BackExaminar por departamento (eus.) "Materia kondentsatuaren fisika"
Now showing items 21-40 of 44
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Ni–Ti-Hf High-Temperature Shape Memory Alloy: Measure of the Clausius-Clapeyron Coefficient Through Mechanical Spectroscopy
Pérez Cerrato, Mikel
; Maass, B.; Nó Sánchez, María Luisa; San Juan Núñez, José María (Elsevier, 2021-03-05)
The martensitic transformation of Ni49.5Ti35.5Hf15 high temperature shape memory alloy is characterized by internal friction measurements. The temperatures for the reversible B2 <-> B19' transformation appear in the range ... -
Position-dependent exact-exchange energy for slabs and semi-infinite jellium
Horowitz, Claudio M.; Constantin, Lucian A.; Proetto, C. R.; Pitarke de la Torre, José María (American Physical Society, 2009-12)
The position-dependent exact-exchange energy per particle epsilon(x)(z) (defined as the interaction between a given electron at z and its exact-exchange hole) at metal surfaces is investigated, by using either jellium slabs ... -
Reversible and Non-Reversible Transformation of Magnetic Structure in Amorphous Microwires
; ; ; Gawronski, Przemyslaw; Ipatov, Mihail ; ; Blanco Aranguren, Juan María; (MDPI, 2020-07-24)
We provide an overview of the tools directed to reversible and irreversible transformations of the magnetic structure of glass-covered microwires. The irreversible tools are the selection of the chemical composition, ... -
Role of occupied d bands in the dynamics of excited electrons and holes in Ag
; Pitarke de la Torre, José María; ; ; (American Physical Society, 2003)
The role that occupied d bands play in the inelastic lifetime of bulk and surface states in Ag is investigated from the knowledge of the quasiparticle self-energy. In the case of bulk electrons, sp bands are taken to be ... -
Role of occupied d states in the relaxation of hot electrons in Au
Campillo Santos, Igor; Pitarke de la Torre, José María; Rubio, A.; Echenique Landiribar, Pedro Miguel (American Physical Society, 2000-07-15)
We present first-principles calculations of electron-electron scattering rates of low-energy electrons in Au. Our full band-structure calculations indicate that a major contribution from occupied d states participating in ... -
Simetría magnética aplicada al estudio de materiales magnéticos: nuevos programas del Bilbao Crystallographic Server
(2017-12-01)En esta tesis doctoral ha consistido en un estudio de la simetría magnética y de los grupos espaciales y superespaciales magnéticos desde un punto de vista práctico, orientado al desarrollo de herramientas teóricas que ... -
Sistema de compensación simplificado del desvío semicircular para bitácora con compás de clase 'A'
Arribalzaga Aurre, Josu (2016-03-18)
Nuevo sistema de compensación para agujas náuticas tipo 'A' destinado a sustituir al convencional constituido por: barra Flinders, esferas, imán de escora e imanes correctores longitudinales y transversales. Debido a que ... -
Spectral and optical properties of Ag3Au(Se2,Te2) and dark matterdetection
(IOP, 2020-01-01)Paper • The following article is Open access Spectral and optical properties of Ag3Au(Se2,Te2) and dark matter detection M-Á Sánchez-Martínez6,1 , I Robredo6,2,3, A Bidaurrazaga3, A Bergara2,3,4, F de Juan2,5, A G ... -
Spin-dependent and non-adiabatic phenomena related to the electron-phonon interaction in nanostructures with strong relativistic corrections.
