Lattice dynamics in perovskite-type layer structures. I. FIR and Raman studies on K2MnF4and Rb2MnCl4
- 14 December 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (23), 4213-4223
- https://doi.org/10.1088/0022-3719/9/23/006
Abstract
The far-infrared reflectivity of K2MnF4 and Rb2MnCl4 single crystal was studied for E perpendicular to c and E approximately=c at several temperatures. By means of a Kramers-Kronig analysis, the frequencies of the long-wavelength infrared-active phonons were determined. In addition, Raman spectra of Rb2MnCl4 were measured. Two peaks were found in both of the x(zz)y and x(zy)z spectra. From these maxima the frequencies were deduced for phonons with the Gamma 1+(A1g) and Gamma 5+(Eg) symmetries, respectively. The frequency dependence in K2MnF4 and Rb2MnCl4 was studied between 13K and room temperature. This investigation was performed with the intention of obtaining a complete set of experimental data for lattice dynamical considerations especially with respect to the intralayer and interlayer forces in K2MnF4 and Rb2MnCl4.Keywords
This publication has 16 references indexed in Scilit:
- On the importance of hydrogen bonding for the structural phase transitions in (CH3NH3)2MnCl4. A single-crystal neutron diffraction studyPhysica Status Solidi (a), 1976
- On the second-order phase transition in (CH3NH3)2MnCl4. A single-crystal neutron diffraction study at 404 and 293 KPhysica Status Solidi (a), 1975
- X-Ray study of the structural first-order phase transition (Cmca-P42/ncm) in (CH3NH3)2CdCl4Physica Status Solidi (a), 1975
- The Crystal Structure of KMnF3at 50 KJournal of the Physics Society Japan, 1975
- Magneto‐optical investigations of the two‐dimensional ferromagnet (CH3NH3)2CuCl4Physica Status Solidi (b), 1975
- Growth of large K2MnF4 single crystals and characterization by X-ray and neutron diffraction investigationsJournal of Crystal Growth, 1974
- Experiments on simple magnetic model systemsAdvances in Physics, 1974
- Investigations of a quasi two-dimensional Heisenberg antiferromagnetic system. Nondeuterated and deuterated alkyl-ammonium-tetrachloromanganateSolid State Communications, 1973
- Infrared Dielectric Dispersion of Several Fluoride PerovskitesPhysical Review B, 1967
- Dielectric constants and lattice vibrationsJournal of Physics and Chemistry of Solids, 1962