Abstract
We have designed and fabricated a very low noise integrated dc Superconducting QUantum Interference Device (SQUID) magnetometer on a 4×4 mm2 chip. The white flux noise at 1 kHz is \(6 \times {10^{ - 7}}{\Phi _0}/\sqrt {Hz} \). This corresponds to a flux density noise of \(3.4\;fT/\sqrt {Hz} \) and a coupled energy resolution of 32 h. The 1/f noise corner frequency is 10 Hz and the 1/f flux noise at 1 Hz is \(2 \times {10^{ - 6}}{\Phi _0}/\sqrt {Hz} \).
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References
M.B. Ketchen and R.F. Voss, Appl. Phys. Lett. 35, 812 (1979).
M.W. Cromar and P. Carelli, Appl. Phys. Lett. 38, 723 (1981).
J.M. Jaycox and M.B. Ketchen, IEEE Trans. Magn. MAG-17, 400 (1981).
M.B. Ketchen and J.M. Jaycox, Appl. Phys. Lett. 40, 736 (1982).
R. Cantor, T. Ryhanen, D. Drung, H. Koch, and H. Seppa, IEEE Trans. Magn. MAG-27, 2927 (1991).
H. Seppa and T. Ryhanen, IEEE Trans. Magn. MAG-23, 1083 (1987).
D. Drung and W. Jutzi, in: SQUID’85, Superconducting Quantum Interference Devices and Their Applications, eds. H.D. Hahlbohm and H. Lubbig (Walter de Gruyter, Berlin, 1985 ), p. 807.
J. Knuutila, M. Kajola, H. Seppa, R. Mutikainen, and J. Salmi, J. Low Temp. Phys. 81, 369 (1988).
J.A. Ketoja, J. Kurkijarvi, and R.K. Ritala, Phys. Rev. B30, 3757 (1984).
T. Ryhanen, R. Cantor, D. Drung, H. Koch, and H. Seppa, IEEE Trans. Magn. MAG-27, (1991).
C. Hilbert and J. Clarke, J. Low Temp. Phys. 61, 237 (1985).
B. Muhlfelder, J.A. Beall, M.W. Cromar, R.H. Ono, and W.W. Johnson, IEEE Trans. Magn. MAG-21, 427 (1985).
T. Ryhanen, H. Seppa, R. Ilmoniemi, and J. Knuutila, J. Low Temp. Phys. 76, 287 (1989).
R. Cantor, D. Drung, M. Peters, and H. Koch, J. Appl. Phys. 67, 3038 (1990).
T. Ryhanen, R. Cantor, D. Drung, and H. Koch, Appl. Phys. Lett. 59, 228 (1991).
D. Drung, R. Cantor, M. Peters, H.J. Scheer, and H. Koch, Appl. Phys. Lett. 57, 406 (1990).
H. Seppa, to appear in Rev. Sci. Instrum.
T. Ryhanen, H. Seppa, R. Cantor, D. Drung, and H. Koch, these proceedings.
The calculation of the intrinsic flux noise in ref. 5 did not take the small dynamic resistance of the SQUID into account, which leads to an under-determination of the noise. The corrected white flux noise at 1 kHz for the magnetometer in ref. 5 is 6.7 x 10-7φ0/.
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© 1992 Springer-Verlag Berlin Heidelberg
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Cantor, R., Ryhänen, T., Seppä, H. (1992). A Compact Very Low Noise DC-SQUID Magnetometer. In: Koch, H., Lübbig, H. (eds) Superconducting Devices and Their Applications. Springer Proceedings in Physics, vol 64. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77457-7_49
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DOI: https://doi.org/10.1007/978-3-642-77457-7_49
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