DC and AC Responses of Josephson Vortex Flow Transistors with High <I>T<SUB>c</SUB></I> Superconducting Thin Films

Yasushi DODA; Iwao KAWAYAMA; Hironaru MURAKAMI; Masayoshi TONOUCHI

doi:10.1093/ietele/e89-c.2.177

DC and AC Responses of Josephson Vortex Flow Transistors with High T_c Superconducting Thin Films

Yasushi DODA, Iwao KAWAYAMA, Hironaru MURAKAMI, Masayoshi TONOUCHI

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We fabricated Josephson vortex flow transistors (JVFTs) with a parallel array of Josephson junctions that were prepared using c-axis-oriented 100-nm-thick YBa₂Cu₃O_7-δ (YBCO) thin films grown on 24bicrystal MgO (100) substrates. We observed clear modulations of the critical current and the flow voltage with DC current input to the control line that was inductively coupled to the array of junctions. From the results, we estimated the parameters of the device, e.g., the mutual inductance and the self-inductance, and calculated the operation frequency at which the device potentially exhibited these parameters. Moreover, the current gain and the transresistance were evaluated and found to be 0.5 and 0.15 Ω, respectively. In addition, we observed the high-frequency responses of the JVFT to the input AC current of the sine wave or the square pulse wave. A clear oscillation of the output voltage could be observed with a 1 MHz sine wave and 250 kHz square pulse wave. We also discussed the feasibility of higher frequency operation by using it as an input interface for a single flux quantum (SFQ) logic circuit.

Publication: IEICE TRANSACTIONS on Electronics Vol.E89-C No.2 pp.177-181

Publication Date: 2006/02/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e89-c.2.177

Type of Manuscript: Special Section PAPER (Special Section on Superconducting High-frequency Devices)

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Yasushi DODA, Iwao KAWAYAMA, Hironaru MURAKAMI, Masayoshi TONOUCHI, "DC and AC Responses of Josephson Vortex Flow Transistors with High Tc Superconducting Thin Films" in IEICE TRANSACTIONS on Electronics, vol. E89-C, no. 2, pp. 177-181, February 2006, doi: 10.1093/ietele/e89-c.2.177.
Abstract: We fabricated Josephson vortex flow transistors (JVFTs) with a parallel array of Josephson junctions that were prepared using c-axis-oriented 100-nm-thick YBa₂Cu₃O_7-δ (YBCO) thin films grown on 24bicrystal MgO (100) substrates. We observed clear modulations of the critical current and the flow voltage with DC current input to the control line that was inductively coupled to the array of junctions. From the results, we estimated the parameters of the device, e.g., the mutual inductance and the self-inductance, and calculated the operation frequency at which the device potentially exhibited these parameters. Moreover, the current gain and the transresistance were evaluated and found to be 0.5 and 0.15 Ω, respectively. In addition, we observed the high-frequency responses of the JVFT to the input AC current of the sine wave or the square pulse wave. A clear oscillation of the output voltage could be observed with a 1 MHz sine wave and 250 kHz square pulse wave. We also discussed the feasibility of higher frequency operation by using it as an input interface for a single flux quantum (SFQ) logic circuit.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e89-c.2.177/_p

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@ARTICLE{e89-c_2_177,
author={Yasushi DODA, Iwao KAWAYAMA, Hironaru MURAKAMI, Masayoshi TONOUCHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={DC and AC Responses of Josephson Vortex Flow Transistors with High Tc Superconducting Thin Films},
year={2006},
volume={E89-C},
number={2},
pages={177-181},
abstract={We fabricated Josephson vortex flow transistors (JVFTs) with a parallel array of Josephson junctions that were prepared using c-axis-oriented 100-nm-thick YBa₂Cu₃O_7-δ (YBCO) thin films grown on 24bicrystal MgO (100) substrates. We observed clear modulations of the critical current and the flow voltage with DC current input to the control line that was inductively coupled to the array of junctions. From the results, we estimated the parameters of the device, e.g., the mutual inductance and the self-inductance, and calculated the operation frequency at which the device potentially exhibited these parameters. Moreover, the current gain and the transresistance were evaluated and found to be 0.5 and 0.15 Ω, respectively. In addition, we observed the high-frequency responses of the JVFT to the input AC current of the sine wave or the square pulse wave. A clear oscillation of the output voltage could be observed with a 1 MHz sine wave and 250 kHz square pulse wave. We also discussed the feasibility of higher frequency operation by using it as an input interface for a single flux quantum (SFQ) logic circuit.},
keywords={},
doi={10.1093/ietele/e89-c.2.177},
ISSN={1745-1353},
month={February},}

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TY - JOUR
TI - DC and AC Responses of Josephson Vortex Flow Transistors with High Tc Superconducting Thin Films
T2 - IEICE TRANSACTIONS on Electronics
SP - 177
EP - 181
AU - Yasushi DODA
AU - Iwao KAWAYAMA
AU - Hironaru MURAKAMI
AU - Masayoshi TONOUCHI
PY - 2006
DO - 10.1093/ietele/e89-c.2.177
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E89-C
IS - 2
JA - IEICE TRANSACTIONS on Electronics
Y1 - February 2006
AB - We fabricated Josephson vortex flow transistors (JVFTs) with a parallel array of Josephson junctions that were prepared using c-axis-oriented 100-nm-thick YBa₂Cu₃O_7-δ (YBCO) thin films grown on 24bicrystal MgO (100) substrates. We observed clear modulations of the critical current and the flow voltage with DC current input to the control line that was inductively coupled to the array of junctions. From the results, we estimated the parameters of the device, e.g., the mutual inductance and the self-inductance, and calculated the operation frequency at which the device potentially exhibited these parameters. Moreover, the current gain and the transresistance were evaluated and found to be 0.5 and 0.15 Ω, respectively. In addition, we observed the high-frequency responses of the JVFT to the input AC current of the sine wave or the square pulse wave. A clear oscillation of the output voltage could be observed with a 1 MHz sine wave and 250 kHz square pulse wave. We also discussed the feasibility of higher frequency operation by using it as an input interface for a single flux quantum (SFQ) logic circuit.
ER -