Persona: Sanz, Ruy
Dirección de correo electrónico
Fecha de nacimiento
Proyectos de investigación
Unidades organizativas
Instituto Nacional de Técnica Aeroespacial
El Instituto Nacional de Técnica Aeroespacial es el Organismo Público de Investigación (OPI) dependiente del Ministerio de Defensa. Además de realizar actividades de investigación científica y de desarrollo de sistemas y prototipos en su ámbito de conocimiento, presta servicios tecnológicos a empresas, universidades e instituciones.
El INTA está especializado en la investigación y el desarrollo tecnológico, de carácter dual, en los ámbitos de la Aeronáutica, Espacio, Hidrodinámica, Seguridad y Defensa.
Puesto de trabajo
Apellidos
Sanz
Nombre de pila
Ruy
Nombre
18 resultados
Resultados de la búsqueda
Mostrando 1 - 10 de 18
Publicación Acceso Abierto Doble línea microstrip para extracción de permitividad a temperaturas extremas(URSI, 2025-09) Cublier Martínez, Aymar; Auñón Marugán, Alicia; Ramos Somolinos, David; Sanz, Ruy; Plaza Gallardo, Borja; Poyatos Martinez, David[en] Many cryogenic missions for space observation have been launched in the past. In all of them, it was key to insulate the observation devices from thermal and electromagnetic perturbations. A solid understanding of materials and signal propagation is therefore essential to achieve full spectral isolation for cryogenic systems. This work introduces a non-resonant electromagnetic characterization method to extract permittivity and loss in dielectric materials at extreme temperatures. The authors design, simulate and validate a double microstrip transmission line and implement a flexible extraction method to measure permittivity over a wide frequency range, using materials such as CuClad 250, ROGERS 4350B and FR-4. Albeit refinements to the extraction process and comparison with real measurements in a cryogenic setting are possible, the resulting system is shown to be consistent and reliable across all simulations.Publicación Acceso Abierto Gamma Irradiation of Magnetoresistive Sensors for Planetary Exploration(Multidisciplinary Digital Publishing Institute (MDPI), 2012-04-02) Sanz, Ruy; Fernández, A. B.; Domínguez, J. A.; Martín Vodopivec, B.; Díaz Michelena, MarinaA limited number of Anisotropic Magnetoresistive (AMR) commercial-off-the-shelf (COTS) magnetic sensors of the HMC series by Honeywell, with and without integrated front-end electronics, were irradiated with gamma rays up to a total irradiation dose of 200 krad (Si), following the ESCC Basic Specification No. 22900. Due to the magnetic cleanliness required for these tests a special set-up was designed and successfully employed. Several parameters of the sensors were monitored during testing and the results are reported in this paper. The authors conclude that AMR sensors without front-end electronics seem to be robust against radiation doses of up to 200 krad (Si) with a dose rate of 5 krad (Si)/hour and up to a resolution of tens of nT, but sensors with an integrated front-end seem to be more vulnerable to radiation.Publicación Restringido Magnetic study of Cobalt three dimensional nanonetworks: First Order Reversal Curves, hysteresis loops and first magnetization curves(Institute of Electrical and Electronics Engineers, 2023-05-19) Ruiz Clavijo, Alejandra ; Caballero Calero, Olga; Navas, David; Martín-Rubio, Carolina; Sanz, Ruy; Martín González, MarisolThree-Dimensional (3D) magnetic nanostructures will be the next generation of functional magnetic nanostructured metamaterials. In this work, we report some of our recent results on the synthesis and characterization of different interconnected Co nanowires forming a dense and ordered magnetic system: Co 3D Nanowire Networks (3DNN). The 3DNN presents anisotropic magnetic responses. We used first magnetization curves, hysteresis loops, and first order reversal curves techniques to characterize the systems, which provide information about the key magnetic properties of the 3D nanostructure.Publicación Acceso Abierto Magnetoelastic Anisotropy Drives Localized Magnetization Reversal in 3D Nanowire Networks(Royal Society of Chemistry, 2025-01) Vivas, Laura G.; Ruiz Clavijo, Alejandra ; Caballero Calero, Olga; Navas, David; Ordoñez Cencerrado, Amanda A.; Manzano, Cristina V.; Sanz, Ruy; Martín-González, Marisol; Agencia Estatal de Investigación (España)Three-dimensional magnetic nanowire networks (3DNNs) have shown promise for applications beyond those of their linear counterparts. However, understanding the underlying magnetization reversal mechanisms has been