Temperature evolution of the magnetic properties of Ag/Fe nanodot arrays

Li, Xu; Alkadour, Bassel; Chuang, Wan-Chen; Markó, D.; Schmool, David S.; Wu, Jong-Ching; Manna, P. K.; Lin, Ko‐Wei; Lierop, J. van

doi:10.1016/j.apsusc.2020.145578

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…Samples of 50-nm-thick Co thin films were deposited on thermally oxidized silicon wafer substrates by ionbeam-assisted deposition [34]. During deposition, a Kaufmann ion source operating at 800 V and 7.5 mA was used to sputter the Co target.…”

Section: Methodsmentioning

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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Section: Methodsmentioning

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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“…Samples of 50-nm-thick Co thin films were deposited on thermally oxidized silicon wafer substrates by ionbeam-assisted deposition (IBAD) [30]. During deposition, a Kaufmann ion source operating at 800 V and 7.5 mA was used to sputter the Co target.…”

Section: Methodsmentioning

confidence: 99%

“…In this case, the resonance equation takes the same form as illustrated in Eq. (30). We can now rewrite this equation in the form:…”

Section: Field-and Frequency Dependence Of the Modesmentioning

confidence: 99%

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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“…Samples of 50 nm thick Co thin films were deposited on thermally oxidized silicon wafer substrates by Ion Beam Assisted Deposition (IBAD) [27]. During deposition, a Kaufmann ion source operating at 800 V and 7.5 mA was used to sputter the Co target.…”

Section: Co/ag Bilayers and Nanodotsmentioning

confidence: 99%

Ferromagnetic Resonance Studies in Magnetic Nanosystems

et al. 2021

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Ferromagnetic resonance is a powerful method for the study of all classes of magnetic materials. The experimental technique has been used for many decades and is based on the excitation of a magnetic spin system via a microwave (or rf) field. While earlier methods were based on the use of a microwave spectrometer, more recent developments have seen the widespread use of the vector network analyzer (VNA), which provides a more versatile measurement system at almost comparable sensitivity. While the former is based on a fixed frequency of excitation, the VNA enables frequency-dependent measurements, allowing more in-depth analysis. We have applied this technique to the study of nanostructured thin films or nanodots and coupled magnetic layer systems comprised of exchange-coupled ferromagnetic layers with in-plane and perpendicular magnetic anisotropies. In the first system, we have investigated the magnetization dynamics in Co/Ag bilayers and nanodots. In the second system, we have studied Permalloy (Ni80Fe20, hereafter Py) thin films coupled via an intervening Al layer of varying thickness to a NdCo film which has perpendicular magnetic anisotropy.

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Temperature evolution of the magnetic properties of Ag/Fe nanodot arrays

Cited by 6 publications

References 37 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

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

Ferromagnetic Resonance Studies in Magnetic Nanosystems

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