Superconductivity and paramagnetism in ErBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub y/

Journal Article · Mon Jul 25 04:00:00 EDT 1988 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.100600· OSTI ID:7161142

Xu, Y; Guan, W

We report detailed magnetic susceptibility and magnetization studies for the high T/sub c/ oxide superconductor ErBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub y/. The magnetic susceptibility chi of ErBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub y/ follows a Curie--Weiss law both above and below T/sub c/ with the magnetic moment P/sub eff/ = 9.2..mu../sub B/, which is close to that of 9.58..mu../sub B/ deduced from the ground state of Er/sup 3 +/ ion. Magnetization data at various temperatures have revealed a very large magnetic hysteresis. By analyzing the hysteretic magnetization data, we obtain the critical current density J/sub c/(H) and the reversible magnetization M/sub e/(H) at 4.2 K. The saturation of M/sub e/ in high fields at low temperature can be explained by the standard theory of paramagnetism with a Brillouin function. We find that superconductivity and paramagnetism in ErBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub y/ exist largely independently of one another.

• Research Organization: Institut fuer Angewandte Physik, Universitaet Giessen, D-6300 Giessen, Federal Republic of Germany
• OSTI ID: 7161142
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 53:4; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CURIE POINT
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ERBIUM COMPOUNDS
ERBIUM OXIDES
EXPERIMENTAL DATA
INFORMATION
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MAGNETIZATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARAMAGNETISM
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE