248 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- R. Casana71 · h 23
- M. M. Ferreira4 profiles69 · h 19
- Edilberto O. Silva3 profiles59 · h 18
- L. B. Castro3 profiles36 · h 17
- M. Schreck27 · h 19
- F. M. Andrade22 · h 17
- F. Simas21 · h 11
- A. R. Gomes20 · h 19
- C. Filgueiras19 · h 17
- E. da Hora3 profiles17 · h 5
- D. Bazeia2 profiles16 · h 40
- J. Reis2 profiles16 · h 8
- Universidade Federal da ParaíbaBR41 papers
- Universidade Estadual Paulista (Unesp)BR27 papers
- Instituto Federal do MaranhãoBR26 papers
- Universidade Federal do CearáBR24 papers
- Universidade Estadual de Ponta GrossaBR23 papers
- Universidade Federal de Campina GrandeBR21 papers
- Universidade de São PauloBR16 papers
- Universidade Federal de LavrasBR16 papers
- Universidade Federal do Espírito SantoBR16 papers
- Universidade Federal de Santa CatarinaBR15 papers
- Centro Brasileiro de Pesquisas FísicasBR14 papers
- Universidade Estadual da Região Tocantina do MaranhãoBR12 papers
12 papers · 1 filter
Resonant Raman Scattering and Optical Absorption Studies of Zn(II) Impurities in L-Alanine Single Crystal
A. Nonato, G. G. S. Teles, C. C. Silva +5
We present a study of low-concentration Zn (II) impurities in L-Alanine Single Crystal (ZNLA) employing resonant Raman scattering and optical absorption spectroscopy. By analyzing…
High-temperature structural phase transition and infrared dielectric features of La2CoMnO6
R. X. Silva, A. Nonato, R. L. Moreira +2
Temperature-dependent FAR-infrared reflectivity spectra of partially ordered magnetodielectric La2CoMnO6 is presented, from room temperature up to 675 K. A clear first-ordered stru…
Short-range antiferromagnetic interaction and spin-phonon coupling in La2CoMnO6 double perovskite
R. X. Silva, C. C. Santos, H. Reichlova +3
Weak antiferromagnetic (AF) interaction in the ferromagnetic (FM) partially ordered La2CoMnO6 (LCMO) was detected by Raman spectroscopy by monitoring spin-phonon coupling. Because…
Unusual effects of manual grinding and subsequent annealing process observed in Gd5.09Ge2.03Si1.88 compound
A. M. G. Carvalho, C. S. Alves, P. V. Trevizoli +3
The Gd5.09Ge2.03Si1.88 compound, as well as other magnetocaloric materials, certainly will not be used in their un-manufactured as-cast condition in future magnetic refrigeration a…
Boosting Room-Temperature Li Conductivity via strain in solid electrolytes for Lithium-ion Batteries
R. Mouta, C. W. A. Paschoal
Room-temperature (RT) conductivity of most candidates for solid electrolytes of miniaturized lithium-ion batteries is still 1-2 orders of magnitude below commercial requirements, t…
Spin-phonon coupling in BaFe12O19 M-type hexaferrite
Flávio M. Silva Júnior, Carlos W. A. Paschoal
The spin-phonon coupling in magnetic materials is due to the modulation of the exchange integral by lattice vibrations. BaFe12O19 M-type hexaferrite, which is the most used magneti…
Mechanism of luminescent enhancement in Ba2GdNbO6:Eu3+ perovskite by Li+ co-doping
Marcos Vinicius dos Santos Rezende, Mario Ernesto Giroldo Valério, Rodolpho Mouta +2
We investigated the Li+ ion incorporation in Ba2GdNbO6:Eu3+ perovskite by atomistic simulations based on energy minimization. We predicted the most probable sites occupied by Eu3+…
Spin-phonon coupling in Gd(Co1/2Mn1/2)O3 perovskite
R. X. Silva, H. Reichlova, X. Marti +4
We have investigated the temperature-dependent Raman-active phonons and the magnetic properties of Gd(Co1/2Mn1/2)O3 perovskite ceramics in the temperature range from 40 K to 300 K.…
Synthesis and structural ordering of nano-sized Ba3B'Nb2O9 (B'= Ca and Zn) powders
João Elias Figueiredo Soares Rodrigues, Débora Morais Bezerra, Adeilton Pereira Maciel +1
In this work we investigated the phase formation and structural ordering of BaBNbO (B Ca and Zn) perovskite powders obtained by a modified polymer…
Ordering and phonons in BaCaNbO complex perovskite
João Elias Figueiredo Soares Rodrigues, Edvan Moreira, Débora Morais Bezerra +2
In this work we performed a detailed investigation about ordering in \bcn perovskite. The sintering temperature and time were changed to obtain samples with different ordering. The…
Spin-Phonon coupling in YNiMnO double perovskite probed by Raman spectroscopy
Raimundo Bezerra Macedo Filho, Alejandro Pedro Ayala, Carlos William de Araujo Paschoal
We performed Raman spectroscopy measurements under temperature changes from 10 K up to 850 K to probe the phonon-spin coupling in YNiMnO. The spin-phonon coupling was obser…
About the tolerance factor for pyrochlores and related structures
Rodolpho Mouta Monte Prado, Rosivaldo Xavier Silva, Carlos William de Araujo Paschoal
In this work a new empirical tolerance factor for compounds with pyrochlore structure is proposed. This suggested tolerance factor is based on experimental structural data and on t…