Magnetic defects in La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub delta/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We report the magnetization as a function of magnetic field and temperature for as-grown and doped La/sub 2/CuO/sub 4/. Two samples of La/sub 2/CuO/sub 4/ with differing oxygen treatment and a sample of La/sub 1.995/Sr/sub 0.005/CuO/sub 4/ exhibited T/sub N/ of 225, 240, and 215 K, respectively. An anomalous magnetic field dependence of the magnetization was observed above and below T/sub N/ for each of these samples, suggestive of the presence of small ferromagnetically coupled domains present within each of these samples. Below T/sub N/ these ferromagnetic regions appear antiferromagnetic until application of a critical field switches them to a ferromagnetic domain. Samples of La/sub 2-//sub x/Sr/sub x/CuO/sub 4/ with x = 0.05 and 0.15 show no antiferromagnetic ordering and no anomalous ferromagnetic domains. These anomalous magnetic effects give credence to models of formation of unusual magnetic domains within these antiferromagnetically coupled materials.
- Research Organization:
- Department of Physics, The Ohio State University, Columbus, Ohio 43210-1106
- OSTI ID:
- 7004803
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DOMAIN STRUCTURE
DOPED MATERIALS
FERROMAGNETISM
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETISM
MAGNETIZATION
MATERIALS
NEEL TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DOMAIN STRUCTURE
DOPED MATERIALS
FERROMAGNETISM
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETISM
MAGNETIZATION
MATERIALS
NEEL TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE