Zobrazeno 1 - 10
of 10
pro vyhledávání: '"R. J. Prado"'
Autor:
E. H. Coldebella, R. J. Prado, A. P. Albuquerque, M. Alzamora, E. F. Chagas, E. Baggio-Saitovitch
Publikováno v:
Journal of Nanoscience and Nanotechnology. 21:5181-5187
We report an experimental study of the bimagnetic nanocomposites CoFe2/CoFe2O4. The precursor material, CoFe2O4 was prepared using the conventional stoichiometric combustion method. The nano-structured material CoFe2/CoFe2O4 was obtained by total oxy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f57e049859b5892f8787fa17c83f26b6
https://doi.org/10.1166/jnn.2021.19369
https://doi.org/10.1166/jnn.2021.19369
Autor:
E H, Coldebella, E F, Chagas, A P, Albuquerque, R J, Prado, M, Alzamora, E, Baggio-Saitovitch
Publikováno v:
Journal of nanoscience and nanotechnology. 21(10)
We report an experimental study of the bimagnetic nanocomposites CoFe₂/CoFe₂O₄. The precursor material, CoFe₂O₄ was prepared using the conventional stoichiometric combustion method. The nano-structured material CoFe₂/CoFe₂O₄ was obtai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e8a0819fa91bd955dc9587a098ede7cd
https://pubmed.ncbi.nlm.nih.gov/33875104
https://pubmed.ncbi.nlm.nih.gov/33875104
Publikováno v:
Surface Science
Surface Science, Elsevier, 2004, 553 (1-3), pp.115. ⟨10.1016/j.susc.2004.01.054⟩
Surface Science, Elsevier, 2004, 553 (1-3), pp.115. ⟨10.1016/j.susc.2004.01.054⟩
The adsorption site of sodium on the TiO2(1 1 0)–(1 × 1) surface was studied by extended X-ray absorption fine structure. For coverage ranging between 0.25 and 0.5 ML, we find that sodium is on an ‘in-between' site where it is bound to two bridg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ea2cd33cefbd462014c4c3987216e1a
https://doi.org/10.1016/j.susc.2004.01.054
https://doi.org/10.1016/j.susc.2004.01.054
We prepared very high-coercivity cobalt ferrite nanoparticles synthesized by a combustion method and using short-time high-energy mechanical milling to increase strain and the structural defects density. The coercivity (HC) of the milled sample reach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c93d99ef74285518cb5ad72f2a4289f1
http://arxiv.org/abs/1404.2965
http://arxiv.org/abs/1404.2965
Autor:
R. J. Prado, E. Baggio-Saitovitch, Ailton José Terezo, G.C.P. Leite, E. F. Chagas, R. Pereira, M. Alzamora
In this work we report a study of the magnetic behavior of ferrimagnetic oxide CoFe2O4 and ferrimagnetic oxide/ferromagnetic metal CoFe2O4/CoFe2 nanocomposites. The latter compound is a good system to study hard ferrimagnet/soft ferromagnet exchange
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a726297733dfc4d887b99b8e324c14f
Autor:
J. M. Ramallo Lopez, Sergio Gustavo Marchetti, Jose Fernando Bengoa, Félix G. Requejo, S. J. Stewart, Santiago J. A. Figueroa, R. J. Prado
Publikováno v:
Physical Review B. 75
The nonequilibrium cation site occupancy in nanosized zinc ferrites $(\ensuremath{\sim}6--13\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ with different degree of inversion ($\ensuremath{\sim}0.2$ to 0.4) was investigated using Fe and Zn $K$-edge x-ray ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0eef05f492904b1d45b94ba53200cb23
https://doi.org/10.1103/physrevb.75.073408
https://doi.org/10.1103/physrevb.75.073408
Publikováno v:
Physica Scripta. :552
In this work, we analyze and correlate information obtained from XANES, EXAFS and NMR on a SiO2 aggregate attacked by Alkali Silica Reaction (ASR). EXAFS and XANES results enable local order evaluation during the amorphization process within the aggr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47ae716be30e58edd2487d12df66cc63
https://doi.org/10.1238/physica.topical.115a00552
https://doi.org/10.1238/physica.topical.115a00552
Autor:
R. J. Prado, A. M.Flank
Publikováno v:
Physica Scripta. :165
Sodium K edge XANES calculations were performed for sodium halides, using the last version of the ab-initio FEFF code, and compared with the experimental data. Several FEFF parameters were varied during calculations, aiming to investigate their influ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00c6340cd10a5b4d135c582e69dc40aa
https://doi.org/10.1238/physica.topical.115a00165
https://doi.org/10.1238/physica.topical.115a00165
Publikováno v:
Physica Scripta. :531
The adsorption site of sodium atoms deposited onto a clean TiO2(110) surface has been determined by EXAFS. The best result is obtained for an 'in-between' site where the sodium is bound to two bridging oxygen atoms at 2.25 A and one in-plane one at 2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b159fb1e5b2f171ad032c5389cdaee8
https://doi.org/10.1238/physica.topical.115a00531
https://doi.org/10.1238/physica.topical.115a00531
Publikováno v:
Physica Scripta. :320
By evaporation on a clean native or thermal silica film, sodium atoms incorporate into the silica network and Na becomes surrounded by a well defined local structure. Exposure to oxygen transforms this (Na + SiO2) glassy system to a crystallized comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00687bd694b3fa3bb14cc2cbdb048cfd
https://doi.org/10.1238/physica.topical.115a00320
https://doi.org/10.1238/physica.topical.115a00320