(2020-04-03)En esta tesis se estudian fenómenos no adiabáticos y dependientes del espín del electrón relacionados conla interacción electrón-fonón en nanoestructuras con fuertes correcciones relativistas. Se han realizadocálculos de ... -
Spin-to-charge current conversion in systems with spin-orbit coupling
(2019-07-09)This thesis is based on the experimental study of spin-to-charge current conversion (SCC) phenomena that occur in systems with spin-orbit coupling: spin Hall effect (SHE) and anomalous Hall effect (AHE). The main objective ... -
Strain Relaxation in Cu-Al-Ni Shape Memory Alloys Studied by in Situ Neutron Diffraction Experiments
Ruiz Larrea, María Isabel; López Echarri, Ángel María; Gómez Cortés, José Fernando ; Nó Sánchez, María Luisa; Brown, Donald W.; Balogh, Levente; Breczewski Filberek, Tomasz; San Juan Núñez, José María (American Institute of Physics, 2019-02-28)
In situ neutron diffraction is used to study the strain relaxation on a single crystal and other powdered Cu-Al-Ni shape memory alloys (SMAs) around martensitic transformation temperatures. This work is focused on the ... -
Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys
López Ferreño, Iñaki; Breczewski Filberek, Tomasz; López, Gabriel Alejandro; Nó Sánchez, María Luisa; San Juan Núñez, José María (Pergamon-Elsevier, 2016-11)
Cu-Al-based shape memory alloys are firm candidates to be used up to 473 K. The main limiting aspect is the activation of diffusion processes in the metastable austenite phase, which drive the alloy decomposition. In the ... -
Study of Li metal anode surface. interaction with atmospheric gases and impact of impurities in electrochemistry
(2020-05-19)La ganancia de cuota del mercado de vehículos eléctricos es esencial si se pretenden mitigar las consecuencias del efecto invernadero causadas, entre otros factores, por las emisiones de gases de vehículos de motor térmico. ... -
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Studying the influence of substitutional elements on mechanical behavior of Alloy 718
Max, Bertrand; San Juan Núñez, José María; Nó Sánchez, María Luisa; Cloué, Jean-Marc; Viguier, Bernard; Andrieu, Eric (EDP Sciences, 2014)
In nickel-based superalloys, substitutional solute species have a strong impact on in service mechanical properties as well as on oxidation and corrosion resistances. In alloy 718, recent studies carried out by tensile ... -
Surfaces and interfaces in thin-film and conventional li-ion batteries
(2019-10-22)En esta tesis doctoral titulada "Surfaces and Interfaces in Thin-Film and Conventional Li-ion Batteries" se presentan los resultados del trabajo experimental realizado en relación a materiales del estado del arte en baterías ... -
The aperiodic nature of mullite
Klar, Paul Benjamin (2018-11-30)
Different methods were applied to investigate the vacancy and Al/Si order in mullite. At first the symmetry was analysed thoroughly to derive constraints on the vacancy distribution based on crystal chemical premises. On ... -
The Influence of Thermal History on the Multistage Transformation of NiTi Shape-Memory Alloys
Ruiz Larrea, María Isabel; López Echarri, Ángel María; Breczewski Filberek, Tomasz; López, Gabriel Alejandro ; López Ferreño, Iñaki; Nó Sánchez, María Luisa; San Juan Núñez, José María (MDPI, 2018-04)
The multistage martensitic phase transformation of a polycrystalline NiTi shape-memory alloy (50.3 at. %Ni-49.7 at. % Ti) has been studied by means of calorimetric measurements. After a conventional thermal treatment ... -
Ti-Al intermetallics for aerospace applications: atomic relaxation processes,microstructure and mechanical properties at high temperature.
(2018-05-04)El presente trabajo de investigación se encuadra en la línea de "Materiales Intermetálicos para Altas Temperaturas" que se desarrolla en el Grupo de investigación en MetalurgiaFísica (GIMF) de los Dptos de Física de la ... -
Ultrahigh Superelastic Damping at the Nano-Scale: a Robust Phenomenon to Improve Smart MEMS Devices
Gómez Cortés, José Fernando; Nó Sánchez, María Luisa; Ruiz Larrea, María Isabel ; Breczewski Filberek, Tomasz; López Echarri, Ángel María; Schuh, Christopher A.; San Juan Núñez, José María (Elsevier, 2019-03)
Micro and nano pillars of Copper-based shape memory alloys (SMAs) with feature sizes between about 2 mu m and 250 nm are known to exhibit ultra-high mechanical damping due to the nucleation and motion of stress-induced ...