| dc.creator | Granado, E | |
| dc.creator | Pagliuso, PG | |
| dc.creator | Sanjurjo, JA | |
| dc.creator | Rettori, C | |
| dc.creator | Subramanian, MA | |
| dc.creator | Cheong, SW | |
| dc.creator | Oseroff, SB | |
| dc.date | 1999 | |
| dc.date | SEP 1 | |
| dc.date | 2014-12-02T16:25:06Z | |
| dc.date | 2015-11-26T16:12:21Z | |
| dc.date | 2014-12-02T16:25:06Z | |
| dc.date | 2015-11-26T16:12:21Z | |
| dc.date.accessioned | 2018-03-28T23:00:36Z | |
| dc.date.available | 2018-03-28T23:00:36Z | |
| dc.identifier | Physical Review B. American Physical Soc, v. 60, n. 9, n. 6513, n. 6516, 1999. | |
| dc.identifier | 0163-1829 | |
| dc.identifier | WOS:000082570400064 | |
| dc.identifier | 10.1103/PhysRevB.60.6513 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59516 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/59516 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/59516 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1267252 | |
| dc.description | Raman scattering of optical phonons in polycrystalline A(2)Mn(2)O(7) (A = Y, In, and Tl) are reported as a function of temperature. For A = In and Tl a hardening of the two lowest energy modes is observed below T-c that we associate to a phonon modulation of the exchange interaction. These data suggest superexchange as the mechanism responsible for magnetic ordering in these systems. All but one of the Raman modes in the In- and Tl-based compounds appear at lower frequencies when compared with those in the Y-based one. This frequency shift may be due to the strong hybridization of the Tl(In) 6s(5s) orbital with O 2p and Mn 3d, claimed by recent band-structure calculations on these materials. [S0163-1829(99)01733-6]. | |
| dc.description | 60 | |
| dc.description | 9 | |
| dc.description | 6513 | |
| dc.description | 6516 | |
| dc.language | en | |
| dc.publisher | American Physical Soc | |
| dc.publisher | College Pk | |
| dc.publisher | EUA | |
| dc.relation | Physical Review B | |
| dc.relation | Phys. Rev. B | |
| dc.rights | aberto | |
| dc.source | Web of Science | |
| dc.subject | Mn3+/mn4+ Double Exchange | |
| dc.subject | Pyrochlore Tl2mn2o7 | |
| dc.subject | Colossal Magnetoresistance | |
| dc.subject | Dynamics | |
| dc.subject | Crystals | |
| dc.subject | Order | |
| dc.subject | Tl | |
| dc.title | Phonon raman scattering in A(2)Mn(2)O(7) (A=Tl,In,Y) | |
| dc.type | Artículos de revistas | |
