Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions
This article was published in the Journal of Physics C: Solid State Physics [© 1978 Journal of Physics C] and the Journal's website is at: http://iopscience.iop.org/article/10.1088/0022-3719/11/12/020/meta
| Autores principales: | , |
|---|---|
| Otros Autores: | |
| Formato: | Artículo |
| Lenguaje: | English |
| Publicado: |
© 1978 Journal of Physics C: Solid State Physics
2017
|
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/10361/8004 |
| id |
10361-8004 |
|---|---|
| record_format |
dspace |
| spelling |
10361-80042017-04-16T05:01:12Z Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions Edgar, A Haider, A F M Yusuf Department of Mathematics and Natural Sciences, BRAC University Off-centre displacement This article was published in the Journal of Physics C: Solid State Physics [© 1978 Journal of Physics C] and the Journal's website is at: http://iopscience.iop.org/article/10.1088/0022-3719/11/12/020/meta The electron paramagnetic resonance (EPR) spectra of Fe2+ and Fe3+ ions in single crystals of SrO are reported. Fe3+ ions occupy sites of orthorhombic symmetry and their EPR spectra have been fitted with an S=5/2 spin-Hamiltonian in which the dominant second-order terms have coefficient values of B20=(884.7+or-0.3)*10-4 cm-1 and B22=(-422.0+or-0.5)*10-4 cm-1. Fe2+ ions occur at sites of trigonal symmetry, and the single observed resonance line may be described by a spin-Hamiltonian with S'=1/2, gperpendicular to =0, g/sub ///=3.992+or-0.005 and A/sub ///(Fe57)=30.2+or-0.6*10-4 cm-1. Variable temperature experiments indicate that the Fe2+ resonance occurs between the two levels of a doublet lying 12+or-1 cm-1 above a ground state singlet. A lattice distortion calculation, based on a model of polarisable point ions, and which incorporates the crystal field stabilisation energy, is applied to the cases of Fe2+ and Mn2+ ions substituted into alkaline earth oxide host lattices. The calculation is used to support an interpretation of the spectroscopic data for SrO:Fe in which the trigonal Fe2+ site arises from an off-centre displacement of the Fe2+ ion along a (111) axis. Published 2017-04-09T05:49:13Z 2017-04-09T05:49:13Z 1978 Article Edgar, A., & Haider, Y. (1978). Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: Evidence for off-centre displacement of Fe2+ ions. Journal of Physics C: Solid State Physics, 11(12). Retrieved from http://iopscience.iop.org/article/10.1088/0022-3719/11/12/020/meta 0022-3719 http://hdl.handle.net/10361/8004 en http://iopscience.iop.org/article/10.1088/0022-3719/11/12/020/meta © 1978 Journal of Physics C: Solid State Physics |
| institution |
Brac University |
| collection |
Institutional Repository |
| language |
English |
| topic |
Off-centre displacement |
| spellingShingle |
Off-centre displacement Edgar, A Haider, A F M Yusuf Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions |
| description |
This article was published in the Journal of Physics C: Solid State Physics [© 1978 Journal of Physics C] and the Journal's website is at: http://iopscience.iop.org/article/10.1088/0022-3719/11/12/020/meta |
| author2 |
Department of Mathematics and Natural Sciences, BRAC University |
| author_facet |
Department of Mathematics and Natural Sciences, BRAC University Edgar, A Haider, A F M Yusuf |
| format |
Article |
| author |
Edgar, A Haider, A F M Yusuf |
| author_sort |
Edgar, A |
| title |
Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions |
| title_short |
Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions |
| title_full |
Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions |
| title_fullStr |
Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions |
| title_full_unstemmed |
Electron paramagnetic resonance spectra of Fe2+ and Fe3+ ions in SrO: evidence for off-centre displacement of Fe2+ ions |
| title_sort |
electron paramagnetic resonance spectra of fe2+ and fe3+ ions in sro: evidence for off-centre displacement of fe2+ ions |
| publisher |
© 1978 Journal of Physics C: Solid State Physics |
| publishDate |
2017 |
| url |
http://hdl.handle.net/10361/8004 |
| work_keys_str_mv |
AT edgara electronparamagneticresonancespectraoffe2andfe3ionsinsroevidenceforoffcentredisplacementoffe2ions AT haiderafmyusuf electronparamagneticresonancespectraoffe2andfe3ionsinsroevidenceforoffcentredisplacementoffe2ions |
| _version_ |
1814307327361155072 |