Research Output 1979 2019

1979

On the broadening of the vortex width in a long Josephson tunnel junction

Enpuku, K., Yoshida, K. & Irie, F., Jun 11 1979, In : Physics Letters A. 72, 1, p. 42-44 3 p.

Research output: Contribution to journalArticle

tunnel junctions
vortices
Josephson junctions
boundary conditions
1980
10 Citations (Scopus)

Microwave-induced vortex motion in long Josephson junctions

Hamasaki, K., Yoshida, K., Irie, F., Enpuku, K. & Inoue, M., Jan 1 1980, In : Japanese Journal of Applied Physics. 19, 1, p. 191-198 8 p.

Research output: Contribution to journalArticle

Josephson junctions
Vortex flow
Microwaves
vortices
microwaves
10 Citations (Scopus)

Vortex Motion Modulated by a Self Field in a Large Josephson Junction

Enpuku, K., Yoshida, K., Irie, F. & Hamasaki, K., Jan 1 1980, In : IEEE Transactions on Electron Devices. 27, 10, p. 1973-1978 6 p.

Research output: Contribution to journalArticle

Vortex flow
Fluxes
Surface resistance
Magnetic fields
Electrodes
1981
8 Citations (Scopus)

Amplitude-dependent velocity of vortices in long Josephson junctions estimated from microwave-induced dc voltages

Hamasaki, K., Enpuku, K., Irie, F. & Yoshida, K., Dec 1 1981, In : Journal of Applied Physics. 52, 11, p. 6816-6823 8 p.

Research output: Contribution to journalArticle

Josephson junctions
vortices
microwaves
electric potential
magnetic fields
3 Citations (Scopus)

Effects of microshorts on current-voltage characteristics of josephson tunnel junctions

Enpuku, K., Yoshida, K., Hamasaki, K. & Irie, F., Jan 1 1981, In : Japanese Journal of Applied Physics. 20, 1, p. 265-275 11 p.

Research output: Contribution to journalArticle

Tunnel junctions
Current voltage characteristics
tunnel junctions
Magnetic fields
electric potential
25 Citations (Scopus)

Self-resonant current steps of Josephson tunnel junctions in the presence of multimode oscillation

Enpuku, K., Yoshida, K. & Irie, F., Dec 1 1981, In : Journal of Applied Physics. 52, 1, p. 344-351 8 p.

Research output: Contribution to journalArticle

tunnel junctions
oscillations
self oscillation
penetration
electric potential
1982
2 Citations (Scopus)

Capacitance measurement of Josephson tunnel junctions with microwave-induced dc quasiparticle tunneling currents

Hamasaki, K., Yoshida, K., Irie, F. & Enpuku, K., Dec 1 1982, In : Journal of Applied Physics. 53, 5, p. 3713-3718 6 p.

Research output: Contribution to journalArticle

tunnel junctions
capacitance
microwaves
impedance
microwave circuits
3 Citations (Scopus)

Current-waveform dependence of punchthrough probability in a Josephson tunnel junction

Enpuku, K., Irie, F., Nagatsuma, T. & Yoshida, K., 1982, In : Journal of Applied Physics. 53, 12, p. 8894-8900 7 p.

Research output: Contribution to journalArticle

tunnel junctions
waveforms
logic
computerized simulation

Fabrication of PblnAu Josephson Tunnel Junctions and Evaluation of their Basic Properties

Uchida, N., Enpuku, K., Irie, F. & Yoshida, K., Jan 1 1982, In : Shinku. 25, 9, p. 613-623 11 p.

Research output: Contribution to journalArticle

Tunnel junctions
Current voltage characteristics
tunnel junctions
Oxides
Fabrication
1 Citation (Scopus)

Measurement of amplitude-dependent velocity of a vortex train in a long Josephson tunnel junction

Yoshida, K., Hamasaki, K., Enpuku, K. & Irie, F., Jan 1 1982, In : Physica B+C. 109-110, C, p. 2052-2054 3 p.

