Two-dimensional magnetic order of Er in ErBa sub 2 Cu sub 3 O sub 7

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.346072· OSTI ID:6904945

Lynn, J W; Clinton, T W; Li, W ^[1]; Erwin, R W ^[2]; Liu, J Z ^[3]; Shelton, R N; Klavins, P ^[4]

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1. Center for Superconductivity Research Department of Physics, University of Maryland, College Park, Maryland 20742 (USA) National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (USA)
2. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (USA)
3. Argonne National Laboratory, Argonne, Illinois 60439 (USA)
4. Department of Physics, University of California, Davis, California 95616 (USA)

Neutron diffraction has been used to study the magnetic order of the Er ions in superconducting ErBa{sub 2}Cu{sub 3}O{sub 7}. Above the three-dimensional (3D) Neel temperature ({ital T}{sub {ital N}}=0.618 K) a rod of scattering characteristic of two-dimensional (2D) behavior is unambiguously observed, showing that the magnetic interactions of the rare earth ions are highly anisotropic, while there are no significant correlations observed between the sheets of Er spins. The system orders two dimensionally, and as a necessary consequence 3D order also sets in at the same temperature. The order parameter is found to obey the exact Onsager solution for a {ital S}= (1)/(2) , 2D Ising antiferromagnet. At low {ital T}, two separate types of simple 3D antiferromagnetic structures are found, one characterized by a wave vector of ( (1)/(2) , 0,0), and the other by ( (1)/(2) ,0, (1)/(2) ).

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6904945
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL MODELS
CRYSTALS
DIFFRACTION
ERBIUM COMPOUNDS
ERBIUM IONS
ERBIUM OXIDES
IONS
ISING MODEL
MAGNETIC PROPERTIES
MAGNETISM
MATHEMATICAL MODELS
MONOCRYSTALS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE