Critical scaling of the transport behavior and the magnetic phase diagram of polycrystalline YBa{sub 2}Cu{sub 3}O{sub 7}

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.R747· OSTI ID:165360

Li, S; Fistul, M; Deak, J; Metcalf, P; McElfresh, M ^[1]

---

1. Physics Department, Purdue University, West Lafayette, Indiana 47907 (United States)

A magnetic phase diagram for polycrystalline YBa{sub 2}Cu{sub 3}O{sub 7} was constructed using a combination of results from bulk magnetic and magnetotransport measurements. Electric field as a function of current density {ital E}({ital J}) can be scaled, with the critical coefficients {nu}{approx}1 and {ital z}{approx}4, to identify the temperature of a phase transition into a state characterized by zero linear resistance. The magnetic-field dependence {ital H} of the critical current density {ital J}{sub {ital c}} can be explained based on the penetration of magnetic flux between, and into, the individual grains of the polycrystalline material. The {ital H} dependence of the magnetization suggests that the individual crystallites of the polycrystalline material have low defect densities (clean).

• OSTI ID: 165360
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIZATION
PHASE DIAGRAMS
POLYCRYSTALS
TEMPERATURE RANGE 0065-0273 K
YTTRIUM OXIDES