%0 Journal Article %1 WOS:000170628400333 %A Guedes, I %A Mitchell, JF %A Argyriou, D %A Grimsditch, M %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2001 %I ELSEVIER SCIENCE BV %J JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS %K magnetoresistance; manganite} oxygen scattering; stoichiometry; {Raman %N 2, SI %P 1998-1999 %R 10.1016/S0304-8853(00)00675-2 %T Raman study of phonons in Sr3Mn2O6.54 and Sr3Mn2O7 layered manganites %V 226 %X Polycrystalline Sr3Mn2O6.54 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 I4/min structure, three additional modes are observed in the phonon spectrum of the oxygen-deficient Sr3Mn2O6.54 sample. Based on an analysis of the temperature dependence of the Raman spectrum of Sr3Mn2O6.54. and a comparison with the Raman spectrum of LaSr2Mn2O7, we conclude that the `extra' modes should be viewed as disorder-induced Raman scattering. (C) 2001 Elsevier Science B.V. All rights reserved.

@article{WOS:000170628400333, abstract = {Polycrystalline Sr3Mn2O6.54 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 I4/min structure, three additional modes are observed in the phonon spectrum of the oxygen-deficient Sr3Mn2O6.54 sample. Based on an analysis of the temperature dependence of the Raman spectrum of Sr3Mn2O6.54. and a comparison with the Raman spectrum of LaSr2Mn2O7, we conclude that the `extra' modes should be viewed as disorder-induced Raman scattering. (C) 2001 Elsevier Science B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {Guedes, I and Mitchell, JF and Argyriou, D and Grimsditch, M}, biburl = {https://www.bibsonomy.org/bibtex/2e99a7de00a072cf25209d4755b605539/ppgfis_ufc_br}, doi = {10.1016/S0304-8853(00)00675-2}, interhash = {5f14c06cdd2a4a14480ea943d1367552}, intrahash = {e99a7de00a072cf25209d4755b605539}, issn = {0304-8853}, journal = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS}, keywords = {magnetoresistance; manganite} oxygen scattering; stoichiometry; {Raman}, note = {International Conference on Magnetism, RECIFE, BRAZIL, AUG 06-11, 2000}, number = {2, SI}, organization = {CNPq; FINEP; CAPES; FACEPE; FAPEST; FAPERJ}, pages = {1998-1999}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Raman study of phonons in Sr3Mn2O6.54 and Sr3Mn2O7 layered manganites}, tppubtype = {article}, volume = 226, year = 2001 }