Perpendicular Ferromagnetic-Resonance Equations Derived by Effective Demagnetizing Factors

Kohmoto, O.

doi:10.1143/jjap.42.7299

Cited by 6 publications

(6 citation statements)

References 16 publications

(17 reference statements)

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“…H eff is the effective magnetic field within the specimen , σ zz is the stress along the z -axis in the xy plane, which has an influence on the resonance peak and its linewidth. − H ⊥ 2 and H ⊥ 4 represent the secondary and fourth order of the perpendicular anisotropy field, respectively. H K1 and H K2 are the anisotropy fields ( H K1 = K 1 / M s , H K2 = K 2 / M s ) that mainly depend on the magnetocrystalline anisotropy. − It can be found in Figure a (for the transferred LSMO films) and Figure S8 (for the as-grown LSMO films) that the fitting results (shown as dashed curves) are in good agreement with the experimental results (shown as solid curves). According to the fitting curves, we obtained the H eff , H K1 , and H K2 , as listed in Table S1.…”

Section: Resultssupporting

confidence: 56%

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La_0.67Sr_0.33MnO₃ Thin Film

Wang¹,

Shen²,

Duan³

et al. 2019

ACS Appl. Mater. Interfaces

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High-quality flexible magnetic oxide thin films have promoted a wide range of potential applications in spintronic devices due to their unique physical properties. To obtain the optimized microwave magnetism for future all-oxide-based spintronic applications, high-quality oxide materials with excellent epitaxial quality as well as specific bending properties related to ferromagnetic resonance are high in demand. Here, (001)-oriented La0.67Sr0.33MnO3 epitaxial thin films with different thicknesses have been grown and subsequently transferred onto flexible poly(dimethylsiloxane) substrates. The microwave magnetisms of these film samples have been investigated under various bending states. Under bending, the ferromagnetic resonance lineshape of the film gradually transits from a single mode to a superposition of multimodes, possibly because of the uneven distribution of magnetization in the bending film at X-band. This phenomenon is more apparent when the direction of the applied magnetic field goes close to the out-of-plane of the film. Hence, an integration of invariable and continuous tuning of ferromagnetic resonance field under various mechanical bending can be achieved in one same sample by just tuning the direction of the applied magnetic field, which reveals that the flexible La0.67Sr0.33MnO3 thin films have huge potential in the applications in future flexible multifunctional devices.

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Section: Resultssupporting

confidence: 56%

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La_0.67Sr_0.33MnO₃ Thin Film

Wang¹,

Shen²,

Duan³

et al. 2019

ACS Appl. Mater. Interfaces

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“…H eff represents the effective field ( H eff = 4 πNM s ‐2 K u / M s ) that highly relates to the demagnetization field energy. H K 1 and H K 2 are the anisotropy fields ( H K 1 = K 1 / M s , H K 2 = K 2 / M s ) that mainly depend on the magnetocrystalline anisotropy . A 1 (θ M ), A 2 (θ M ), B 1 (θ M ), B 2 (θ M ), C 1 (θ M ), and C 2 (θ M ) are decided by the film orientations, as shown in Table S1 in the Supporting Information.…”

mentioning

confidence: 99%

A Strategy to Modulate the Bending Coupled Microwave Magnetism in Nanoscale Epitaxial Lithium Ferrite for Flexible Spintronic Devices

Shen

Lan

et al. 2018

Advanced Science

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With the development of flexible electronics, the mechanical flexibility of functional materials is becoming one of the most important factors that needs to be considered in materials selection. Recently, flexible epitaxial nanoscale magnetic materials have attracted increasing attention for flexible spintronics. However, the knowledge of the bending coupled dynamic magnetic properties is poor when integrating the materials in flexible devices, which calls for further quantitative analysis. Herein, a series of epitaxial LiFe5O8 (LFO) nanostructures are produced as research models, whose dynamic magnetic properties are characterized by ferromagnetic resonance (FMR) measurements. LFO films with different crystalline orientations are discussed to determine the influence from magnetocrystalline anisotropy. Moreover, LFO nanopillar arrays are grown on flexible substrates to reveal the contribution from the nanoscale morphology. It reveals that the bending tunability of the FMR spectra highly depends on the demagnetization field energy of the sample, which is decided by the magnetism and the shape factor in the nanostructure. Following this result, LFO film with high bending tunability of microwave magnetic properties, and LFO nanopillar arrays with stable properties under bending are obtained. This work shows guiding significances for the design of future flexible tunable/stable microwave magnetic devices.

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“…which is derived from the generalized ferromagnetic resonance equation [35,[43][44][45], and extending it for the ultrathin regime where the anisotropy 2K S /t FM becomes useful. .…”

Section: B Evolution Of Unique Nonuniform Modesmentioning

confidence: 99%

“…1(b) and 1(c). The principal mode along HA configuration can be seen in the functional form as [35,[43][44][45]:…”

Section: B Evolution Of Unique Nonuniform Modesmentioning

confidence: 99%

Confined spin-wave characteristics in magnetic nanowire ensembles approaching the ultrathin regime

Ghosh,

Talapatra,

Goolaup

et al. 2023

Phys. Rev. Applied

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We present a comprehensive study on the high-frequency magnetization dynamics of homogeneously patterned ultrathin magnetic nanowire arrays. The backward volume magnetostatic spin-wave (BVMSW) and Damon-Eshbach (DE) configurations are studied along with the intermediate transition states to understand the edge mode's evolution in depth. We find at the sub-10-nm ultrathin regime the dynamics are heavily influenced by geometrical parameters such as magnetic layer thickness (t FM ), demagnetization factors, and interfaces. Critical entities such as field separation δH between uniform to edge mode increase linearly with 1/t FM , while the edge saturation field H edge sat increase monotonically with increasing t FM , revealing excellent agreement between findings from experimental and micromagnetic simulations. The dynamics are less sensitive to the width of the nanowire but very sensitive to the adjacent material or the interface of the ferromagnet, especially at the ultrathin limits.

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Perpendicular Ferromagnetic-Resonance Equations Derived by Effective Demagnetizing Factors

Cited by 6 publications

References 16 publications

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La_0.67Sr_0.33MnO₃ Thin Film

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La_0.67Sr_0.33MnO₃ Thin Film

A Strategy to Modulate the Bending Coupled Microwave Magnetism in Nanoscale Epitaxial Lithium Ferrite for Flexible Spintronic Devices

Confined spin-wave characteristics in magnetic nanowire ensembles approaching the ultrathin regime

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Perpendicular Ferromagnetic-Resonance Equations Derived by Effective Demagnetizing Factors

Cited by 6 publications

References 16 publications

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La0.67Sr0.33MnO3 Thin Film

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La0.67Sr0.33MnO3 Thin Film

A Strategy to Modulate the Bending Coupled Microwave Magnetism in Nanoscale Epitaxial Lithium Ferrite for Flexible Spintronic Devices

Confined spin-wave characteristics in magnetic nanowire ensembles approaching the ultrathin regime

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Product

Resources

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Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La_0.67Sr_0.33MnO₃ Thin Film

Integration of Both Invariable and Tunable Microwave Magnetisms in a Single Flexible La_0.67Sr_0.33MnO₃ Thin Film