Antiferromagnetic form factor of Sr sub 2 CuO sub 2 Cl sub 2

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

DOI:https://doi.org/10.1063/1.344857· OSTI ID:6948123

Wang, X L; Miller, L L; Ye, J; Stassis, C; Harmon, B N; Johnston, D C ^[1]; Schultz, A J; Loong, C ^[2]

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1. Ames Laboratory, Ames, IA (USA) Physics Department, Iowa State University Ames, Iowa 50011 (USA)
2. Argonne National Laboratory, Argonne, Illinois 60439 (USA)

Neutron diffraction techniques have been used to study the antiferromagnetic form factor of Sr{sub 2}CuO{sub 2}Cl{sub 2}, which has the body-centered-tetragonal ({ital I}4/{ital mmm}) K{sub 2}NiF{sub 4}-type structure (the same as that of tetragonal La{sub 2}CuO{sub 4} but with the out-of-plane oxygens replaced by Cl and the La by Sr). The antiferromagnetic form factor was obtained at 15 K by measuring the integrated intensities of the ( (1)/(2) (1)/(2) 0), ( (1)/(2) (1)/(2) 2), ( (1)/(2) (1)/(2) 3), ( (3)/(2) (3)/(2) 0), ( (3)/(2) (3)/(2) 6), ( (3)/(2) (5)/(2) 1), ( (3)/(2) (3)/(2) 8), and ( (5)/(2) (5)/(2) 0) magnetic reflections of a single crystal of Sr{sub 2}CuO{sub 2}Cl{sub 2}. The experimentally determined magnetic form factor is similar to that of La{sub 2}CuO{sub 4}. The experimental data were compared with the Cu{sup 2+} magnetic form factor and with the results of band theoretical calculations. We find that the fit to the experimental data is improved if one assumes a dipolar spin polarization on the in-plane oxygen ions.

• OSTI ID: 6948123
• 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
ANTIFERROMAGNETISM
BAND THEORY
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
COPPER CHLORIDES
COPPER COMPOUNDS
COPPER HALIDES
COPPER OXIDES
CRYSTALS
DIFFRACTION
FORM FACTORS
HALIDES
HALOGEN COMPOUNDS
MAGNETISM
MONOCRYSTALS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
SCATTERING
STRONTIUM CHLORIDES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TIME-OF-FLIGHT METHOD
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE