Characteristics of two-stacked intrinsic Josephson junctions with a submicron loop on a Bi2Sr2CaCu2O 8+δ (Bi-2212) single crystal whisker

S. J. Kim, T. Hatano, G. S. Kim, H. Y. Kim, M. Nagao, K. Inomata, K. S. Yun, Y. Takano, S. Arisawa, A. Ishii, S. Takahashi, J. Chen, K. Nakajima, T. Yamashita

研究成果: Article査読

20 被引用数 (Scopus)

抄録

We report on serial dc superconducting quantum interference devices (dc SQUIDs) arrays of two-stacked intrinsic Josephson junctions (IJJs) on a Bi 2Sr2CaCu2O8+δ (Bi-2212) whisker with a submicron hole fabricated by a 3-D focused ion beam (FIB) etching method. The junction area, the number of elementary junctions, and the loop area of the SQUIDs are 3, 20, and 0.42 μm2, respectively. The SQUIDs show typical I-V characteristics of IJJs with a critical current I C of 12 A at 4.2 K. The modulation parameter βL( = 2ICL/Φ0) is 6.4, and the inductance L of the SQUID is 1120 pH. That includes the inductances of the elementary junction around a SQUID loop. In a strong magnetic field, the Fraunhofer pattern is obtained and well fitted to the calculated value from the junction size; ΔB = Φ0/tW; t is the interlayer distance; and W is the junction width. In a low magnetic field, modulation depth of approximately 10% of the I C corresponding to the value of βL is observed. The modulation period of 80 G approximately agrees with the value calculated from the SQUID.

本文言語English
ページ(範囲)1401-1405
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
412-414
SPEC. ISS.
DOI
出版ステータスPublished - 2004 10月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

フィンガープリント

「Characteristics of two-stacked intrinsic Josephson junctions with a submicron loop on a Bi2Sr2CaCu2O 8+δ (Bi-2212) single crystal whisker」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル