Nonzero isotope effect in La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/

Journal Article · Mon Aug 24 04:00:00 EDT 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.59.912· OSTI ID:6292322

Batlogg, B; Kourouklis, G; Weber, W; Cava, R J; Jayaraman, A; White, A E; Short, K T; Rupp, L W; Rietman, E A

The effect on the superconducting transition temperature of exchanging /sup 18/O for /sup 16/O in La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ has been studied. The concentration of the two isotopes has been determined by Rutherford backscattering spectroscopy and Raman spectroscopy confirmed the mass-related phonon frequency shift. The /sup 18/O substitution is found to be the same on the two O sites. Magnetic measurements of the transition temperature reveal a nonzero isotope effect (..cap alpha.. = 0.16 +- 0.02). The exponent ..cap alpha.. has also been calculated within a conventional electron-phonon interaction model and was found to be significantly larger.

• Research Organization: ATandT Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 6292322
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 59:8; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EVEN-EVEN NUCLEI
ISOTOPES
ISOTOPIC EXCHANGE
LANTHANUM COMPOUNDS
LIGHT NUCLEI
MAGNETIZATION
NUCLEI
OXYGEN 16
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PHYSICAL PROPERTIES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
STABLE ISOTOPES
STRONTIUM COMPOUNDS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE