The antiferromagnetic form factor of La sub 2 NiO sub 4

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

DOI:https://doi.org/10.1063/1.348204· OSTI ID:5562563

Wang, X L; Stassis, C; Johnston, D C; Leung, T C; Ye, J; Harmon, B N ^[1]; Lander, G H ^[2]; Schultz, A J; Loong, C ^[3]; Honig, J M ^[4]

---

1. Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa 50011 (USA)
2. Commission of European Communities, Karlsruhe, Federal Republic of (Germany)
3. Argonne National Laboratory, Argonne, Illinois 60439 (USA)
4. Department of Chemistry, Purdue University, West Lafayette, Indiana 47907 (USA)

Neutron-diffraction techniques have been used to study the antiferromagnetic form factor of a La{sub 2}NiO{sub 4} single crystal at 15 K. The antiferromagnetic form factor was obtained by measuring the integrated intensities of 16 magnetic reflections. A plateau is clearly seen at low {ital Q} (up to 3 A{sup {minus}1}) in the experimentally determined form factor, similar to those observed for La{sub 2}CuO{sub 4} and Sr{sub 2}CuO{sub 2}Cl{sub 2}. As in the case of these latter compounds, the fit of the experimental data by a Ni{sup 2+} ionic form factor is not satisfactory. The experimental data are compared with a recent spin-polarized band calculation and with a covalency model.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5562563
• 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
BAND THEORY
CHALCOGENIDES
COHERENT SCATTERING
COVALENCE
CRYSTALS
DIFFRACTION
FORM FACTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETISM
MONOCRYSTALS
NEUTRON DIFFRACTION
NICKEL COMPOUNDS
NICKEL OXIDES
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SPIN ORIENTATION
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE