Superconductivity under high pressure of YBa sub 2 (Cu sub 1 minus x M x ) sub 3 O sub 7 minus. delta. ( M =Fe, Co, Al, Cr, Ni, and Zn)

Journal Article · Tue May 01 00:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.8757· OSTI ID:6883935

Huber, J G; Liverman, W J ^[1]; Xu, Y; Moodenbaugh, A R ^[2]

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1. Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284 (USA)
2. Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973 (USA)

A survey of the superconducting transition temperature {ital T}{sub {ital c}} of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (1:2:3) and related superconductors as a function of pressure {ital p}({le}17 kbar) was made. Well-characterized samples, among them fully oxidized and oxygen-reduced 1:2:3 and Cu-substituted YBa{sub 2}(Cu{sub 1{minus}{ital x}M{ital x}}){sub 3}O{sub 7{minus}{delta}} ({ital M}=Fe, Co, Al, Cr, Ni, and Zn), were prepared according to published methods. Small pieces ({similar to}100 mg) of the samples were measured for superconductivity using an ac mutual inductance method. For YBa{sub 2}Cu{sub 3}O{sub 7} little pressure dependence is observed ({ital dT}{sub {ital c}}/{ital dp}={minus}0.01{plus minus}0.02 K/kbar), in agreement with most previous work. However, with substitutions {ital M}=Fe, Co, or Al, a significant positive pressure dependence of {ital T}{sub {ital c}} is observed, increasing with increasing {ital M} content. For {ital M}=Zn and Ni there is little pressure dependence of {ital T}{sub {ital c}}. For an oxygen-reduced sample ({delta}=0.2){ital T}{sub {ital c}} increases with pressure.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6883935
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 41:13; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
TRANSITION TEMPERATURE
COPPER OXIDES
YTTRIUM OXIDES
IMPURITIES
PRESSURE EFFECTS
SUPERCONDUCTIVITY
TRANSITION ELEMENTS
VERY HIGH PRESSURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties