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Doctoral Thesis defence of Marielli de Souza Schlickmann – 02/December/2016 – monday – Times: 2:00 am
Publicado em 28/11/2016 às 03:05 PMThe Physics Graduate Program invites everyone to:
Defense of Doctoral Thesis
Marielli de Souza Schlickmann
Dissecando galáxias: metais, poeira, gás, atividade nuclear e formação estelar
Defense Committee:
Prof. Dr. Roberto Cid Fernandes Junior – (president) – UFSC/FSC
Profª. Drª. Thaisa Storchi Bergmann – (external member) – UFRGS/IF
Profª. Drª. Grazyna Stasinska – (external member) – Observatório de Paris
Dr. André Luiz de Amorim – (membro titular) – UFSC/FSC
Profª. Drª. Natalia Vale Asari – (local member) – UFSC/FSC
Dr. Daniel Ruschel Dutra – (local member) – UFSC/FSC
Date: 02/December/2016 – monday – Times: 2:00 am – Place: Sala 212 – Auditório do Departamento de Física
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Seminar with prof. Dr. Fabien Durola – 02/December/2016 – 10:00am
Publicado em 25/11/2016 às 11:38 AMTHE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:
Copper-based molecular machines
Dr. Fabien Durola
CRPP, University of Bordeaux – França
Abstract:
The Nobel Prize in Chemistry 2016 was awarded jointly to Jean-Pierre Sauvage, Sir J. Fraser Stoddart and Bernard L. Feringa “for the design and synthesis of molecular machines”. Always Involving interlocked molecules such as catenanes and rotaxanes, the molecular machines developped by the group of Jean-Pierre Sauvage during the last 25 years are all based on the dynamic coordinating properties of transition metals, and mainly copper. From the first twisting catenane to the molecular press, this presentation will focus on the evolution of these copper-based molecular machines.
PS. From 2003 to 2008 Dr. Durola worked in Jean-Pierre’s group.
Date: 02/December/2016 – (friday) – Place: Auditório do Departamento de Química- Time: 10:00am
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Qualifying Examination for Doctoral Thesis of Ian Jordy Lopez Diaz – 2/December/2016 – friday – 9:00 am
Publicado em 25/11/2016 às 12:52 AMThe Physics Graduate Program invites everyone to:
Qualifying Examination for Doctoral Thesis
Ian Jordy Lopez Diaz
Simulações de Monte Carlo de um modelo de ising com plano não equivalentes
Defense Committee:
Prof. Dr. Nilton da Silva Branco – (president) – UFSC/FSC
Prof. Dr. Álvaro de Almeida Caparica – (external member) – UFG
Prof. Dr. Wagner Figueiredo – (local member) – UFSC/FSC
Prof. Dr. Lucas Nicolao – (local member) – UFSC/FSC
Prof. Dr. Márcio Santos – (external member) – UFSC/FSC
Date: 2/December/2016 – friday – Time: 8:30 am – Place: Sala 212 – Auditório do Departamento de Física
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Doctoral Thesis defence of Luiz Laércio Lopes – 21/November/2016 – monday – Times: 9:40 am
Publicado em 16/11/2016 às 07:47 AMThe Physics Graduate Program invites everyone to:
Defense of Doctoral Thesis
Luiz Laércio Lopes
Equações de Estado em Física de Hádrons
Defense Committee:
Profª. Drª. Débora Peres Menezes – (president) – UFSC/FSC
Prof. Dr. Rafael Cavagnoli – (external member) – UFPEL
Prof. Dr. Luis Rafael Benito Castro – (external member) – UFMA
Prof. Dr. Sidney dos Santos Avancini – (membro titular) – UFSC/FSC
Prof. Dr. Marcus Emmanuel Benghi Pinto – (local member) – UFSC/FSC
Prof. Dr. Alexandre Magano Silva Santos – (local member) – UFSC/FSC
Date: 21/November/2016 – monday – Times: 9:40 am – Place: Sala 212 – Auditório do Departamento de Física
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Seminar with prof. Prof. Dr. Eduardo Cantera Marino – 18/November/2016 – 10h15min
Publicado em 14/11/2016 às 08:10 AMTHE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:
Beleza e Verdade: Aspectos da Teoria Quântica de Campos na Física da Matéria Condensada
Prof. Dr. Eduardo Cantera Marino
Instituto de física / UFRJ
Abstract:
Descrevemos diversos exemplos de aplicação dos métodos da Teoria de Campos em sistemas de Matéria Condensada que revelam amplamente a presença destas duas qualidades. Abordamos, em particular, os seguintes casos:
o Mecanismo de Higgs-Anderson e o Efeito Meissner, em física de partículas e supercondutores; os Mecanismos de Yukawa e Peierls, em física de partículas e polímeros; a Teoria Relativística de Dirac no grafeno e no siliceno; as propriedades de anyons não-abelianos e a computação quântica, estados topologicos da materia e, finalmente, os Férmions de Weyl, recentemente descobertos nos semimetais TaAs e NbAs.
