Critical fluctuations in the magnetization of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8] near the [ital H][sub [ital c]2]([ital T]) line

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.9877· OSTI ID:6108574

Li, Q ^[1]; Shibutani, K ^[2]; Suenaga, M ^[1]; Shigaki, I; Ogawa, R ^[3]

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1. Division of Materials Sciences, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Division of Materials Sciences, Brookhaven National Laboratory, Upton, New York 11973 (United States) Superconducting Cryogenic Technology Center, Kobe Steel, LTD., Takatsukadai 1-Chome, Nishi-ku, Kobe 651-22 (Japan)
3. Superconducting Cryogenic Technology Center, Kobe Steel, LTD., Takatsukadai 1-Chome, Nishi-ku, Kobe 651-22 (Japan)

The magnetization measurements on Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8] single crystals with [ital H] parallel to the [ital c] axis are presented to show that the critical fluctuations in the magnetization near the [ital H][sub [ital c]2]([ital T]) line can be well studied within the two-dimensional nonperturbative scaling theory developed by Te[hacek s]anovic [ital et] [ital al]. By using this scaling theory and basic thermodynamic arguments, we obtained the Ginzburg-Landau parameter [kappa] ([congruent]115) and [ital dH][sub [ital c]2]/[ital dT] ([congruent][minus]2.7 T/K) near [ital T][sub [ital c]] for this material. In addition, we found that these derived parameters are in good agreement with those determined from the study of reversible magnetization in an intermediate field at low temperature.

• OSTI ID: 6108574
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:13; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRITICAL FIELD
CRYSTALS
FLUCTUATIONS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIZATION
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
SCALING LAWS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
VARIATIONS