Comprehensive characterization and structural modelling of lithium ferrites
The character and magnitude of the properties of lithium ferrites depend on the specific polymorph stabilized. Reliable polymorph identification and quantitative analysis have been realized by complementary structural characterization techniques (synchrotron X-ray diffraction, 57 Fe Mössbauer and X-ray absorption spectroscopies), through fitting/modelling of the experimental datasets to appropriate mathematical models. Calculated sample compositions show a maximum offset of 7 wt% between techniques, and cation distribution on the spinel-like LiFe 5 O 8 material has yielded values ranging from 60 to 67 at% Fe 3+ in octahedral sites with respect to the total number of Fe 3+ cations in the spinel phase. Magnetic transition temperatures (i.e., Néel/Curie) in the order of 91–93 K and 893–898 K have been measured for LiFeO 2 and LiFe 5 O 8 , respectively. The combined characterization presented here is brought forward as a reliable method to establish the relative concentrations of polymorphs in ferrites, a strategy which can be expanded to other families of Fe-based materials.
Authors
- J.F. Marco
- Juan Rubio‐Zuazo (ORCID: https://orcid.org/0000-0003-0614-5334)
- Adrián Quesada (ORCID: https://orcid.org/0000-0002-6994-0514)
- E. Navarro (ORCID: https://orcid.org/0000-0002-2807-3805)
- Pilar Marín (ORCID: https://orcid.org/0000-0003-1068-6934)
- Jesús López‐Sánchez (ORCID: https://orcid.org/0000-0002-2670-9347)
- Aída Serrano (ORCID: https://orcid.org/0000-0002-6162-0014)
- J.F. Fernández (ORCID: https://orcid.org/0000-0001-5894-9866)
- Giulio Gorni
- Cecilia Granados‐Miralles (ORCID: https://orcid.org/0000-0002-3679-387X)
- Alberto Castellano-Soria (ORCID: https://orcid.org/0000-0002-9342-3453)
Institutions
- Universidad Complutense de Madrid (ES)
- Consejo Superior de Investigaciones Científicas (ES)
- ALBA Synchrotron (Spain) (ES)
- European Synchrotron Radiation Facility (FR)
- Instituto de Cerámica y Vidrio (ES)
- Instituto de Ciencia de Materiales de Madrid (ES)
- Instituto de Química Médica (ES)
- Instituto de Química Física Blas Cabrera (ES)
- Instituto de Química Orgánica General (ES)
Publication Details
- Journal
- Journal of the European Ceramic Society
- Published
- 2025-10-29
- DOI
- https://doi.org/10.1016/j.jeurceramsoc.2025.117929
- Primary Topic
- Magnetic Properties and Synthesis of Ferrites
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- European Commission
- European Synchrotron Radiation Facility
- Consejo Superior de Investigaciones Científicas
- European Regional Development Fund
- Agencia Estatal de Investigación
- European Social Fund