limited. In this study, we present a combined experimental and computational investigation on simplified 3DNNs to address this gap. Our findings reveal a previously unidentified in-plane magnetoelastic anisotropy, validated through comparisons between experimental and simulated magnetic data. Notably, we discovered that magnetization reversal in 3DNNs is driven by highly localized magnetic states, arising from the interplay of exchange and dipolar interactions, magnetoelastic anisotropy, and nanowire microstructure. This discovery challenges the prevailing understanding of magnetization reversal in nickel nanowires. Our work provides critical insights into the magnetic behavior of 3DNNs, opening doors for their tailored design and optimization.Publicación Restringido Caracterización electromagnética de materiales aeroespaciales a temperaturas extremas(RIA-MAD4SPACE 2025, 2025-04) Cublier Martínez, Aymar; Auñón Marugán, Alicia; Ramos Somolinos, David; Sanz, Ruy; Plaza Gallardo, Borja; Poyatos Martinez, DavidEl uso de materiales compuestos y de impresión 3D ha generado avances significativos en la industria aeroespacial. Su óptima relación resistencia-peso ha supuesto un gran avance. Sin embargo, los gradientes extremos de temperatura presentes en el espacio plantean nuevos retos y requieren estudios detallados de su rendimiento. Este trabajo propone un sistema de caracterización electromagnética no resonante basado en doble línea microstrip para la caracterización electromagnética a temperatura (de -55ºC a 80ºC) en un amplio rango de frecuencia (40 MHz – 8 GHz). Mediante simulaciones y medidas a temperatura ambiente se validan los métodos de extracción de la permitividad y la tangente de pérdidas de los materiales estudiados (FR-4, ROGERS 4350B, y CuClad-250). Posteriormente, las medidas a temperatura se realizan en el interior de la cámara térmica “Osa Menor” del INTA. Los resultados muestran la robustez y fiabilidad del sistema de medidas, así como de los métodos de extracción. Una vez validado el modelo y analizado sus limitaciones se está trabajando en el diseño de un sistema más complejo que mejore la precisión y estabilidad de los resultados.Publicación Restringido Magnetic interactions in ordered cobalt three-dimensional nanonetworks(EMS, 2023-08-27) Ruiz Clavijo, Alejandra ; Caballero Calero, Olga; Navas, David; Vivas, Laura G.; Martín-Rubio, Carolina; Sanz, Ruy; Martín González, Marisol ; Agencia Estatal de Investigación (AEI)"Three-Dimensional (3D) magnetic nanostructures allow the generation and control of new effects able to give rise to the next generation of functional magnetic nanostructured metamaterials and devices[1]. This work reports the results on the synthesis and characterization of different interconnected Co nanowires forming a dense and ordered magnetic system: Co 3D Nanowire Networks (3DNN). These nanostructures were synthesized by the electrodeposition of Co in 3D ordered porous alumina templates [2] [3] [4]. The route allows to control the order and some geometric features compared to other synthesis approaches [1]. The resulting 3DNN consists of hexagonal ordered nanowires with an inter-wire distance of 65 nm and 50 nm in diameter. These nanowires are interconnected with a net of perpendicular or transversal nanowires (TNW) of ≈ 30 nm in diameter. Meanwhile the TNW are distributed in levels with a well defined distance between them of 550 nm. The magnetic characterization consisted in hysteresis loops, first magnetization curves and first order reversal curves (FORC) at 0º (in-plane, IP) 30º, 60º and 90º (out of plane, OOP) from perpendicular NW main axis. 1.D. Bhattacharya, et al. Nano Lett. (2022), 22, 24, 10010–10017. 2.J. Martín, et. al., Nat. Commun. 5, (2014) 5130. 3.A. Ruiz-Clavijo, et al. Phys. Status Solidi RRL, 13 (2019), 1900263. 4.A. Ruiz-Clavijo, et al., Adv. Electron. Mater. 