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Titolo:
Effects of flux dam on low-frequency noise in high-T-c SQUID magnetometers
Autore:
Oyama, H; Kuriki, S; Matsuda, M;
Indirizzi:
Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0600812, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600812 oro, Hokkaido 0600812, Japan Muroran Inst Technol, Muroran, Hokkaido 0508585, Japan Muroran Inst Technol Muroran Hokkaido Japan 0508585 kkaido 0508585, Japan
Titolo Testata:
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
fascicolo: 1, volume: 11, anno: 2001,
parte:, 1
pagine: 1331 - 1334
SICI:
1051-8223(200103)11:1<1331:EOFDOL>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTUM INTERFERENCE DEVICES; MAGNETIC-FIELD; 1/F NOISE; REDUCTION; AC;
Keywords:
flux dam; magnetic field noise; mesh structure; SQUID magnetometer; vortex motion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Oyama, H Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0600812, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600812 aido 0600812, Japan
Citazione:
H. Oyama et al., "Effects of flux dam on low-frequency noise in high-T-c SQUID magnetometers", IEEE APPL S, 11(1), 2001, pp. 1331-1334

Abstract

We demonstrated that the low-frequency noise in a high-T-c superconductingquantum interference device (SQUID) magnetometer when an external magneticfield is changed could be reduced by forming slots in a flux dam. We designed and fabricated directly coupled de SQUID magnetometers having a mesh structure and flux dams, In order to suppress the vortex motion in the flux dams, we formed 5-mum-wide strip lines and slots across the grain boundary of the flux dams, The output of the magnetometer in a flux-locked loop (FLL)operation became stable and low-frequency noise was suppressed up to an applied field of 83 muT in field cooling and 40 muT for field change after zero field cooling. The importance of the structure of the flux dam in controlling the vortex motion is discussed.

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Documento generato il 07/04/20 alle ore 22:58:28