Research output: Contribution to journalArticle

Tunnel junctions
Vortex flow
Electric potential
1983
146 Citations (Scopus)

Flux-flow type Josephson oscillator for millimeter and submillimeter wave region

Nagatsuma, T., Enpuku, K., Irie, F. & Yoshida, K., Dec 1 1983, In : Journal of Applied Physics. 54, 6, p. 3302-3309 8 p.

Research output: Contribution to journalArticle

submillimeter waves
millimeter waves
oscillators
tunnel junctions
magnetic fields
8 Citations (Scopus)

FLUX-FLOW TYPE JOSEPHSON OSCILLATOR WITH A COUPLING CIRCUIT TO A QUASIPARTICLE DETECTOR.

Nagatsuma, T., Enpuku, K., Irie, F. & Yoshida, K., Nov 1983, In : Transactions of the Institute of Electronics and Communication Engineers of Japan. Section E. E66, 11, p. 680-681 2 p.

Research output: Contribution to journalArticle

Coupled circuits
Strip telecommunication lines
Millimeter waves
Magnetic fields
Fluxes
18 Citations (Scopus)

Flux trapping in Josephson tunnel junctions

Uchida, N., Enpuku, K., Matsugaki, Y., Tomita, S., Irie, F. & Yoshida, K., Dec 1 1983, In : Journal of Applied Physics. 54, 9, p. 5287-5292 6 p.

Research output: Contribution to journalArticle

tunnel junctions
trapping
critical current
electrodes
retarding
2 Citations (Scopus)

Megahertz dc-to-dc converters controlled by an amorphous core

Harada, K., Sakamoto, H., Sasada, I. & Shoyama, M., Jan 1 1983, In : IEEE Transactions on Magnetics. 19, 5, p. 2082-2084 3 p.

Research output: Contribution to journalArticle

Multivibrators
Networks (circuits)
Bipolar transistors
Transistors
Feedback
1984
1 Citation (Scopus)

A practical in situ wire: a composite wire with many in situ processed Nb3Sn cores of an internal diffusion type

Yamafuji, K., Sumiyoshi, F., Akenaga, Y., Iwakuma, M., Onodera, R. & Mori, N., Jan 1 1984, In : Cryogenics. 24, 4, p. 191-199 9 p.

Research output: Contribution to journalArticle

Cable cores
wire
Wire
composite materials
Composite materials

ESTIMATION OF THE CRITICAL-CURRENT DENSITY DISTRIBUTION IN JOSEPHSON TUNNEL JUNCTIONS.

Yoshida, K., Uchida, N., Enpuku, K., Tanaka, T. & Irie, F., Dec 1 1984, Unknown Host Publication Title. pt 1 ed. North-Holland, p. 471-472 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tunnel junctions
Critical currents
Spatial distribution
Current density
91 Citations (Scopus)

Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. II. Modeling

Nagatsuma, T., Enpuku, K., Yoshida, K. & Irie, F., Dec 1 1984, In : Journal of Applied Physics. 56, 11, p. 3284-3293 10 p.

Research output: Contribution to journalArticle

submillimeter waves
millimeter waves
oscillators
output
electric potential

Flux-Trapping Characteristics of Pb-alloy Superconducting Thin Films for Josephson Tunnel Junctions

Uchida, N., Enpuku, K., Yoshida, K. & Irie, F., Jan 1 1984, In : Shinku. 27, 8, p. 667-677 11 p.

Research output: Contribution to journalArticle

Flux pinning
Superconducting films
Tunnel junctions
tunnel junctions
trapping

Identification of load characteristics of power systems using GMDH

Sagara, S., Murata, J. & Kishimoto, K., Jan 1 1984, In : Electrical Engineering in Japan. 104, 3, p. 134-143 10 p.

