Derivation of Inter-Atomic Force Constants of Cu2O from Diffuse Neutron Scattering Measurement

T. Makhsun (Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency, Jakarta 12070, Indonesia)
T. Sakuma (Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan)
E. Kartini (Center for Technology of Nuclear Industrial Materials, National Nuclear Energy Agency, Puspiptek Serpong 15314 Indonesia)
R. Sakai (Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan)
H. Takahashi (Institute of Applied Beam Science, Ibaraki University, Hitachi 316-8511, Japan)
N. Igawa (Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai 319-1195, Japan)
S.A. Danilkin (Bragg Institute, Australian Nuclear Science and Technology Organization, Kirrawee)

Atom Indonesia Journal
Vol 39, No 1 (2013): April 2013

Neutron scattering intensity from Cu2O compound has been measured at 10 K and 295 K with High Resolution Powder Diffractometer at JRR-3 JAEA. The oscillatory diffuse scattering related to correlations among thermal displacements of atoms was observed at 295 K. The correlation parameters were determined from the observed diffuse scattering intensity at 10 and 295 K. The force constants between the neighboring atoms in Cu2O were estimated from the correlation parameters and compared to those of Ag2O.Received: 16 January 2013; Revised: 10 April 2013; Accepted: 15 April 2013