Ferromagnetic Resonance Studies in Magnetic Nanosystems

Schmool, David S.; Markó, D.; Lin, Ko‐Wei; Hierro-Rodríguez, A.; Quirós, C.; Dı́az, J.; Álvarez-Prado, L. M.; Wu, Jong-Ching

doi:10.3390/magnetochemistry7090126

Cited by 6 publications

(5 citation statements)

References 30 publications

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“…FMR spectra for both the Co/Ag bilayer and nanostructured dots are shown [31]. For the bilayer system, we observe two clear resonance lines, which we interpret as the uniform mode and the first PSSW mode with p = 1.…”

Section: Continuous Filmmentioning

confidence: 80%

Interpretation of spin wave modes in Co/Ag nanodot arrays probed by broadband ferromagnetic resonance

Markó¹,

Cheenikundil²,

Bauer³

et al. 2022

Preprint

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Ferromagnetic resonance (FMR) and the measurement of magnetization dynamics in general have become sophisticated tools for the study of magnetic systems at the nanoscale. Nanosystems, such as the nanodots of this study, are technologically important structures, which find applications in a number of devices, such as magnetic storage and spintronic systems. In this work, we describe the detailed investigation of cobalt nanodots with a 200 nm diameter arranged in a square pitch array with a periodicity of 400 nm. Due to their size, such structures can support standing spinwave modes, which can have complex spectral responses. To interpret the experimentally measured broadband FMR, we are comparing the spectra of the nanoarray structure with the unpatterned film of identical thickness. This allows us to obtain the general magnetic properties of the system, such as the magnetization, g-factor and magnetic anisotropy. We then use state-of-the-art simulations of the dynamic response to identify the nature of the excitation modes. This allows us to assess the boundary conditions for the system. We then proceed to calculate the spectral response of our system, for which we obtained good agreement. Indeed, our procedure provides a high degree of confidence, since we have interpreted all the experimental data to a good degree of accuracy. In presenting this work, we provide a full description of the theoretical framework and its application to our system, and we also describe in detail the novel simulation method used.

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Section: Continuous Filmmentioning

confidence: 80%

Interpretation of spin wave modes in Co/Ag nanodot arrays probed by broadband ferromagnetic resonance

Markó¹,

Cheenikundil²,

Bauer³

et al. 2022

Preprint

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“…The details of FMR theory can be found in review articles [77,78,80]. Here, the principle of FMR is presented on an intuitive level and the discussion is focused on 2D magnets.…”

Section: Principle Of Ferromagnetic Resonancementioning

confidence: 99%

“…Ferromagnetic resonance (FMR) has been broadly applied to a range of materials from bulk magnets to nano-scale magnetic thin films. There are several excellent reviews on this technique [75][76][77][78][79][80]. Nowadays, the unique capabilities of FMR have been exploited to study 2D magnets.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Resonance in Two-dimensional van der Waals Magnets: A Probe for Spin Dynamics

Tang¹,

Alahmed²,

Mahdi³

et al. 2023

Preprint

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The discovery of atomic monolayer magnetic materials has stimulated intense research activities in the two-dimensional (2D) van der Waals (vdW) materials community. The field is growing rapidly and there has been a large class of 2D vdW magnetic compounds with unique properties, which provides an ideal platform to study magnetism in the atomically thin limit. In parallel, based on tunneling magnetoresistance and magneto-optical effect in 2D vdW magnets and their heterostructures, emerging concepts of spintronic and optoelectronic applications such as spin tunnel field-effect transistors and spin-filtering devices are explored. While the magnetic ground state has been extensively investigated, reliable characterization and control of spin dynamics play a crucial role in designing ultrafast spintronic devices. Ferromagnetic resonance (FMR) allows direct measurements of magnetic excitations, which provides insight into the key parameters of magnetic properties such as exchange interaction, magnetic anisotropy, gyromagnetic ratio, spin-orbit coupling, damping rate, and domain structure. In this review article, we present an overview of the essential progress in probing spin dynamics of 2D vdW magnets using FMR techniques. Given the dynamic nature of this field, we focus mainly on the broadband FMR, optical FMR, and spin-torque FMR, and their applications in studying prototypical 2D vdW magnets including CrX3 (X = Cl, Br, I), Fe5GeTe2, and Cr2Ge2Te6. We conclude with the recent advances in laboratory-and synchrotron-based FMR techniques and their opportunities to broaden the horizon of research pathways into atomically thin magnets.

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“…In Fig. 3, in-plane easy-axis VNA-FMR spectra for both the Co/Ag bilayer and nanostructured dots are shown [35].…”

Section: Continuous Filmmentioning

confidence: 99%

Interpretation of Spin-Wave Modes in Co / Ag Nanodot Arrays Probed by Broadband Ferromagnetic Resonance

Markó,

Cheenikundil,

Bauer

et al. 2023

Phys. Rev. Applied

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de

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Ferromagnetic Resonance Studies in Magnetic Nanosystems

Cited by 6 publications

References 30 publications

Interpretation of spin wave modes in Co/Ag nanodot arrays probed by broadband ferromagnetic resonance

Interpretation of spin wave modes in Co/Ag nanodot arrays probed by broadband ferromagnetic resonance

Ferromagnetic Resonance in Two-dimensional van der Waals Magnets: A Probe for Spin Dynamics

Interpretation of Spin-Wave Modes in Co / Ag Nanodot Arrays Probed by Broadband Ferromagnetic Resonance

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