Noise probes of underlying static correlation lengths in the superconducting peak effect

Journal Article · Thu Jan 01 00:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.R720· OSTI ID:573829

Rabin, M W; Merithew, R D; Weissman, M B ^[1]; Higgins, M J; Bhattacharya, S ^[2]

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1. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080 (United States)
2. NEC Research Institute, Princeton, New Jersey 08540 (United States)

The sensitivity of low-frequency noise to ac magnetic-field perturbations is explored in the plastic flow regime near the {open_quotes}peak effect{close_quotes} in the clean type-II superconductor NbSe{sub 2}. Very small ac magnetic fields (on the order of 1 Oe in a dc field of about 20000 Oe) substantially reduce the low-frequency spectral density by inducing rapid switching among metastable configurations present in the pinned state. This sensitivity to ac fields shrinks rapidly as H increases in the peak-effect regime, indicating reduced static correlation lengths as the peak is approached. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 573829
• Journal Information: Physical Review, B: Condensed Matter, Vol. 57, Issue 2; Other Information: PBD: Jan 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNETIC FLUX
NOISE
MAGNETIC FIELDS
NIOBIUM SELENIDES
TYPE-II SUPERCONDUCTORS
SELENIUM COMPOUNDS
CRITICAL CURRENT
SUPERCONDUCTIVITY
CORRELATIONS