8, (2022) 2200342"Publicación Acceso Abierto Asymmetrical magnetization processes induced by compositional gradients in ferromagnetic nanowires(Elsevier, 2024-01-16) Fernández González, Claudia; Berja, Alba; Álvaro Gómez, Laura; Martín-Rubio, Carolina; Mascaraque, Arantzazu; Aballe, Lucía; Sanz, Ruy; Pérez, L.; Ruiz Gómez, Sandra; Centros de Excelencia Severo Ochoa, INSTITUTO MADRILEÑO DE ESTUDIOS AVANZADOS EN NANOCIENCIA, SEV-2016-0686Electrodeposited nanowires are an excellent scenario to study and control magnetic domain wall motion in nanostructures. In particular, the introduction of local changes in composition during the growth procedure has been proven to be very efficient for controlling the magnetization dynamics. In this work, we show the possibility of introducing compositional gradients in FeNi electrodeposited nanowires by gradually changing the Fe/Ni ratio along their axis. These compositional gradients produce an asymmetrical landscape for domain wall motion which is reflected in asymmetrical magnetization processes under an applied magnetic field. By studying nanowires with different compositional gradients we were able to correlate composition and magnetic asymmetry. Our results pave the way towards full control of the movement of domain walls along the nanowires.Publicación Restringido Progress on magnetic 3D nanowire networks for space technology(IEEE Nanotechnology Council, 2024-08-07) Vivas, Laura; Ruiz Clavijo, Alejandra ; Caballero Calero, Olga; Navas, David; Sanz, Ruy; Martín González, MarisolPublicación Acceso Abierto Mars MOURA magnetometer demonstration for high-resolution mapping on terrestrial analogues(European Geoscience Union (EGU), 2016-05-19) Díaz Michelena, Marina; Kilian, R.; Sanz, Ruy; Ríos, F.; Baeza, O.; Ministerio de Economía y Competitividad (MINECO)Satellite-based magnetic measurements of Mars indicate complex and very strong magnetic anomalies, which led to an intensive and long-lasting discussion about their possible origin. To make some progress in the investigation of the origin of these anomalies the MOURA vector magnetometer was developed for in situ measurements on Mars. In this work we propose the utilisation of such an instrument for future planetary on-ground surveys. The proof of its suitability is seen through testing it on various terrestrial analogues characterised by the distinct magnetic anomalies of their basement rocks: (1) a magnetite body of EL Laco (up to +110 000 nT) and its transition to surrounding andesites ( < +2000 nT) in the northern Andes of Chile showing the highest local magnetic anomalies. The magnetite-bearing ore body has highly variable local anomalies due to its complex formation history where a significant dispersion in palaeo-orientations has been previously reported, while our vector data show relatively uniform and probably induced declinations. (2) A basaltic spatter cone of the Pali Aike volcanic field, in southern Chile, was characterised by very strong magnetic anomalies along the crater rim (up to +12 000 nT), controlled by the amount of single domain magnetites in the ground mass of the basalts. Due to their strong remanent signature, palaeo-declinations of the lavas and reorientations of collapsed blocks could be constrained by the vector data. (3) The Monturaqui meteorite crater (350 m diameter), in northern Chile, shows significant variations of its anomalies (from −2000 to > +6000 nT) in restricted areas of several square metres along its crater rim related to unexposed iron-bearing fragments of the impactor while its granitic and ignimbritic target rocks exhibit only very weak anomalies. (4) An area with several amphibolitic dykes, which cross-cut a Cretaceous granitoid in the southernmost Andes, where a decimetre-scale mapping was performed. In this case, pyrrhotite is the only magnetic carrier. It was formed during hydrothermal processes within the dykes. Very low (+40 to +120 nT) positive magnetic anomalies clearly depict the amount of 1–4 vol % pyrrhotite in these dykes, which is important as a mineralogical indicator as well as to detect associated gold and copper enrichment.Publicación Restringido Nanostructured metamaterials for the thermal and electromagnetic isolation of cryostats(SPIE, 2024-08-26) Vivas, Laura G.; Ramos Somolinos, David; Martín-Rubio, Carolina; Rivelles García, Alejandro; Madueño Custodio, Laura; Ruiz Clavijo, Alejandra ; Díaz, Alberto; Schneider, Marc; Plaza Gallardo, Borja; Poyatos Martinez, David; del Hoyo Gordillo, Juan Carlos; Caballero Calero, Olga; Worgull, M.; Martín Iglesias, Santiago; Martín Vodopivec, B.; Maicas, M.; Navas, David; Martín González, Marisol ; Sanz, RuyIn terms of thermal and electromagnetic isolation properties, Nanostructured Metamaterials may present important advantages compared to current employed materials. In this work, we present the synthesis routes and the preliminary characterization results of some metamaterials based on Poly-ether-ether-ketone and nanostructured anodic oxides, with low thermal conductivity, combined with Au nanocolumns and three-dimensional nanonetworks. The results reveals proper magnetic and electromagnetic properties and suggest their suitable use under vacuum and cryogenic conditions.
