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Citation 49

Accession Number

003982377

Author

Kheifets AS. Veinger AI.

Institution

A.F. Ioffe Phys. Tech. Inst., Acad. of Sci., Leningrad, USSR.

Title

Absolute measurements of the low magnetic field microwave absorption in
YBa/sub 2/Cu/sub 3/O/sub 7- delta / ceramics.

Source

Physica C, vol.177, no.4-6, 1 July 1991, pp.289-93. Netherlands.

Country of Publication

Netherlands.

Abstract

Absolute measurements of the magnetic-field-dependent nonresonant microwave absorption have been made in polycrystalline YBa/sub 2/Cu/sub 3/O/sub 7- delta / bulk samples. In low magnetic fields of several Oe the surface resistance at 9.4 GHz has the form of R=R/sub 0/+ beta H/sup 2/ where beta =(0.6-2)*10/sup -3/ Omega /Oe/sup 2/ at 4.2 K and (3-8)*10/sup -3/ Omega /Oe/sup 2/ at 77 K. These values agree rather well with calculations within the model of the effective Josephson medium. (22 References).

Abstract Number

A91128877

Subject Headings

Barium compounds
Ceramics
Electromagnetic wave absorption
High-temperature superconductors
Josephson effect
Surface conductivity
Yttrium compounds

Key Phrase Identifiers

high temperature superconductivity; ceramics; magnetic-field-dependent
nonresonant microwave absorption; magnetic fields; surface resistance;
effective Josephson medium; 9.4 GHz; YBa/sub 2/Cu/sub 3/O/sub 7- delta /.

Classification Codes

Superconductor response to electromagnetic fields, nuclear magnetic
resonance, ultrasonic attenuation [A7430G]; Perovskite phase superconductors
[A7470V]; Superconductor tunnelling phenomena, proximity effects, and
Josephson effect [A7450].

Treatment

Experimental.

Chemicals

YBa2Cu3O/ss; Ba2/ss; Cu3/ss; Ba/ss; Cu/ss; O/ss; Y/ss.

Numeric Data

Frequency 9.4E+09 Hz

CODEN

PHYCE6

Language

English.

ISSN

0921-4534.

U.S. Copyright Clearance Center Code

0921-4534/91/$03.50.

Publication Type

Journal Paper.

Update Code

199100.

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