A5075745431- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Quantum and electron transport phenomena
- Metal complexes synthesis and properties
- Graphene research and applications
- Semiconductor Quantum Structures and Devices
- Climate change and permafrost
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Magnetism in coordination complexes
- Advancements in Semiconductor Devices and Circuit Design
- Physics of Superconductivity and Magnetism
- Earthquake Detection and Analysis
- Polar Research and Ecology
- Crystal structures of chemical compounds
- Crystallization and Solubility Studies
- Magnetic properties of thin films
- X-ray Diffraction in Crystallography
- Solar Radiation and Photovoltaics
- Semiconductor materials and devices
- Low-power high-performance VLSI design
- Synthesis and Characterization of Heterocyclic Compounds
- Arctic and Antarctic ice dynamics
Universidad de Alcalá
2014-2023
Instituto Nacional de Investigaciones Nucleares
2008-2015
Universidad del Valle
2011-2012
Instituto de Ciencia de Materiales de Madrid
1995-1999
Universidad de Granada
1992-1997
University of Almería
1997
Universidad de Sevilla
1994
Universidad de Zaragoza
1977-1978
University of Bern
1975-1978
ABSTRACT We present an analytical model to describe magnetic flux-rope topologies. When these structures are observed embedded in Interplanetary Coronal Mass Ejections (ICMEs) with a depressed proton temperature, they called Magnetic Clouds (MCs). Our extends the circular-cylindrical concept of Hidalgo et al. by introducing general form for radial dependence current density. This generalization provides information on force distribution inside flux rope addition usual parameters MC...
Abstract In this paper, we present the elliptic-cylindrical analytical flux rope model , which constitutes first level of complexity above that a circular-cylindrical geometry. The framework series models was established by Nieves-Chinchilla et al. with . describes magnetic topology distorted cross section as possible consequence interaction solar wind. model, for time, is completely described nonorthogonal Maxwell equations can be consistently solved using tensorial analysis, and relevant...
We present a new model for the topology of magnetic clouds at 1 AU that relates field vector with current density cloud without assuming force‐free condition. In addition, is formulated in such way it can be fitted directly to data need initially determining flux rope axis by minimum variance. The provides both strength and direction just one fitting procedure. addition orientation its relative closest‐approach distance between spacecraft axis, fit experimental allows an estimation plasma...
In this work we present an extension of a previous model for the topology magnetic clouds which takes into account their interaction with solar wind. The main consequence is possible distortion cross‐section, that need no longer be circular during propagation from Sun to 1AU. first approach deformation assume elliptical geometry cross section although consider cylindrical shape clouds. Once make assumptions uniform radial component plasma current density and null value field vector,...
Herein an approach is presented to determine the expansion and distortion of cross section magnetic clouds (MCs) in their evolution interplanetary medium. This approach, based on improvement our previous elliptical cross‐section model for topology MCs, gives analytical expressions which incorporate clouds. Our starting point assumption a spatially uniform j η , normal component plasma current density cloud. As it described text, this provides time dependency three components density. The...
Domain-wall scattering in a FePd-ordered alloy film with strong perpendicular magnetic anisotropy has been investigated using magnetoresistance measurements on whole hysteresis loop and as function of temperature. A correlation between the hysteretic behavior resistivity due to domain walls magnetization process is found. The data are well described by spin-dependent electron model. This study establishes that this phenomenon can be used identify directly reversal dynamics electronic...
We present an analytical approach to the global magnetic field topology of clouds (MCs) that considers them like close structures with torus geometry and a non-uniform (variable maximum radius) cross section along them. Following our previous problem MCs (Hidalgo 2003, 2011), we establish intrinsic coordinate system for topology, then analytically solve Maxwell equations in terms it. The purpose work is this model, which will lead us understand more realistic way physical mechanisms inside...
Abstract The 3D characterization of magnetic flux ropes observed in the heliosphere has been a challenging task for decades. This is mainly due to limitations on inferring global topology and physical properties from 1D time series any spacecraft. To advance our understanding whose configuration departs typical stiff geometries, here we present an analytical solution rope model with arbitrary cross section toroidal shape. constitutes next level complexity following elliptic-cylindrical (EC)...
The crystal structure of bright-red crystals the bidimensional polynuclear diamagnetic (µ-chloro)(µ-pyrazine)copper(I) complex has been analyzed from X-ray diffraction data. was solved by heavy-atom method. Full-matrix least-squares refinement based on 673 reflections with F > 4σ(F) converged to a final R = 0.043 and w 0.048. Crystals this are monoclinic, space group P2/c, 3.814(1), b 6.356(1) c 11.497(5) Å; β 96.04(2)°, Z 2. consists planes copper(I) atoms linked pyrazine Cl − bridges,...
The study of the thermal behavior permafrost and active layer on South Shetland Islands, in western side Antarctic Peninsula (Antarctica), has been our research topic since 1991, especially after 2006 when we established different thickness ground monitoring sites CALM GTN-P international networks International Permafrost Association. Along this period, snow cover did not change at those sites, but 2010, observed an elongation duration, with similar onset, a delay offset. Due to important...
Since 2006, our research team has been establishing in the islands of Livingston and Deception, (South Shetland archipelago, Antarctica) several monitoring stations active layer thickness within international network Circumpolar Active Layer Monitoring (CALM), ground thermal regime for Ground Terrestrial Network-Permafrost (GTN-P). Both networks were developed International Permafrost Association (IPA). In GTN-P stations, addition to temperature air, soil, terrain at different depths, snow...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn Effective Approach for Teaching Intermolecular InteractionsJuan Miguel Campanario , Enrique Bronchalo and Angel Hidalgo Cite this: J. Chem. Educ. 1994, 71, 9, 761Publication Date (Print):September 1, 1994Publication History Received3 August 2009Published online1 September 1994Published inissue 1 1994https://doi.org/10.1021/ed071p761Request reuse permissions Article Views320Altmetric-Citations28LEARN ABOUT THESE METRICSArticle Views are the...