Results 41 to 50 of about 3,947 (205)

Scattering of Microwaves by a Passive Array Antenna Based on Amorphous Ferromagnetic Microwires for Wireless Sensors with Biomedical Applications

Sensors, 2019
Co-based amorphous microwires presenting the giant magnetoimpedance effect are proposed as sensing elements for high sensitivity biosensors. In this work we report an experimental method for contactless detection of stress, temperature, and liquid ...
Alberto Moya, Diego Archilla, Elena Navarro, Antonio Hernando, Pilar Marín   +4 more
doaj   +1 more source

Decomposition of the Methylene Blue Dye Using Layered Manganese Oxide Materials Synthesized by Solid State Reactions

International Journal of Chemical Engineering, Volume 2018, Issue 1, 2018., 2018
The modulation in the synthesis parameters of layered manganese oxides allowed us to produce materials with different AC conductivities. These conductivities were correlated with the catalytic performance of the materials in the decomposition of methylene blue, as a model of electron transfer reactions.
M. E. Becerra, A. M. Suarez, N. P. Arias, O. Giraldo, Donald L. Feke   +4 more
wiley   +1 more source

Assim na Terra como no céu: a teoria do dínamo como uma ponte entre o geomagnetismo e o magnetismo estelar

Revista Brasileira de Ensino de Física
Esse trabalho pretende, através de uma abordagem didática, apresentar a íntima ligação entre o magnetismo estelar e o geomagnetismo, ressaltando a importância da teoria de dínamo na compreensão do magnetismo no universo.
Osman Rosso Nelson, José Renan De Medeiros   +1 more
doaj   +1 more source

Synthesis of FeNi Alloy Nanomaterials by Proteic Sol‐Gel Method: Crystallographic, Morphological, and Magnetic Properties

Journal of Nanomaterials, Volume 2016, Issue 1, 2016., 2016
Proteic Sol‐Gel method was used for the synthesis of FeNi alloy at different temperature conditions and flow reduction. The solids were characterized by XRD, H2‐TPR, SEM, TEM, Mössbauer spectroscopy, and VSM. It was observed by X‐ray diffraction pure FeNi alloy in the samples reduced at 600°C (40 mL/min H2 flow) and 700°C (25 mL/min H2 flow).
Cássio Morilla dos Santos, Adanny Filipe Nogueira Martins, Bruna Carolina Costa, Thiago Soares Ribeiro, Tiago Pinheiro Braga, João Maria Soares, José Marcos Sasaki, Edward A. Payzant   +7 more
wiley   +1 more source

La aguja de Hans Christian Ørsted

Epistemología e Historia de la Ciencia, 2022
El presente escrito da un panorama acerca de la electricidad y el magnetismo al terminar el siglo XVIII y al iniciar el siglo XIX, contexto en el cual, se tiene la invención de la pila de Alessandro Volta, y el desarrollo de la experiencia de la aguja ...
Rodrigo Andrés Bautista Rincón
doaj   +2 more sources

Robust Directional Analysis of Magnetic Microscopy Images Using Non‐Linear Inversion and Iterative Euler Deconvolution

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract In paleomagnetism, bulk measurements of entire samples have traditionally been used to characterize remanent magnetization. While effective, this approach provides only a general directional estimate and cannot resolve spatial variability or magnetization at the grain scale.
Gelson F. Souza‐Junior, Leonardo Uieda, Ricardo I. F. Trindade, Roger R. Fu, Ualisson D. Bellon, Yago M. Castro   +5 more
wiley   +1 more source

Influence of Nanocrystalline Structure on the Magnetic Properties of Wires and Microwires

Texture, Stress, and Microstructure, Volume 32, Issue 1-4, Page 245-267, 1999., 1997
The determining factors of the outstanding magnetic properties of the so‐called nanocrystalline materials are described. The discussion is based on results performed on wires and microwire materials with general composition FeSiB(CuNb) and obtained by different rapid solidification techniques.
M. Vázquez, P. Marin, J. Arcas, A. Hernando, A. P. Zhukov, J. González   +5 more
wiley   +1 more source

Inducción Magnética

, 2023
Aprenderemos sobre uno de los conceptos más importantes y deslumbrantes del magnetismo propuesto por Michael Faraday.Abarcamos conceptos, desde la electricidad hasta el magnetismo , para darle una aplicación en el concepto de inducción magnética.1.
Mendoza Rodríguez, Estefania
core  

Interplay Between Structure and Interfacial Interactions in Fe‐Gd Synthetic Ferrimagnets

Advanced Electronic Materials, Volume 12, Issue 4, 18 February 2026.
Synthetic ferrimagnets with nearly identical Gd–Fe compositions but different architectures and crystallinity were investigated by element‐resolved microscopy, structural analysis and atomistic spin simulations. The results show that Curie temperature and domain evolution are governed primarily by structural order and interface quality, demonstrating ...
Álvaro González‐García, Alejandro Álvarez‐Chico, Jairo Obando‐Guevara, Silvia Gallego, Unai Atxitia, Iulia Cojocariu, Matteo Jugovac, Tevfik Onur Menteş, Andrea Locatelli, Arantzazu Mascaraque, Miguel Ángel González‐Barrio   +10 more
wiley   +1 more source

Influence of Various Heat Treatments on Giant Magnetoimpedance Effect in Nanocrystalline FeSiBNbCu Ribbons

Texture, Stress, and Microstructure, Volume 32, Issue 1-4, Page 269-279, 1999., 1997
In this paper we present studies on the frequency dependence of the magneto‐impedance in the range of 0.1–2 MHz for Fe73.5Si13.5B9Nb3Cu1 and Fe73.5Si16.5B6Nb3Cu1 nanocrystalline ribbons, which differ in the sign of the magnetostriction constant. As cast samples were annealed in Ar atmosphere at 560℃, with and without an DC and AC magnetic field.
G. V. Kurlyandskaya, M. Vázquez, E. H.C.P. Sinnecker, A. P. Zhukov, J. P. Sinnecker, A. Hernando, M. El Ghannami   +6 more
wiley   +1 more source