Please use this identifier to cite or link to this item:
Authors: Osten, Felix L.
Panthöfer, Martin
Ksenofontov, Vadim
Möller, Angela
Title: Site-preferences in the mixed-valent series FeMo1−nVnO4 : controlling the formation of the α-polymorph and the charge localization
Online publication date: 30-Jan-2023
Year of first publication: 2022
Language: english
Abstract: The mixed-valent, solid solution series FeMo1−nVnO4 (0≤n≤0.3) was synthesized and characterized by x-ray diffraction, and thermal analysis. Assignments of individual Fe-species stem from 57Fe-Mössbauer spectroscopy and DFT-calculations of the electric field gradients. The incorporation of smaller ions (FeIII, VV) represents an internal “chemical pressure” effect stabilizing the low-temperature α-polymorph with increasing n. The site-preference and distribution of vanadium on individual Mo-sites impacts the α→β transition temperatures around 650 K, and causes distinct differences in charge mobility in this hole-doped semiconductor around 225 K. We assign the charge localization in α-FeMo1−nVnO4 to enhanced electron-phonon coupling within a polaronic scenario.
DDC: 540 Chemie
540 Chemistry and allied sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
License: CC BY-NC-ND
Information on rights of use:
Journal: Zeitschrift für anorganische und allgemeine Chemie
Pages or article number: e202200281
Publisher: Wiley
Issue date: 2022
ISSN: 1521-3749
Publisher DOI: 10.1002/zaac.202200281
Appears in collections:DFG-491381577-H

Files in This Item:
  File Description SizeFormat
sitepreferences_in_the_mixedv-20230127150352732.pdf2.89 MBAdobe PDFView/Open