms in gases: moment equation analysis and Hermite polynomial expansion - Sugawara, Hirotake; Sakai, Y; Tagashira, H; Kitamori, K
When the moments up to a suecient order are calculated, the spatialdistribution function of electrons, p(x), can be constructed by an expansion techniqueusing Hermite polynomials and the weights of the Hermite components are representedin terms of the electron diausion coeecients.

16. Spin-polarized scanning tunneling microscopy and spectroscopy study of c(2x2) reconstructed Cr(001) thin film surfaces - Oka, Hirofumi; Sueoka, Kazuhisa
Spin dependent electronic properties of c(2x2) Cr(001) thin film surfaces grown on MgO(001) substrates are investigated by means of spin-polarized scanning tunneling microscopy and spectroscopy.

17. An analysis of transverse evolution of electron swarms in gases using moment equations and a propagator method - Sugawara, Hirotake; Sakai, Yosuke
A simulation technique for analysis of transverse evolution of electronswarms in gases was developed based onmoment equations derived from the Boltzmannequation.

18. Tunnel magnetoresistance in epitaxial magnetic tunnel junctions using full-Heusler alloy Co2MnGe thin film and MgO tunnel barrier - Marukame, Takao; Ishikawa, Takayuki; Matsuda, Ken-ichi; Uemura, Tetsuya; Yamamoto, Masafumi
We fabricated fully epitaxial magnetic tunnel junctions (MTJs) using a Co-based full-Heusler alloy Co2MnGe (CMG) thin film as a lower electrode, an MgO tunnel barrier, and a Co50Fe50 upper electrode and investigated their tunnel magnetoresistance (TMR) characteristics.

19. Structural and magnetic properties of epitaxially grown full-Heusler alloy Co2MnGe thin films deposited using magnetron sputtering - Ishikawa, Takayuki; Marukame, Takao; Matsuda, Ken-ichi; Uemura, Tetsuya; Arita, Masashi; Yamamoto, Masafumi
Full-Heusler alloy Co2MnGe thin films were epitaxially grown on MgO (001) substrates using magnetron sputtering.

20. Properties of electron swarms in gases in the upstream region of an electron source - Sugawara, H.; Sakai, Y.; Tagashira, H.
Exponential spatial growth of electron swarms in gases under steady-stateTownsend conditions may be observed not only in the downstream region of an electronsource but also in the upstream region due to backward diffusion.

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