Research output: Contribution to journalArticle

Identification of Load Characteristics of Power Systems Using GMDH

Sagara, S., Murata, J. & Kishimoto, K., Jan 1 1984, In : The transactions of the Institute of Electrical Engineers of Japan.C. 104, 7, p. 173-180 8 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

JOSEPHSON NDRO MEMORY CELL WITH A DIRECT-COUPLED SENSE GATE.

Enpuku, K., Sueoka, K., Yoshida, K. & Irie, F., Jan 1 1984, In : Transactions of the Institute of Electronics and Communication Engineers of Japan. Section E. E67, 6, p. 331-332 2 p.

Research output: Contribution to journalArticle

Data storage equipment
Magnetic couplings
Electric current control
Magnetic flux
Equivalent circuits
10 Citations (Scopus)

Magnetic-flux trapping characteristics of thin-film Pb alloys as electrodes of Josephson junctions

Uchida, N., Enpuku, K., Yoshida, K. & Irie, F., Dec 1 1984, In : Journal of Applied Physics. 56, 9, p. 2558-2565 8 p.

Research output: Contribution to journalArticle

Josephson junctions
magnetic flux
trapping
electrodes
thin films

MEASUREMENT OF TRAPPED MAGNETIC-FLUX DISTRIBUTION IN A SUPERCONDUCTING THIN FILM WITH AN ARRAY OF JOSEPHSON TUNNEL JUNCTIONS.

Yoshida, K., Uchida, N., Enpuku, K. & Irie, F., 1984, Unknown Host Publication Title. pt 2 ed. North-Holland, p. 911-912 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Superconducting films
Tunnel junctions
Magnetic flux
Magnetic sensors
Spatial distribution

MINIMUM CURRENT OF A TWO-JUNCTION SQUID GATE.

Enpuku, K., Sueoka, K., Yoshida, K. & Irie, F., Jan 1 1984, In : Transactions of the Institute of Electronics and Communication Engineers of Japan. Section E. E67, 1, p. 33-39 7 p.

Research output: Contribution to journalArticle

SQUIDs
Magnetic flux
Current voltage characteristics
Inductance
Computer simulation
7 Citations (Scopus)

Steady-State Characteristics of the Push-Pull DC-to-DC Converter

Shoyama, M. & Harada, K., 1984, In : IEEE Transactions on Aerospace and Electronic Systems. AES-20, 1, p. 50-56 7 p.

Research output: Contribution to journalArticle

Inductance
Electric potential
1985
53 Citations (Scopus)

Effect of damping resistance on voltage versus flux relation of a dc SQUID with large inductance and critical current

Enpuku, K., Sueoka, K., Yoshida, K. & Irie, F., Dec 1 1985, In : Journal of Applied Physics. 57, 5, p. 1691-1697 7 p.

Research output: Contribution to journalReview article

inductance
critical current
damping
electric potential
capacitance
8 Citations (Scopus)

Effects of junction geometry on performance of flux-flow type josephson oscillator

Yoshida, K., Nagatsuma, T., Sueoka, K., Enpuku, K. & Irie, F., Jan 1 1985, In : IEEE Transactions on Magnetics. 21, 2, p. 899-902 4 p.

Research output: Contribution to journalArticle

Fluxes
Geometry
Linewidth
Radiation
Computer simulation

EFFECTS OF JUNCTION GEOMETRY ON PERFORMANCE OF FLUX-FLOW TYPE JOSEPHSON OSCILLATOR.

Yoshida, K., Nagatsuma, T., Sueoka, K., Enpuku, K. & Irie, F., Jan 1 1985, In : IEEE Transactions on Magnetics. MAG-21, 2

Research output: Contribution to journalArticle

Fluxes
Geometry
Linewidth
Radiation
Computer simulation
10 Citations (Scopus)

Flux-flow-type josephson linear amplifier with large gain and wide linear range

Nagatsuma, T., Enpuku, K., Iwakura, H. & Yoshida, K., Jan 1 1985, In : Japanese Journal of Applied Physics. 24, 8, p. L599-L601

Research output: Contribution to journalArticle

linear amplifiers
Equivalent circuits
Amplification
Fluxes
Networks (circuits)
81 Citations (Scopus)

Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. III. Oscillation stability

Nagatsuma, T., Enpuku, K., Sueoka, K., Yoshida, K. & Irie, F., Dec 1 1985, In : Journal of Applied Physics. 58, 1, p. 441-449 9 p.

