Výsledky vyhledávání - "N. J. H. Gallo"

Growth and characterization of photorefractive Bi12TiO20 single crystals

Autor: P. M. Garcia, N. J. H. Gallo, A. A. Freschi, José Pedro Andreeta, Alexei A. Kamshilin, J.F. Carvalho, J. Maracaiba, Antônio Carlos Hernandes, T. Jaaskelainen, J. Frejlich, Victor V. Prokofiev

Publikováno v: Scopus-Elsevier

Photorefractive Bi 12 TiO 20 single crystals of high optical quality were grown in a resistive heating furnace from high temperature nonstoichiometric (10: 1) solutions of Bi 2 O 3 and TiO 2 at pulling rates 0.3-0.8 mm/h at rotation 20-30 rpm along t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::253a7f25f432c0000852c0bd2621191e
https://doi.org/10.1002/crat.2170300205

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Electric field influence in dopant segregation in the LiNbO3: Cr3+ crystal growth process

Autor: N. J. H. Gallo, E. S. Octaviano, J. P. Andreeta

Publikováno v: Journal of Materials Science. 28:65-68

We observed, in melt crystal growth experiments, the influence of electric field on the effective segregation coefficient. An expression was developed, based on the equation of Burton, Prim and Slichter, to explain these phenomena in the crystal grow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::031159baf5b9ffa83ed2d86468242eab
https://doi.org/10.1007/bf00349034

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Coupled Pairs of Cu+OCN− in KCl Studied by Optical Absorption and Thermally Stimulated Depolarization Current

Autor: E. C. Domenicucci, P. Magna, M. Siu Li, Larissa H. Oliveira, N. J. H. Gallo

Publikováno v: physica status solidi (b). 171:141-151

Cu+-OCN− coupled pairs are observed through a systematic correlation study of different KCl + 1 at% CuCl, KCl + 1 at% KOCN, and KCl + 1 at% KOCN + 1 at% CuCl single crystals. The optical absorption measurements show that the forbidden 3d10 + 3d94s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::105b9da73ad804e2df98a01823bd4442
https://doi.org/10.1002/pssb.2221710115

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Growth and homogeneity of Cr+3 doped GdA103 single crystals

Autor: N. J. H. Gallo, José Pedro Andreeta, Antônio Carlos Hernandes

Publikováno v: Materials Research Bulletin. 25:51-56

We describe systematic High-Temperature Solution crystal growth experiments on Cr+3 doped GdA103, where the flux and or solute stoichiometry was changed for process optimization to obtain homogeneous and inclusion free larger crystals. Transparent si

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3060aa69e30da48b22da737cc1c76a24
https://doi.org/10.1016/0025-5408(90)90161-t

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Superconducting BiSrCaCuO system and organic reaction

Autor: R.F.R. Pereira, Antônio Carlos Hernandes, José Pedro Andreeta, M. R. Amaral, N. J. H. Gallo, H. S. Amorim

Publikováno v: Journal of Materials Science Letters. 9:901-903

Tentatives d'intercalation de molecules neutres dipolaires dans les plans de base de la structure lamellaire du materiau supraconducteur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da7fa2c4189e980d7b1006cfe7db1582
https://doi.org/10.1007/bf00722164

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Direct observation of the structural defects in oxide superconductors of highT c single crystal

Autor: José Pedro Andreeta, V. A. Botura, A. A. Martin, N. J. H. Gallo, Antônio Carlos Hernandes

Publikováno v: Journal of Materials Science Letters. 8:1262-1263

Utilisation de l'attaque chimique qui a permis l'observation directe de dislocations et probablement d'un defaut d'empilement dans des monocristaux obtenus par la methode HTS (methode en solution a haute temperature). Il est possible d'optimiser la c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01b14977f19866b139db98ac622a5789
https://doi.org/10.1007/bf00721486

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