%0 Journal Article %1 WOS:000275028900028 %A Silva, E N %A Guedes, I %A Ayala, A P %A Lopez, C A %A Augsburger, M S %A del Viola, M C %A Pedregosa, J C %C CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA %D 2010 %I AMER INST PHYSICS %J JOURNAL OF APPLIED PHYSICS %K Raman compounds; compounds} crystal groups; infrared iron phonons; space spectra; strontium structure; {calcium %N 4 %R 10.1063/1.3309259 %T Optical-active phonons in A(3)Fe(2)B(')O(9) (A=Ca, Sr; B-'=Te, W) double perovskites %V 107 %X Raman scattering and infrared transmittance techniques are used to investigate the phonons of the Sr3Fe2TeO9 (SFTO), Sr3Fe2WO9 (SFWO), and Ca3Fe2WO9 (CFWO) double perovskites at 300 K. While SFTO and SFWO crystallize in a tetragonal structure belonging to the I4/m space with two formulas per unit cell (Z=2), CFWO crystallizes in a monoclinic structure belonging to the space group P2(1)/n with Z=2. The observed spectra are very similar to that of the prototype cubic (Fm3m) double perovskite, indicating that both the tetragonal and monoclinic structures result from small distortions of the cubic cell. The assignment of the optical phonons follows that given for the prototype Fm3m double perovskites.

@article{WOS:000275028900028, abstract = {Raman scattering and infrared transmittance techniques are used to investigate the phonons of the Sr3Fe2TeO9 (SFTO), Sr3Fe2WO9 (SFWO), and Ca3Fe2WO9 (CFWO) double perovskites at 300 K. While SFTO and SFWO crystallize in a tetragonal structure belonging to the I4/m space with two formulas per unit cell (Z=2), CFWO crystallizes in a monoclinic structure belonging to the space group P2(1)/n with Z=2. The observed spectra are very similar to that of the prototype cubic (Fm3m) double perovskite, indicating that both the tetragonal and monoclinic structures result from small distortions of the cubic cell. The assignment of the optical phonons follows that given for the prototype Fm3m double perovskites.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA}, author = {Silva, E N and Guedes, I and Ayala, A P and Lopez, C A and Augsburger, M S and del Viola, M C and Pedregosa, J C}, biburl = {https://www.bibsonomy.org/bibtex/288b15b20e92d625245fcbbc743af1739/ppgfis_ufc_br}, doi = {10.1063/1.3309259}, interhash = {3e6db030e7cd4e83916a596d2b6e84df}, intrahash = {88b15b20e92d625245fcbbc743af1739}, issn = {0021-8979}, journal = {JOURNAL OF APPLIED PHYSICS}, keywords = {Raman compounds; compounds} crystal groups; infrared iron phonons; space spectra; strontium structure; {calcium}, number = 4, publisher = {AMER INST PHYSICS}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Optical-active phonons in A(3)Fe(2)B(')O(9) (A=Ca, Sr; B-'=Te, W) double perovskites}, tppubtype = {article}, volume = 107, year = 2010 }