BackExaminar Artículos por departamento (eus.) "Materia kondentsatuaren fisika"
Now showing items 21-40 of 40
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Optical properties of metals: Infrared emissivity in the anomalous skin effect spectral region
Echániz Ariceta, Telmo
; ; (American Institute of Physics, 2014-09-07)
When the penetration depth of an electromagnetic wave in a metal is similar to the mean free path of the conduction electrons, the Drude classical theory is no longer satisfied and the skin effect becomes anomalous. Physical ... -
Optimized sample addressing in prism-coupled surface plasmon resonance experiments
Martínez Perdiguero, Jesús; Alonso Villanueva, Ibon (Elsevier, 2020-04-09)
In this work we study the walk-off of the beam from the interrogation spot during rotation in surface plasmon resonance experiments using prism-based coupling such as the widespread Kretschmann configuration. The impossibility ... -
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
; González Estévez, Julián María; Zhukov Egorova, Arkady Pavlovich ; Gawronski, Przemyslaw ; ; Corte León, Paula ; Blanco Aranguren, Juan María ; Zhukova Zhukova, Valentina (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 ... -
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 ... -
Spectral emissivity of copper and nickel in the mid-infrared range between 250 and 900 ºC
; Echániz Ariceta, Telmo; ; ; (Elsevier, 2014-01-15)
A study on the radiative properties of two pure metals, copper and nickel, using a high accuracy radiometer is carried out. Their spectral emissivity between 3 and 21 μm and its dependence on emission angle and temperature ... -
Strain Relaxation in Cu-Al-Ni Shape Memory Alloys Studied by in Situ Neutron Diffraction Experiments
; López Echarri, Ángel María; ; 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 ... -
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 ... -
The Influence of Thermal History on the Multistage Transformation of NiTi Shape-Memory Alloys
; 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 ... -
Thermal emissivity spectra and structural phase transitions of the eutectic Mg-51%Zn alloy: A candidate for thermal energy storage
Echániz Ariceta, Telmo; ; ; ; ; Rodríguez Aseguinolaza, Javier ; ; ; (Elsevier, 2016-11-05)
The thermal emissivity spectrum in the mid infrared range (3–21 μm) as well as its dependence on temperature between 225 and 320 °C has been obtained for the Mg-51%Zn (weight %) eutectic alloy, a candidate for thermal ... -
Thermal treatments and transformation behavior of Cu–Al–Be shape memory alloys
; ; ; ; ; San Juan Núñez, José María (Elsevier, 2013-11-15)
Among the different Cu-based shape memory alloys, the Cu–Al–Be family exhibits a particular technological interest for intermediate and low temperature applications. In this work we studied the martensitic transformation ... -
Thermo-radiative and optical properties of a cutting tool based on polycrystalline cubic boron nitride (PCBN)
; González de Arrieta Martinez, Iñigo; Echániz Ariceta, Telmo ; (IOP Publishing, 2016-04-27)
The normal spectral emissivity of a cutting tool based on polycrystalline cubic boron nitride (PCBN) between 400 °C and 1000 °C has been measured. Its shape shows significant differences with respect to that of pure cubic ... -
Ultrahigh Superelastic Damping at the Nano-Scale: a Robust Phenomenon to Improve Smart MEMS Devices
; Nó Sánchez, María Luisa; ; 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 ... -
Unconventional spin texture of a topologically nontrivial semimetal Sb(110)
Stróżecka, A.; Eiguren Goyenechea, Asier; Bianchi, M.; Guan, D.; Voetmann, C. H.; Bao, S.; Hofmann, Ph.; Pascual Chico, José Ignacio (IOP Publishing LTD, 2012-10-17)
The surfaces of antimony are characterized by the presence of spin-split states within the projected bulk band gap and the Fermi contour is thus expected to exhibit a spin texture. Using spin-resolved density functional ... -
Universal Scaling Law for the Size Effect on Superelasticity at the Nanoscale Promotes the Use of Shape‐Memory Alloys in Stretchable Devices
Fuster, Valeria; ; Nó Sánchez, María Luisa; San Juan Núñez, José María (Wiley, 2020-02)
Shape-memory alloys (SMAs) are the most stretchable metallic materials thanks to their superelastic behavior associated with the stress-induced martensitic transformation. This property makes SMAs of potential interest for ... -
Upgrading the Performance of Cholesteric Liquid Crystal Lasers: Improvement Margins and Limitations
Ortega Aperribay, Josu; Folcia Basa, César Luis ; Echevarría Ecenarro, Jesús (MDPI, 2017)
The topic of cholesteric-liquid-crystal lasers is a rapidly expanding research area in the field of soft-matter photonics. The increasing interest in this field is due to the high versatility that these lasers may possibly ... -
Water Adsorption on the β-Dicalcium Silicate Surface from DFT Simulations
Wang, Qianqian; Manzano Moro, Hegoi; López Arbeloa, Iñigo María; Shen, Xiaodong (MDPI, 2018-09-04)
beta-dicalcium silicate (beta-Ca2SiO4 or beta-C2S in cement chemistry notation) is one of the most important minerals in cement. An improvement of its hydration rate would be the key point for developing environmentally-friendly ...