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Thermal stability of nonmagnetic Cd and In impurities in Fe3O4.
- Source :
- Journal of Applied Physics; 2016, Vol. 120 Issue 14, p1-7, 7p, 3 Diagrams, 6 Graphs
- Publication Year :
- 2016
-
Abstract
- Magnetite (Fe<subscript>3</subscript>O<subscript>4</subscript>) was doped with radioactive <superscript>111m</superscript>Cd and <superscript>111</superscript>In ions as impurities, and their residence sites and thermal stability were investigated by means of time-differential perturbed angular correlation (TDPAC) spectroscopy. Well-defined TDPAC spectra unequivocally show their sites: Cd ions are stably located only in the tetrahedral A site in all the temperature range of the present observation (77 K-873 K); In ions also specifically occupy the A site at low temperature, but at high temperature part of them select the B site in a reversible fashion. The energy difference between the A and B sites for the accommodation of In was experimentally determined to be 0.119 (9) eV by assuming a Boltzmann distribution for the populations of the <superscript>111</superscript>In probe in the respective sites. The element-dependent thermal stabilities observed for Cd and In were well corroborated by density functional theory calculations. The successful observation of thermally activated site-tosite displacement of impurity In ions in Fe<subscript>3</subscript>O<subscript>4</subscript> is reported. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 120
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 118874024
- Full Text :
- https://doi.org/10.1063/1.4964694