%0 Journal Article %1 WOS:000165717200004 %A Guedes, I %A Mitchell, JF %A Argyriou, D %A Grimsditch, M %C ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA %D 2000 %I AMER PHYSICAL SOC %J PHYSICAL REVIEW B %K imported %N 21 %P 13809-13811 %R 10.1103/PhysRevB.62.13809 %T Oxygen stoichiometry in Sr3Mn2O7-delta: A Raman scattering investigation %V 62 %X Polycrystalline Sr3Mn2O6.5 and Sr3Mn2O7 layered manganites were studied at room temperature using Raman spectroscopy. While the phonon spectrum of the stoichiometric Sr3Mn2O7 sample is consistent with the group theoretical analysis for the 14/mmm structure, additional features are observed in the phonon spectrum of the oxygen deficient Sr3Mn2O6.5 sample. Based on an analysis of the temperature dependence of the Raman spectrum of Sr3Mn2O6.5 and a comparison with the Raman spectrum of La0.4Sr2.6Mn2O7-delta (delta= 0.0 and 0.35), we conclude that the `extra' modes should be viewed as disorder induced Raman scattering.

@article{WOS:000165717200004, abstract = {Polycrystalline Sr3Mn2O6.5 and Sr3Mn2O7 layered manganites were studied at room temperature using Raman spectroscopy. While the phonon spectrum of the stoichiometric Sr3Mn2O7 sample is consistent with the group theoretical analysis for the 14/mmm structure, additional features are observed in the phonon spectrum of the oxygen deficient Sr3Mn2O6.5 sample. Based on an analysis of the temperature dependence of the Raman spectrum of Sr3Mn2O6.5 and a comparison with the Raman spectrum of La0.4Sr2.6Mn2O7-delta (delta= 0.0 and 0.35), we conclude that the `extra' modes should be viewed as disorder induced Raman scattering.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}, author = {Guedes, I and Mitchell, JF and Argyriou, D and Grimsditch, M}, biburl = {https://www.bibsonomy.org/bibtex/24ce0c3743ed56806814638f0a1271df1/ppgfis_ufc_br}, doi = {10.1103/PhysRevB.62.13809}, interhash = {904db5b87a9165b2ccb87adc00d0de16}, intrahash = {4ce0c3743ed56806814638f0a1271df1}, issn = {1098-0121}, journal = {PHYSICAL REVIEW B}, keywords = {imported}, number = 21, pages = {13809-13811}, publisher = {AMER PHYSICAL SOC}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Oxygen stoichiometry in Sr3Mn2O7-delta: A Raman scattering investigation}, tppubtype = {article}, volume = 62, year = 2000 }