Date: 18/November/2016 – (friday) – Place: Sala 212 – Auditório do Departamento de Física- Time: 10h15min
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Defence of M.Sc. dissertation of Vanessa Pitirini Guarienti – 16/November/2016 – 9:00 am
Publicado em 13/11/2016 às 07:49 AMThe Physics Graduate Program invites everyone to:
Defence of M.Sc. dissertation
Vanessa Pitirini Guarienti
Computação Quântica Adiabática em Sistemas Relativísticos
Defense Commitee
Prof. Dr. Eduardo Inacio Duzzioni – (president) – UFSC/FSC
Prof. Dr. Ardiley Torres Avelar – (external member) – UFG
Prof. Dr. Eduardo Cerutti Mattei – (local member) – UFSC/FSC
Prof. Dr. Kahio Tibério Mazon – (local member) – UFSC/FSC
Date: 16/November/2016 – wednesday – Time: 9:00 am – Place: Sala 114 – Sala de Reuniões do Departamento de Física
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(Português) Divulgação do Processo Seletivo para ingresso no Programa de Pós-Graduação em Física da Universidade Federal de Santa Catarina (PPGFSC/UFSC)
Publicado em 07/11/2016 às 10:00 AM -
(Português) Two visiting foreign professor positions at the Physics Department of the Federal University of Santa Catarina – Florianópolis – Brazil
Publicado em 07/11/2016 às 08:00 AM -
Seminar with prof. Rafael Domingues Della Pace – 4/November/2016 – 10h15min
Publicado em 03/11/2016 às 10:55 AMTHE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:
Study of magnetic tunnel junctions with insulating barriers piezoelectric of AlN
Rafael Domingues Della Pace
UFSC/FSC
Abstract:
The 90s saw a huge breakthrough in relations between resistivity and magnetic fields. The ordinaries and anisotropic magnetoresistence, know for more the century, were also included new phenomena such as giant magnetoresistance, colossal, inversion of magnetization by injecting currents and polarized quantum tunneling dependent on spin. These new effects enabled a huge advance in understanding of the fundamentals in solid state and a number of new technologies already in use or under development. Magnetic tunnel junction (MTJ) were first preformed experimentally in the early 70 [1], but reproducible results were achieved only 20 years later. Then follows extensive research in the fields magnetic tunnel junction with insulating barrier amorphous AlOx, TiOx e SiO2, coming to a limit on the tunnel magnetoresistance (TMR) de 70%, room temperature and low fields, using electrodes CoFeSiB and amorphous barrier AlOx[2,3]. Butler and Mathon in 2001 [4,5] predicted, through calculation from first principles, a tunnel junction Fe/MgO/Fe with epitaxial growth of MgO barrier and with directed <001>, a TMR above 1000% could be reached. A few years later experimental groups [6,7,8] obtained results for a rate of TMR 180% and 220%. With the development in this area, which is now called spin electronics or spintronics simply, other interconnections between magnetic and electric properties were explored, among these have highlighted the ferroelectric and multiferroic materials. Emerging a new concept in tunnel junctions, where we as a barrier piezoelectric and/or ferroelectric materials, which leads to the tunnel junctions ferroelectric (FTJ) and tunnel junctions multiferróicas (MFTJ) [9]. Magnetic tunnel junctions with aluminum nitride barrier (AlN – highly textured), and electrodes of CoFeSiB were studied. Both AlN barrier as the electrodes were grown by magnetron sputtering.It is grown barrier in a reactive atmosphere with 20% of nitroĝeino (N2). Structural characterization were made using diffraction of x-ray (XRD) and transmission electron microscopy (TEM), they showed that even for very thin thicknesses of AlN, around 6 and 8 nm was possible to obtain textured films in the direction (002) and thereby obtain the effect of piezoelectricity. Through the electrical measurements it was possible to show that there is an electric polarization in the joints, where it measures the mechanical stresses were applied to the junction occurred a significant change in IxV curve. It also found one electrical hysteresis curves in IxV.
[01] JULLIERE, M., Phyc. Rev. Lett. A, Vol.54,225, (1975);
[02] WANG, D.et. al., IEEE Trans. Mag., Vol 40, No 4 (2004);
[03] SAKURABA, Y., et al., 44, L1100 (2005);
[04] MATHON, J.; UMERSKI, A., Phys. Rev. B, Vol. 63, 220403,(2001);
[05] BUTLER, W. H.; et aL., Phys. Rev. B, Vol. 63, 054416 (2001);
[06] YUASA, S., et al., Jour. App. Phys., Vol. 43, No 3 , L 588, (2004);
[07] YUASA, et al.,, Jpn.J. Appl. Phys., Vol. 43, L588 (2004);
[08] PARKIN, S.,KRONMULLER, H., “Handbook of Magnetism and Advance Magnetic Materials , First Editions;
[09] TSYMBAL, E.Y., et. al.,Vol. 37, 2012, www.mrs.org/bulletin;Date: 4/November/2016 – (friday) – Place: Sala 212 – Auditório do Departamento de Física- Time: 10h15min
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(Português) Relato da 175ª Reunião Ordinária do Colegiado Delegado do Programa de Pós-Graduação em Física da UFSC
Publicado em 24/10/2016 às 02:28 PM