Generation, manipulation, and sensing of magnetic domain walls are cornerstones in the design of efficient spintronic devices. Half‐metals are amenable for this purpose as large low field magnetoresistance signals can be expected from spin accumulation at spin textures. Among half metals, La1−xSrxMnO3 (LSMO) manganites are considered as promising candidates for their robust half‐metallic ground state, Curie temperature above room temperature (Tc = 360 K, for x = 1/3), and chemical stability. Yet domain wall magnetoresistance is poorly understood, with large discrepancies in the reported values and conflicting interpretation of experimental data due to the entanglement of various source of magnetoresistance, namely, spin accumulation, anisotropic magnetoresistance, and colossal magnetoresistance. In this work, the domain wall magnetoresistance is measured in LSMO cross‐shape nanowires with single‐domain walls nucleated across the current path. Magnetoresistance values above 10% are found to be originating at the spin accumulation caused by the mistracking effect of the spin texture of the domain wall by the conduction electrons. Fundamentally, this result shows the importance on non‐adiabatic processes at spin textures despite the strong Hund coupling to the localized t2g electrons of the manganite. These large magnetoresistance values are high enough for encoding and reading magnetic bits in future oxide spintronic sensors.
En este artículo hemos procedido al estudio de las distintas modistas al servicio de la reina María Luisa de Parma. Uno de los factores que tendrán una gran importancia en el Real Guardarropa de la soberana es la inserción de los primeros modistas, que no solo confeccionaban vestidos sino también accesorios textiles como cinturones, prendidos, bandas, bolsas, etc. Esta serie de creadoras no solo confeccionaban vestidos para la soberana, sino que son proveedoras de prendas y tejidos para la familia real. Entre las modistass más relevantes encontramos a Rose Bertin, siendo modista de la reina María Antonieta y de María Luisa, además de Maria Moulinier y Darguins, Ana Launay y el primer modista masculino, Joseph Martin, el cual primero realiza prendidos para la reina y posteriormente vestidos de corte. A través del trabajo de la documentación inédita consultada en los archivos, conocemos que las labores de las modistas, ya no se desarrollan en el anonimato, sino que sus trabajos comienzan a valorarse como una creación que revela gran inventiva y conocimientos matemáticos, de geometría y de costura. A partir del siglo XIX, la figura de modista estará completamente establecida como uno de los oficios más importantes en la industria textil.
The present investigation studies the main dresses of the queen, Marie Louise of Parma, valuing the evolution of the female costume. The main tailors and dressmakers of the sovereign will be studied, who not only made dresses, but were also in charge of creating the textile image of the queen. Along with the national fashion creators, there are foreigners, chosen for the exclusivity of their merchandise or for being the most outstanding professionals on an international scale. The Royal Wardrobe is the main stage, where the wife of Charles IV receives her orders of fabrics brought from different foreign countries, such as Paris and Buenos Aires. Through the inventories and invoices preserved in the Palacio General Archive in Madrid, we know that the work and creations of this series of artisans are no longer carried out in anonymity, but that their work begins to be valued as a creation that reveals a great inventiveness and knowledge of geometry, cutting and sewing.
Los mercaderes textiles de Isabel de Farnesio (1714-1746)The textile merchants of Elisabeth Farnese
El objetivo de este estudio es examinar el papel creador de la modista de la reina, Vicenta Mormin, la cual confecciono la apariencia de las soberanas: María Isabel de Braganza, María Josefa Amalia de Sajonia y María Cristina de Borbón. A través de sus inventarios, cuentas y expedientes personal conservado en el Archivo General de Palacio en Madrid, conocemos a nuestra protagonista, que ostentaba el cargo de «Modista y Batera de S.M. Reyna» en 23 de octubre de 1816 de la soberana Isabel de Braganza con el sueldo de 300 ducados anuales. En el presente trabajo se tratará de dar a conocer a esta artífice y a sus predecesoras en los últimos años de su trayectoria laboral.
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