Research output: Contribution to journalArticle

submillimeter waves
millimeter waves
oscillators
oscillations
geometry

IDENTIFICATION OF LOAD CHARACTERISTICS OF POWER SYSTEM USING GMDH.

Sagara, S., Murata, J. & Kishimoto, K., 1985, IFAC Proceedings Series. 7 ed. Pergamon Press, p. 303-308 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

System stability
35 Citations (Scopus)

Noise characteristics of a dc SQUID with a resistively shunted inductance

Enpuku, K., Muta, T., Yoshida, K. & Irie, F., Dec 1 1985, In : Journal of Applied Physics. 58, 5, p. 1916-1923 8 p.

Research output: Contribution to journalArticle

inductance
damping
critical current
degradation
simulation

On the turn-off of GTO by a small saturable core

Harada, K., Sakamoto, H. & Shoyama, M., Jan 1 1985, In : IEEJ Transactions on Electronics, Information and Systems. 105, 11, p. 219-226 8 p.

Research output: Contribution to journalArticle

OUTPUT VOLTAGE RIPPLE IN THE PUSH-PULL DC-TO-DC CONVERTER.

Shoyama, M. & Harada, K., 1985, INTELEC, International Telecommunications Energy Conference (Proceedings). VDE-Verlag GmbH, p. 323-330 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Inductance
Electric potential
1 Citation (Scopus)

PROPERTIES OF POWDER METALLURGY PROCESSED Nb//3Sn SUPERCONDUCTING WIRES.

Yamafuji, K., Iwakuma, M., Sumiyoshi, F., Ogawa, R., Miyatake, T. & Matsumoto, K., Dec 1 1985, Unknown Host Publication Title. Swiss Inst for Nuclear Research, p. 468-471 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Powder metallurgy
Wire
Bronze
Fabrication
Costs
1986
38 Citations (Scopus)

Anomalous magnetic behavior due to reversible fluxoid motion in superconducting multifilamentary wires with very fine filaments

Sumiyoshi, F., Matsuyama, M., Noda, M., Matsushita, T., Funaki, K., Iwakuma, M. & Yamafuji, K., Jan 1 1986, In : Japanese Journal of Applied Physics. 25, 2 A, p. L148-L150

Research output: Contribution to journalArticle

Superconducting wire
Hysteresis
filaments
wire
critical current

Dynamic characteristics of the push‐pull dc‐dc converter

Shoyama, M. & Harada, K., Jan 1 1986, In : Electronics and Communications in Japan (Part II: Electronics). 69, 5, p. 100-109 10 p.

Research output: Contribution to journalArticle

Electric instrument transformers
dynamic characteristics
converters
transformers
Transfer functions
3 Citations (Scopus)

Dynamic Characterstics of the Push-Pull DC to DC Converter

Shoyama, M. & Harada, K., 1986, In : IEEE Transactions on Power Electronics. PE-1, 1, p. 3-8 6 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Effects of tin-diffusion barriers on hysteresis loss and coupling current loss in bronze-processed Nb3Sn multifilamentary composites

Miyahara, K., Sumiyoshi, F., Funaki, K., Iwakuma, M., Kubota, Y., Ogasawara, T. & Yamafuji, K., Jan 1 1986, In : Cryogenics. 26, 4, p. 234-241 8 p.

