Microwave properties of YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] films at 35 GHz from magnetotransmission and magnetoreflection measurements

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.4199· OSTI ID:5254207

Moser, E K; Tomasch, W J; McClorey, M J; Furdyna, J K ^[1]; Coffey, M W ^[2]; Pettiette-Hall, C L; Schwarzbek, S M ^[3]

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1. Physics Department, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
2. National Institute of Standards and Technology, Boulder, Colorado 80303 (United States)
3. TRW Space and Technology, Redondo Beach, California 90278 (United States)

Microwave transmission and reflection measurements are performed simultaneously on thin films ([similar to]1800 A) of YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] having their [ital c] axis perpendicular to the LaAlO[sub 3] substrate. We determine power transmission and reflection fractions, [ital scrT]([ital T],[ital H]) and [ital scrR]([ital T],[ital H]), as functions of temperature and static magnetic field (0[lt][ital H][lt]5.4 T), the latter being applied perpendicular to the film. A guided-wave model, which we develop for our experimental situation, is the basis of a computational algorithm that extracts quantitative values of the complex penetration depth [tilde [lambda]], or alternatively the complex surface impedance [ital Z][sub [ital s]], from [ital scrT] and [ital scrR] data. This inversion algorithm is successful when applied to test data generated from a phenomenological theory describing the electrodynamic response of a type-II superconductor. The procedure is applied to [ital scrT]([ital T],[ital H]) and [ital scrR]([ital T],[ital H]) measurements to infer the temperature- and field-dependent complex penetration depth [tilde [lambda]]([ital T],[ital H]) that completely characterizes the superconductive film's electromagnetic response.

• DOE Contract Number: FG02-90ER45427
• OSTI ID: 5254207
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:6; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTROMAGNETIC RADIATION
FILMS
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
MAGNETIC FIELDS
MICROWAVE RADIATION
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
REFLECTION
SUPERCONDUCTING FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES