Microwave absorption studies on high-T sub c superconductors and related materials II; Electron spin resonance of DPPH coated on Y sub 1 Ba sub 2 Cu sub 3 O sub y as a probe of magnetic field variations

Journal Article · Fri May 10 00:00:00 EDT 1991 · Modern Physics Letters B; (United States)

DOI:https://doi.org/10.1142/S0217984991000964· OSTI ID:5746691

Sugawara, K; Baar, D J; Shiohara, Y; Tanaka, S ^[1]

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1. Superconductivity Research Lab., ISTEC, 10-13 Shinonome, 1-chome, Koto-ku, Tokyo 135 (JP)

This paper reports on the ESR linewidth ({Delta}{ital H}{sub p{bar p}}) of DPPH coated on the surface of powder specimens of Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub y} studied under various magnetic field and temperature conditions. {Delta}{ital H}{sub p{bar p}} increases substantially with decreasing temperature in the field cooled case, whereas almost no linewidth broadening was found in the zero field cooled case. {Delta}{ital H}{sub p{bar p}} was found to be sensitive to the applied magnetic field. This effect was very pronounced at temperatures lower than 40 K, but decreased strongly with increasing temperature. The broadening of the resonance lineshape has been attributed to spatial and temporal variations of the fluxon distribution in the powder particles.

• OSTI ID: 5746691
• Journal Information: Modern Physics Letters B; (United States), Vol. 5:11; ISSN 0217-9849
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
ABSORPTION SPECTRA
YTTRIUM COMPOUNDS
ELECTRON SPIN RESONANCE
BARIUM OXIDES
COPPER OXIDES
MAGNETIC FIELDS
MAGNETIC FLUX
MEASURING METHODS
MICROWAVE RADIATION
POWDERS
SUPERCONDUCTIVITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
MAGNETIC RESONANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
RESONANCE
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
665412* - Superconducting Devices- (1992-)
665411 - Basic Superconductivity Studies- (1992-)
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies