El posgrado en el marco del Espacio Europeo de Educación

La adaptación de la oferta académica de postgrado al Espacio Europeo de Educación Superior en España no ha seguido el desarrollo que la lógica de la nueva ordenación de enseñanzas exigía, dando como resultado una adaptación con evidentes carencias que, aún pasando el umbral de 2010, serán temas de agenda pendiente por resolver en la reforma universitaria. El proceso para la definición del marco normativo ha seguido causes más políticos que estratégicos en el diseño de los nuevos estudios oficiales, dotando al proceso de convergencia elementos de confusión de cara a la comunidad universitaria. El marco para el desarrollo de las competencias de los estudios de postgrado y el sistema de garantía de la calidad en el mismo son dos de los temas que destacan por su deficiente desarrollo, y a los cuáles habrá que hacer frente inexcusablementeThe adaptation of the post grade curricula to the European Higher Education Area has not followed a logic way based on the new studies structure approved. The results obtained shows several lacks that, once passed the 2010 goal, will be schedule issues to resolve for the higher education reform. The legislative process has followed a political way instead of a strategic in the new official studies, giving to the university community more confusion elements about the convergence. The frame for the development of the competences in the post grade studies and also the quality assessment system for these studies are two of the themes that arise for its deficient design, that universities and government must face on

Field-induced magnetic behavior in quasi-one-dimensional Ising-like antiferromagnet BaCo2V2O8: A single-crystal neutron diffraction study

BaCo2V2O8 is a nice example of a quasi-one-dimensional quantum spin system that can be described in terms of Tomonaga-Luttinger liquid physics. This is explored in the present study where the magnetic field-temperature phase diagram is thoroughly established up to 12 T using single-crystal neutron diffraction. The transition from the N\'eel phase to the incommensurate longitudinal spin density wave (LSDW) phase through a first-order transition, as well as the critical exponents associated with the paramagnetic to ordered phase transitions, and the magnetic order both in the N\'eel and in the LSDW phase are determined, thus providing a stringent test for the theory.Comment: 17 pages with 15 figure

Neutron diffraction investigation of the H-T phase diagram above the longitudinal incommensurate phase of BaCo2V2O8

The quasi-one-dimensional antiferromagnetic Ising-like compound BaCo2V2O8 has been shown to be describable by the Tomonaga-Luttinger liquid theory in its gapless phase induced by a magnetic field applied along the Ising axis. Above 3.9 T, this leads to an exotic field-induced low-temperature magnetic order, made of a longitudinal incommensurate spin-density wave, stabilized by weak interchain interactions. By single-crystal neutron diffraction we explore the destabilization of this phase at a higher magnetic field. We evidence a transition at around 8.5 T towards a more conventional magnetic structure with antiferromagnetic components in the plane perpendicular to the magnetic field. The phase diagram boundaries and the nature of this second field-induced phase are discussed with respect to previous results obtained by means of nuclear magnetic resonance and electron spin resonance, and in the framework of the simple model based on the Tomonaga-Luttinger liquid theory, which obviously has to be refined in this complex system.Comment: 7 pages, 5 figure

Simplificación del tratamiento de muestra mediante el empleo de nanopartículas híbridas de magnetita y nanotubos de carbono en el capilar electroforético

II Encuentro sobre nanociencia y nanotecnología de investigadores y tecnólogos de la Universidad de Córdoba. NANOUC

Magnetic frustration in an iron based Cairo pentagonal lattice

The Fe3+ lattice in the Bi2Fe4O9 compound is found to materialize the first analogue of a magnetic pentagonal lattice. Due to its odd number of bonds per elemental brick, this lattice, subject to first neighbor antiferromagnetic interactions, is prone to geometric frustration. The Bi2Fe4O9 magnetic properties have been investigated by macroscopic magnetic measurements and neutron diffraction. The observed non-collinear magnetic arrangement is related to the one stabilized on a perfect tiling as obtained from a mean field analysis with direct space magnetic configurations calculations. The peculiarity of this structure arises from the complex connectivity of the pentagonal lattice, a novel feature compared to the well-known case of triangle-based lattices

Ventajas de los líquidos iónicos para la caracterización de nanotubos de carbono mediante miscroscopia de barrido con electrones

III Encuentro sobre Nanociencia y Nanotecnología de Investigadores y Tecnólogos Andaluce

Electrokinetic separation of non-steroidal antiinflamatory drugs by using graphene nanoparticles as pseudostationary phase

III Encuentro sobre Nanociencia y Nanotecnología de Investigadores y Tecnólogos Andaluce

Caracterización rápida de nanotubos de carbono mediante un espectrometro Ramana portátil

II Encuentro sobre nanociencia y nanotecnología de investigadores y tecnólogos de la Universidad de Córdoba. NANOUC