New Superconducting Material
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Estudo das propriedades supercondutoras da fase T2 no sistema Nb-Si-B / Study of superconducting properties of the T2 phase in the system Nb-Si-B.
Este trabalho tem como objetivo o estudo da influência do boro na fase αNb5Si3 (Fase T2) a baixas temperaturas analisando suas propriedades elétricas e magnéticas. Para o estudo deste tema as amostras foram preparadas, seguindo a estequiometria Nb5Si3-xBx, via metalurgia do pó e também por fusão a arco, com x dentro do intervalo limitado por 0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2010
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2. Aplicações de arranjos de antenas de microfita com patch supercondutor
This work has as main objective the study of arrays of microstrip antennas with superconductor rectangular patch. The phases and the radiation patterns are analyzed. A study of the main theories is presented that explain the microscopic and macroscopic phenomena of superconductivity. The BCS, London equations and the Two Fluid Model, are theories used in the
Publicado em: 2010
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3. Desenvolvimento de transdutores paramétricos de alta sensibilidade para o detector de ondas gravitacionais mario schenberg
- The main purpose of this work was to build a set of parametric transducers of reentrant cavity type with high sensitivity and pumped at to be used in the gravitational wave detector Mario Schenberg. These transducers will monitor the mechanical vibrations of the -diameter spherical antenna in the frequency range. Niobium with high Tantalum impurities and w
Publicado em: 2009
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4. Transição ordem-desordem da matéria de vórtices em supercondutores detectada através do terceiro harmônico da suscetibilidade AC
Although a vortex state, in type II superconductors, has been anticipated more than 50 years ago, a great deal of theoretical and experimental efforts has still been done in an attempt to investigate how the dynamics of these structures depends on external excitations and on the inherent properties of the underlying superconducting material, such as inhomoge
Publicado em: 2008
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5. Pinning of Abrikosov Vorticein MG B IND. 2 addition of NI nanoparticles / Aprisionamento dos Vortices de Abrikosov no MG B IND. 2 atraves da adição de nanoparticulas de NI
Since the discovery of the phenomenon of superconductivity in magnesium diboride (MgB2) in the year 2001, the vortex dynamics in this material has been widely studied, because this phenomenon can cause the destruction of the superconducting state. This study intends to assess the impact on the pinning of vortex and the behavior of the critical current densit
Publicado em: 2008
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6. ESTUDO DA FUSÃO E SOLIDIFICAÇÃO DA FASE BI-2212 E SEUS MECANISMOS DE SUPERCONDUÇÃO / STUDY OF BI-2212 PHASE MELTING AND SOLIDIFICATION AND ITS SUPERCONDUCTING MECHANISMS
High temperature superconductivity was discovered in 1986. Since then more than 150 new superconductors (cuprates, bismuthates, borides and fullerite) with critical temperature higher then 23,3K (the highest critical temperature for low temperature superconductors) have been synthesized. Many of them rise interest from the scientific viewpoint and are suitab
Publicado em: 2003
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7. Estudo da relaxação magnetica e fluxo retido em Niobio supercondutor : efeitos da superficie
We present in this work a study of the surface influence in magnetic relaxation of superconducting niobium. We also discuss the relevance of the sample surface condition on magnetic flux trapping associated with the occurrence of a paramagnetic frozen state. Magnetization measurements were made, using a SQUID magnetometer, on a single-crystal Nb bar, for dif
Publicado em: 1997