The Physics Graduate Program invites everyone to:

  Defence of M.Sc. dissertation

 Cristian Andrey Momoli Salla

 COMPLEXOS DE RUTÊNIO APLICADOS EM OLEDS: SÍNTESE E CARACTERIZAÇÃO

Defense Commitee

 Prof. Dr. Ivan Helmuth Bechtold – (president) – FSC/UFSC

Dr. Welber Gianini Quirino – (external member) – INMETRO/RJ

Prof. Dr. Bernardo de Souza – (local member) – UFSC/QMC

Prof. Dr. Carlos Eduardo Maduro de Campos – (Local member) – UFSC/FSC

 Date: 07/August/2015 – friday – Time: 8:30am – Place: Auditório do LAED – (piso térreo do Departamento de Matemática)

 The Physics Graduate Program invites everyone to:

 Defence of M.Sc. dissertation

 Guilherme Dalla Lana Semione

 PRODUÇÃO E ESTUDO DE SULFETOS DE NÍQUEL NANOMÉTRICOS COM SUBSTITUIÇÃO PARCIAL DE PALÁDIO

Defense Commitee

 Prof. Dr. Valderes Drago – (president) – FSC/UFSC

Prof. Dr. Alexandre da Cas Viegas – (external member) – UFRGS/IF

Prof. Dr. André Avelino Pasa – (local member) – UFSC/FSC

Prof. Dr. Lucio Sartori Farenzena – (local member) – UFSC/FSC

Date: 07/August/2015 – friday – Time: 2:00 pm – Place: Sala 212 – Auditório do Departamento de Física

The Physics Graduate Program invites everyone to:

 Defense of Doctoral Thesis

 Genaldo Leite Nunes

Difusibilidade em meios porosos via modelagem computacional

Defense Committee:

 Prof. Dr. Wagner Figueiredo – (president) – FSC/UFSC

Prof. Dr. Kleber Daum Machado – (external member) – UFPR/FSC

Prof. Dr. Edio Cunha da Costa – (external member) – UDESC/Joinville

Prof. Dr. Luis Guilherme de Carvalho Rego – (membro titular) – UFSC/FSC

Prof. Dr. Nilton da Silva Branco – (local member) – UFSC/FSC

Prof. Dr. André Avelino Pasa – (local member) – UFSC/FSC

Date: 7/August/2015 – friday – Times: 9:30 am – Place: Sala 212 – Auditório do Departamento de Física

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THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar: 

  “Cosmological implications of the Yang-Mills vacuum and Dark Energy” 

ROMAN PASECHNIK – Lund University

Abstract:

In my talk I will discuss important implications of the Yang-Mills (in particular, QCD) vacuum dynamics in Cosmology. Such important aspects as compensation of non-perturbative vacua at large distances, de-Sitter solutions of Einstein-Yang-Mills equations with homogeneous SU(2) condensate accounting for the vacuum polarisation, possibility for Cosmic Inflation driven by the Yang-Mills condensate and generation of Dark Energy as a gravitational correction to the QCD ground state energy will be discussed in some basic details.

Date: 24/July/2015 – (friday) – Place: Sala 212 – Auditório do Departamento de Física– Time: 10h15min

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar: 

  Vignettes from the world of liquid crystals 

Peter Palffy-Muhoray

Liquid Crystal Institute, Kent State University – USA

Abstract:

Liquid crystals, discovered some 125 years ago, are orientationally ordered soft materials. Although they have received considerable attention – much of it due to their potential for applications in display devices – they continue to astonish, puzzle and delight. In this talk, I will describe some unusual phenomena in liquid crystalline systems which originate in orientational order. I will discuss ideas about the underlying physics, and indicate some intriguing problems that remain unsolved.

Date: 15/July/2015 – (wednesday) – Place: Sala 212 – Auditório do Departamento de Física– Time: 10h15min

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar: 

Domain growth and dipolar bias in magnetic thin films coupled to aperiodic pinning potential 

Prof. Dr. Rafael Leonardo Novak

UFSC / Campus Blumenau

Abstract:

Domain walls are playing an increasingly important role in new, experimental data storage technologies, as they can be easily manipulated by current and/or magnetic and electric fields. Controllable pinning is paramount for these applications and extrinsic, non-traditional sources of domain wall pinning, such as spatially varying dipolar fields and focused ion beam irradiation, have been proposed as means of tailoring magnetization reversal and domain wall pinning over short length scales. Here we detail magneto-optical studies of domain wall motion and domain wall mediated switching in a continuous, magnetically soft, ultrathin [Pt/Co]x (x = 1 or 2) film with perpendicular anisotropy which is coupled to an array of harder [Co/Pt]4 magnetic nanodots via dipolar interaction across a thin Pt spacer. In the absence of nanodots, the domain wall dynamics is dominated by thermally activated creep, while the stray field underneath the nanodot array gives rise to a spatially periodic pinning potential for domain walls propagating through the underlying continuous film which leads to field-asymmetric reversal and exchange-bias-like phenomena. We observe strikingly different domain wall morphologies depending on the field polarity and the strength of the coupling between the nanodots and the underlying layer, as well as domain wall velocity differences of up to 3 orders of magnitude and transitions from compact faceted to percolation-like dendritic domain wall propagation modes. We show that the average domain wall mobility of a magnetic thin film can be controlled by an external parameter, in this casethe magnetization state of an array of magnetic nanodots, opening the possibility of controlling domain wall propagation paths in thin magnetic films.

Date: 08/July/2015 – (wednesday) – Place: Sala 212 – Auditório do Departamento de Física- Time: 16 horas

 The Physics Graduate Program invites everyone to:

 Defence of M.Sc. dissertation

 Rafael Luiz Bernardi

 CCARACTERIZAÇÃO DE UM MODULADOR ESPACIAL DE LUZ COMO SIMULADOR DE TURBULÊNCIA ATMOSFÉRICA EM ÓPTICA ADAPTATIVA

Defense Commitee

 Prof. Dr. Antônio Nemer Kanaan Neto – (president) – UFSC/FSC

Prof. Dr. Alexandre José Tuoto Silveira Mello – (external member) – UFTPR

Prof. Dr. Paulo Henrique Souto Ribeiro – (local member) – UFSC/FSC

Profª. Drª. Natalia Vale Asari – (local member) – UFSC/FSC

 Date: 06/July/2015 – monday – Time: 2:00 pm – Place: Sala 212 – Auditório do Departamento de Física