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Featured researches published by Takayuki Simizu.


LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 | 2006

Sound Velocity Measurements near the Superconducting Transition Temperature of κ‐(BEDT‐TTF)2Cu[N(CN)2]Br under the Magnetic Field

Takayuki Simizu; Noriyuki Yoshimoto; Yoshiki Nakanishi

Layered organic superconductor κ‐(BEDT‐TTF)2Cu[N(CN)2]Br shows a step‐like softening in the sound velocity below the superconducting transition temperature. In this study, we have measured the sound velocity in the superconducting state of κ‐(BEDT‐TTF)2Cu[N(CN)2]Br in the applied magnetic field for various directions. The sound velocity as a function of the applied magnetic field shows remarkable elastic anomalies around H = 2 T. It was found that, the magnetic field parallel to the conducting planes of κ‐(BEDT‐TTF)2Cu[N(CN)2]Br, the sound velocity shows a sharp peak, which is considered to be related to the pinning by Josephson vortices.


Physical Review B | 2001

Elastic constants ofPrFe4P12in magnetic fields

Yoshiki Nakanishi; Takayuki Simizu; Tatsuma D. Matsuda; Hitoshi Sugawara; Hideyuki Sato


Archive | 2006

MAGNETIC FLUX MEASURING APPARATUS BY HYSTERESIS CHARACTERISTIC TYPE DIGITAL FLL USING COUNTER SYSTEM FOR SQUID

K. Kobayashi; Daisuke Oyama; Masahito Yoshizawa; Kenji Nakai; Takayuki Simizu; Tomoaki Ueda


Physica B-condensed Matter | 2000

High-frequency ultrasonic measurements of κ-(BEDT-TTF)2Cu(NCS)2 by devised transducer

Takayuki Simizu; Noriyuki Yoshimoto; Mitsuteru Nakamura; M. Yoshizawa


Physical Review B | 2001

Elastic constants of PrFe4P12 in magnetic fields

Yoshiki Nakanishi; Takayuki Simizu; Tatsuma D. Matsuda; Hitoshi Sugawara; Hideyuki Sato


Physica B-condensed Matter | 2006

Vortex dynamics in organic superconductor κ-(ET)2Xκ-(ET)2X(X=Cu(NCS)2(X=Cu(NCS)2, Cu[N(CN)2]Br)Cu[N(CN)2]Br)

Takayuki Simizu; Noriyuki Yoshimoto; Yoshiki Nakanishi; M. Yoshizawa


Electrical Engineering in Japan | 2007

Examination of a digital FLL system design for SQUIDs

D. Oyama; K. Kobayashi; Takayuki Simizu; Y. Uchikawa


The transactions of the Institute of Electrical Engineers of Japan.A | 2006

Examination of a Digital FLL System Design for SQUIDs

Daisuke Oyama; Koichiro Kobayashi; Takayuki Simizu; Y. Uchikawa


Physica B-condensed Matter | 2006

Vortex dynamics in organic superconductor kappa-(ET)X(X=Cu(NCS), Cu[N(CN)]Br)

Takayuki Simizu; Noriyuki Yoshimoto; Yoshiki Nakanishi


Physica B-condensed Matter | 2006

Vortex dynamics in organic superconductor κ-(ET)2X (X = Cu(NCS)2, Cu[N(CN)2]Br)

Takayuki Simizu; Noriyuki Yoshimoto; Yoshiki Nakanishi; M. Yoshizawa

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Daisuke Oyama

Kanazawa Institute of Technology

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Kenji Nakai

Iwate Medical University

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Hideyuki Sato

Tokyo Metropolitan University

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Hitoshi Sugawara

Tokyo Metropolitan University

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