Synthesis and superconducting properties of a Rb{sub 3}C{sub 60} single crystal

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.11722· OSTI ID:496742

Chu, S; McHenry, M E ^[1]

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1. Department of Materials Science and Engineering, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

A pristine Rb{sub 3}C{sub 60} single crystal with larger than millimeter dimensions was prepared by reaction of rubidium vapor with a seed-grown C{sub 60} single crystal (which exhibited remarkably sharp x-ray-diffraction peaks). A narrow superconducting transition width {Delta}T{sub c} (5{endash}85{percent} diamagnetic shielding) of the Rb{sub 3}C{sub 60} single crystal is less than 1 K. The onset of the transition was at a temperature, T{sub c}=30.0K. Measurements of temperature dependence of the zero-field-cooled and field-cooled dc magnetization (using ten applied magnetic fields up to 5.0 T) are reported here. These and magnetization vs field data at different temperatures (ranging from 2 to 29 K) have been used to determine thermodynamic superconducting parameters, including the lower [H{sub c1}(T)] and upper [H{sub c2}(T)] critical fields, the Ginsburg-Landau coherence length {xi}, and the London or Ginzburg-Landau penetration depth, {lambda}. These are significantly different from those extracted from similar data in the literature for powder specimens. Hysteresis and magnetic relaxation measurements have been used to determine the nominal critical current density J{sub c}(H,T) and the effective-pinning potential U{sub eff}(J,H), respectively. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 496742
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL PREPARATION
COHERENCE LENGTH
CRITICAL CURRENT
CRITICAL FIELD
FULLERENES
MAGNETIC PROPERTIES
PENETRATION DEPTH
RUBIDIUM COMPOUNDS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TRANSITION TEMPERATURE