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Urdiroz, UAuthorSanchez-Agudo, MAuthorCebollada, FAuthor

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February 15, 2021
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Local coercivity at X-ray nanobeam irradiated regions in amorphous Fe80B20 stripes

Publicated to: AIP Advances. 11 (1): 15318- - 2021-01-01 11(1), DOI: 10.1063/9.0000090

Authors:

Urdiroz, U; Navarro, E; Sánchez-Agudo, M; Cebollada, F; Palomares, FJ; Criado, GM; González, JM
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Affiliations

‎ AE Consejo Super Invest Cient CSIC, Inst Ciencia Mat Madrid ICMM, Madrid 28049, Spain - Author
‎ Univ Politecn Madrid, Escuela Tecn Super Ingenieros Telecomunicac, POEMMA CEMDATIC, Madrid 28040, Spain - Author

Abstract

We report on the effect, on the local magnetization reversal taking place in amorphous Fe80B20 stripes, of the irradiation with nanobeam synchrotron X-ray. That irradiation preserves the amorphous structure and results on the increase of the local coercivity with respect to that measured in a non-irradiated sample, in which the coercivity is mediated by the nucleation-propagation of a single wall. The local coercivity increases in a non-linear way with the width of the irradiated regions when that width is smaller than that of the wall mediating the magnetization switching in the non-irradiated stripe and gets saturated when the irradiated regions dimension is larger than the propagating wall width. We correlate this behavior with the induction at the irradiated regions of a reduction of the local effective anisotropy with respect to the stripe as-lithographed value. From the relationship between the coercivity and the width of the irradiated regions we estimate the local anisotropy reduction in a 25% of that measured in the non-irradiated stripe. (c) 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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Keywords

Amorphous structuresAnisotropyBoron compoundsCoercive forceEffective anisotropyInduced magnetic-anisotropyIron compoundsIrradiated samplesIrradiated stripesIrradiationLocal coercivityLocal magnetizationMagnetization reversalMagnetization switchingNanowiresResonanceSynchrotron x raysX rays

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal AIP Advances, and although the journal is classified in the quartile Q3 (Agencia WoS (JCR)), its regional focus and specialization in Physics, Applied, give it significant recognition in a specific niche of scientific knowledge at an international level.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-25:

  • WoS: 1
  • Scopus: 1
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-25:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 1 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/93937/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 21
  • Downloads: 7
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Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (URDIROZ URRICELQUI, UNAI) .

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Project objectives

Los objetivos perseguidos en esta aportación se centran en analizar el efecto de la irradiación con nanohaz de rayos X en la inversión local de la magnetización en tiras amorfas de Fe80B20; evaluar cómo dicha irradiación preserva la estructura amorfa y aumenta la coercitividad local en comparación con muestras no irradiadas; determinar la relación no lineal entre la coercitividad local y el ancho de las regiones irradiadas, especialmente cuando este es menor o mayor que el ancho de la pared de dominio que media el cambio de magnetización; caracterizar la reducción de la anisotropía efectiva local inducida por la irradiación en un 25% respecto al valor original; y correlacionar estos efectos con las propiedades magnéticas de las tiras tal como fueron litografiadas.
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Most relevant results

El estudio analiza el efecto de la irradiación con nanohaz de rayos X en la inversión local de la magnetización en franjas amorfas de Fe80B20. Los resultados más relevantes son: la irradiación mantiene la estructura amorfa y aumenta la coercitividad local respecto a muestras no irradiadas; la coercitividad local crece de forma no lineal con el ancho de las regiones irradiadas cuando este es menor que el ancho de la pared de dominio que media la inversión en la franja no irradiada; dicha coercitividad se satura al superar el ancho de la pared propagante; se observa una reducción local del 25% en la anisotropía efectiva inducida por la irradiación comparada con la anisotropía original de la franja.
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Awards linked to the item

This work has been developed with funds corresponding to project MAT2016-80394-R financed by the Spanish Research Agency (AEI) and 2019AEP150 by A.E. Consejo Superior de Investigaciones Cientificas (CSIC). We also acknowledge the Spanish Ministerio de Ciencia e Innovacion and Consejo Superior de Investigaciones Cientificas for financial support and for provision of synchrotron radiation at beamline BM25-SpLine (ESRF). U.U. acknowledges FPI grant BES-2014-070387.
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