Layer-resolved vector magnetometry using generalized magneto-optical ellipsometry

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-07-09 DOI:10.1063/5.0209113

Carmen Martín Valderrama, Irene Prieto, Mikel Quintana, Ane Martínez-de-Guerenu, Andreas Berger

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引用次数: 0

Abstract

We demonstrate the ability of a single magneto-optical reflection experiment to achieve layer-resolved vector magnetometry in multilayer films. For this purpose, we designed, fabricated, and measured a set of epitaxial ferromagnetic/non-magnetic/ferromagnetic heterostructure multilayer samples that exhibit in-plane uniaxial anisotropy and a tunable ferromagnetic interlayer coupling strength through the non-magnetic interlayer. By means of generalized magneto-optical ellipsometry measurements, we obtain the magnetization angles of the two different ferromagnetic layers independently as a function of the applied field. Hereby, we observe that the magnetization switching of one layer can trigger a discontinuous shift of the magnetization angle in the second layer if ferromagnetic interlayer coupling is present. Moreover, we reproduce the obtained behavior using a model of two coupled macrospins, which corroborates even the unexpected aspects of our experimental results and thus reinforces the sensitivity and reliability of our experimental layer-resolved vector magnetometry.

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利用广义磁光椭偏仪进行层分辨矢量磁力测量

我们展示了在多层薄膜中通过单一磁光反射实验实现层分辨矢量磁力测量的能力。为此，我们设计、制造并测量了一组外延铁磁/非磁性/铁磁异质结构多层样品，这些样品表现出面内单轴各向异性以及通过非磁性夹层的可调铁磁夹层耦合强度。通过广义磁光椭偏仪测量，我们获得了两个不同铁磁层的磁化角与外加磁场的函数关系。由此，我们观察到，如果存在铁磁层间耦合，一层的磁化切换会引发第二层磁化角的不连续位移。此外，我们还利用两个耦合大自旋的模型重现了所获得的行为，这甚至证实了我们实验结果中意想不到的方面，从而加强了我们的实验层分辨矢量磁强计的灵敏度和可靠性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.

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