Research output: Contribution to journalArticle

Diffusion barriers
Tin
Bronze
bronzes
Hysteresis
converters
transistors
saturation
Feedback
Switching frequency
1 Citation (Scopus)

Monthly load forecasting using GMDH

Sagara, S. & Murata, J., Jan 1 1986, In : Electrical Engineering in Japan. 106, 4, p. 125-132 8 p.

Research output: Contribution to journalArticle

Mathematical models

Monthly Load Forecasting Using GMDH.

Sagara, S. & Murata, J., 1986, In : IEEJ Transactions on Electronics, Information and Systems. 106, 5, p. 67-74 8 p.

Research output: Contribution to journalArticle

63 Citations (Scopus)

Noise characteristics of a dc SQUID with a resistively shunted inductance. II. Optimum damping

Enpuku, K., Yoshida, K. & Kohjiro, S., Dec 1 1986, In : Journal of Applied Physics. 60, 12, p. 4218-4223 6 p.

Research output: Contribution to journalArticle

inductance
damping
shunts
tradeoffs
transfer functions
10 Citations (Scopus)

On the High-Speed Turn-Off of a Power Transistor By a Small Saturable Core

Harada, K., Sakamoto, H. & Shoyama, M., Jan 1 1986, In : IEEE Transactions on Power Electronics. PE-1, 3, p. 175-180 6 p.

Research output: Contribution to journalArticle

Switching frequency
Equivalent circuits
Inductance
Deterioration
Capacitance
14 Citations (Scopus)

Resistively shunted dc SQUID coupled to an input coil

Enpuku, K. & Yoshida, K., Dec 1 1986, In : Journal of Applied Physics. 59, 5, p. 1714-1719 6 p.

Research output: Contribution to journalArticle

coils
impedance
damping
inductance
magnetometers
1987

17 TESLA SUPERCONDUCTING MAGNET WITH MULTIFILAMENTARY SUPERCONDUCTORS.

Takeo, M., Funaki, K., Sato, S., Yamafuji, K., Iwakuma, M., Hiramatsu, M., Matsumoto, K. & Hamada, M., Jan 1 1987, In : IEEE Transactions on Magnetics. MAG-23, 2

Research output: Contribution to journalArticle

Superconducting magnets
Superconducting materials
Magnets
Quenching
Magnetic fields
29 Citations (Scopus)

A superconducting sub-structure in sintered ybacu3o7-x plates

Funaki, K., Iwakuma, M., Sudo, Y., Ni, B., Kiss, T., Matsushita, T., Takeo, M. & Yamafuji, K., 1987, In : Japanese Journal of Applied Physics. 26, 9A, p. 1445-1447 3 p.

Research output: Contribution to journalArticle

Magnetization
magnetization
Magnetic fields
magnetic fields
4 Citations (Scopus)

Development of Nb3Sn superconducting wires for AC use

Yamafuji, K., Iwakuma, M., Tomita, Y. & Funaki, K., Jan 1 1987, In : IEEE Transactions on Magnetics. 23, 2, p. 1355-1358 4 p.

Research output: Contribution to journalArticle

Superconducting wire
Wire
Powder metallurgy
Cables
Availability

DEVELOPMENT OF Nb 3 Sn SUPERCONDUCTING WIRES FOR AC USE.

Yamafuji, K., Iwakuma, M., Tomita, Y., Funaki, K., Sumiyoshi, F., Fukutsuka, T., Ogawa, R., Miyatake, T. & Matsumoto, K., Jan 1 1987, In : IEEE Transactions on Magnetics. MAG-23, 2

Research output: Contribution to journalArticle

Superconducting wire
Wire
Powder metallurgy
Cables
3 Citations (Scopus)

Effects of kinetic inductance on the performance of a flux-flow-type josephson amplifier

Hashimoto, T., Enpuku, K., Yoshida, K. & Yamafuji, K., Jan 1 1987, In : Japanese Journal of Applied Physics. 26, 11 A, p. L1874-L1876

Research output: Contribution to journalArticle

inductance
Inductance
amplifiers
Fluxes
Kinetics