A5053336259- Physics of Superconductivity and Magnetism
- Iron-based superconductors research
- Gas Sensing Nanomaterials and Sensors
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- ZnO doping and properties
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal and Thin Film Mechanics
- Multiferroics and related materials
- Catalytic Processes in Materials Science
- Ferroelectric and Piezoelectric Materials
- Luminescence Properties of Advanced Materials
- Electronic and Structural Properties of Oxides
- Transition Metal Oxide Nanomaterials
- Corporate Taxation and Avoidance
- Semiconductor materials and devices
- Superconductivity in MgB2 and Alloys
- Magnetic and transport properties of perovskites and related materials
- High-Temperature Coating Behaviors
- Acoustic Wave Resonator Technologies
- GaN-based semiconductor devices and materials
- TiO2 Photocatalysis and Solar Cells
- Magneto-Optical Properties and Applications
- Magnetic Properties of Alloys
Center for Research and Advanced Studies of the National Polytechnic Institute
2013-2023
Instituto Politécnico Nacional
2009-2023
Tecnológico Nacional de México
2014
Centre National de la Recherche Scientifique
1998-2000
Centro de Investigación en Materiales Avanzados
1993-1995
Universidad del Centro de México
1994
Titania (TiO2) is employed as a host for the Eu3+ activator ion. Thin films were produced by sol-gel method on silicon and corning glass substrates and, depending nature of substrate, they present different crystalline structure. The show an intense red photoluminescence associated with D05→7F2 transition electronic structure Eu3+. presents better characteristics deposited wafers. For above band gap excitation emission from TiO2 matrix obscured luminescence ions. peak energy position,...
Here, we study some changes on the electronic band structure of anatase and rutile ${\text{TiO}}_{2}$ doped with Eu ions using first-principles calculations. This work presents a comparison GGA $\text{LDA}+\text{U}$ It was found that calculations show better agreement experimental data than From our series highly localized states in host matrix gap found. According to calculations, as it is widely known, these are mainly $\text{Eu}\text{ }4f$ character. However, contrary common idea orbitals...
We have reviewed the convenience and possibility of utilizing thallium-based superconductors for power applications. Some basic properties Tl-based systems such as crystal structure, phase stability, weak-links, pinning problems irreversibility lines are discussed first. Two approaches to conductor preparation then described, closed open one. Special attention is focused on fabrication Tl-1223 Tl-2223 superconductors. In case more successful approach a two-step technological procedure...
We present a detailed characterization of the vortex-glass transition in cubic $(\mathrm{K},\mathrm{B}\mathrm{a}){\mathrm{BiO}}_{3}$ superconductor (with critical temperature ${T}_{c}\ensuremath{\sim}30\mathrm{K}).$ Combining transport measurements down to $0.3\mathrm{K}$ and third-harmonic susceptibility close ${T}_{c}$ we show that field can be well fitted by power law: ${H}_{g}\ensuremath{\sim}(1\ensuremath{-}{T/T}_{c}{)}^{n}$ with $n\ensuremath{\sim}1.5$ over three magnetic decades. In...
A comparative study between micropowders and nanopowders of Y 3 Fe 5 O 12 (YIG) by means ferromagnetic resonance (FMR) is reported. Significant changes in lineshape the FMR spectra both samples are observed, particular, absorption mode have an internal structure which can be associated with magnetostatic modes. Additionally, a method to measure non-resonant microwave absorption, as function applied magnetic field around zero field, known low-field (LFMA) also employed. LFMA technique used...
In this work, supersymmetric quantum mechanics will be used to obtain complex solutions Painleve IV equation with real parameters. We also focus on the properties of associated Hamiltonians, i.e. algebraic structure, eigenfunctions and energy spectra.
The Bose-glass transition in the fully isotropic $(\mathrm{K},\mathrm{B}\mathrm{a}){\mathrm{BiO}}_{3}$ superconductor with columnar defects produced by irradiation 7.2 GeV Ta ions was studied transport and nonlinear susceptibility measurements. For fields smaller than dose equivalent field ${B}_{\ensuremath{\varphi}},$ line ${H}_{\mathrm{BG}}(T)$ shifts progressively upwards increasing dose,...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Jorge Zanelli; Introductory lectures on Chern-Simons theories. AIP Conf. Proc. 8 February 2012; 1420 (1): 11–23. https://doi.org/10.1063/1.3678608 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown Menu input auto suggest...
Metal-organic chemical vapor deposition (MOCVD) and post-deposition arsenic diffusion processes were successfully employed to grow superconducting NdFe0.88Co0.12AsO thin films. First, by employing iron, cobalt neodymium metal-organic precursors, a precursor film is grown MOCVD on (001)-oriented LaAlO3 substrates. Subsequently, the incorporated during an annealing of these films in presence NdFe0.9Co0.1AsO pellet. The composition crystallographic results indicate formation cobalt-doped...
When titanium dioxide films are deposited by delivering a liquid aerosol of titanium-n-butoxide or diisopropoxide, the crystalline and morphological features indicate that deposition takes place through an aerosol-assisted chemical-vapor (AA-CVD) process. However, state depends on precursor. The evidence AA-CVD is strongly supported quantitative study growth rate rg as function temperature. fitting experimental curves to equation ∼T3∕2exp(−EA∕RT) indicates film formation limited gas...
Iron-based '1111' polycrystalline superconducting thin films have been successfully grown on (100) LaAlO3 substrates by metal–organic chemical vapor deposition and an ex situ diffusion process. The viability of the method to grow NdFe1−xCoxAsO SmFeAsO1−xFx compounds is presented. x-ray diffraction, scanning electron microscopy electrical measurements show that formation quaternary phase possible this method. different behaviors resistance as a function temperature are explained discussed in...