PHONON SOFTENING IN (C2H5)4NFEX4 (X=CL, BR)

Authors
PARTITI CSM RECHENBERG HR
Citation
Csm. Partiti et Hr. Rechenberg, PHONON SOFTENING IN (C2H5)4NFEX4 (X=CL, BR), Hyperfine interactions, 83(1-4), 1994, pp. 407-410
Citations number
11
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Physics, Nuclear","Physics, Condensed Matter
Journal title
Hyperfine interactions → ACNP
ISSN journal
03043843
Volume
83
Issue
1-4
Year of publication
1994
Pages
407 - 410
Database
ISI
SICI code
0304-3843(1994)83:1-4<407:PSI((B>2.0.ZU;2-Q
Abstract
Mossbauer spectra of the Fe(III) compounds (C2H5)4NFeX4 (X = Cl, Br) e xhibit the following anomalies above approximately 260 K: (i) the f-fa ctor drops with respect to normal thermal behavior, (ii) the second-or der Doppler shift drops similarly, (iii) the single-line spectrum broa dens, becoming asymmetric at room temperature. These phenomena arc dis cussed in relation to possible phase transitions in these systems.