Antiferromagnetic order of Cu in Sm sub 2 CuO sub 4

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348206· OSTI ID:5562559

Skanthakumar, S; Lynn, J W ^[1]; Peng, J L; Li, Z Y ^[2]

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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. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742 (USA)

Neutron diffraction techniques have been used to study the magnetic order of the Cu ions in a single crystal of Sm{sub 2}CuO{sub 4}. The measurements revealed the development of long-range magnetic order of the Cu moments at {ital T}{sub {ital N}} = 280 {plus minus} 1 K, with a relatively simple antiferromagnetic configuration of spins as found in Nd{sub 2}CuO{sub 4} and Pr{sub 2}CuO{sub 4}. However, the spin directions in Sm{sub 2}CuO{sub 4} are rotated by 90{degree} from the spin directions in Nd{sub 2}CuO{sub 4} and Pr{sub 2}CuO{sub 4}. The detailed spin structure can be either collinear or noncollinear, and in these tetragonal systems it is not possible to distinguish between them with the present neutron diffraction data on multidomain samples. Our measurements demonstrate that there are no spin reorientations below the Neel temperature, in contrast to the behavior found for Nd{sub 2}CuO{sub 4}.

• OSTI ID: 5562559
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETISM
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER IONS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
IONS
MAGNETIC MOMENTS
MAGNETISM
MEDIUM TEMPERATURE
MONOCRYSTALS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
SAMARIUM OXIDES
SCATTERING
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS