Magnetic behavior of Ho/sub 1/Ba/sub 2/(Cu/sub 1-//sub x/Fe/sub x/)/sub 3/O/sub 7-//sub y/

Journal Article · Tue Nov 15 04:00:00 EST 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.342199· OSTI ID:6743799

Violet, C E; Hahn, P A; Datta, T; Almasan, C; Estrada, J

We have carried out dc magnetization (x = 0 and 0.05) and /sup 57/Fe Moessbauer spectroscopy (x = 0.05) measurements of Ho/sub 1/Ba/sub 2/(Cu/sub 1-//sub x/ Fe/sub x/)/sub 3/O/sub 7-//sub y/ , between room temperature (RT) and 4.2 K. Based on x-ray diffraction results all samples are single phase, and either orthorhombic (x = 0) or tegragonal (x = 0.05). Magnetization measurements determined the onset T/sub c/ to be either 90 K (orthorhombic) or 48 K (tetragonal). Moessbauer spectra between RT and 20 K are nearly identical, each consisting of three superposed quadrupole doublets. As the temperature is lowered below about 10 K the Moessbauer spectra exhibit paramagnetic relaxation. The relaxation time increases by about two orders of magnitude as the temperature decreases from 10 to 4.2 K. No magnetic ordering of the Fe moments was observed.

• Research Organization: Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 6743799
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 64:10; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
IRON COMPOUNDS
IRON OXIDES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIZATION
MOESSBAUER EFFECT
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION