Presentation 1998/7/28
High Performance SQUID Magnetometer Utilizing Bicrystal Junctions with 30 Degree Misorientation Angles
Keiji Enpuku, Tadashi Minotani, Fumio Shiraishi, Atsushi Kandori,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) High performance SQUID magnetometer operating at T=77 K is fabricated by utilizing bicrystal junctions with 30 degrees misorientation angles.With this technology, Josephson junctions with critical current I_o=10~20 μA and resistance R_s≈10 Ω can be obtained rether reproducibly. As a result, performances of the SQUID, such as voltage modulation depth and the flux noise, are greatly improved. Moreover, the 1/f noise component of the flux noise can be much decreased with the so-called ac-bias method. The directly coupled magnetometer is also fabricated on 1cm x 1cm substrate, whose field noise is B_n=20~30fT/Hz^<1/2> for f>5 Hz and B_n<70 fT/Hz<1/2> at f=1 Hz.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) High T_c SQUID / 30-degree bicrystal junction / flux noise / magnetometer
Paper # SCE98-12
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Conference Information
Committee SCE
Conference Date 1998/7/28(1days)
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Registration To Superconductive Electronics (SCE)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) High Performance SQUID Magnetometer Utilizing Bicrystal Junctions with 30 Degree Misorientation Angles
Sub Title (in English)
Keyword(1) High T_c SQUID
Keyword(2) 30-degree bicrystal junction
Keyword(3) flux noise
Keyword(4) magnetometer
1st Author's Name Keiji Enpuku
1st Author's Affiliation Department of Electronic Device Engineering, ISEE, Kyusyu University()
2nd Author's Name Tadashi Minotani
2nd Author's Affiliation Department of Electronic Device Engineering, ISEE, Kyusyu University
3rd Author's Name Fumio Shiraishi
3rd Author's Affiliation Department of Electronic Device Engineering, ISEE, Kyusyu University
4th Author's Name Atsushi Kandori
4th Author's Affiliation Department of Electronic Device Engineering, ISEE, Kyusyu University
Date 1998/7/28
Paper # SCE98-12
Volume (vol) vol.98
Number (no) 222
Page pp.pp.-
#Pages 6
Date of Issue