A two-port surface acoustic wave (SAW) device was developed to be used for the control and excitation via spin waves (SWs). The structure was manufactured using advanced nanolithography techniques, on GaN/Si, enabling fundamental Rayleigh interdigitated transducer (IDT) resonances in the GHz frequency range. The ferromagnetic resonance (FMR) of the magnetostrictive Ni/NiFeSi layer placed between the IDTs of the SAW device can be tuned to the SAW resonance frequency by magnetic fields. Using structures with finger and interdigit spacing of 170 and 100 nm, fundamental Rayleigh IDT resonance frequencies of 6.4 and 10.4 GHz have been obtained. Coupling of SAW to SW was demonstrated through transmission measurements at the fundamental Rayleigh frequencies in a magnetic field, H from -280 to +280 mT, at different angles ( between the SAW propagation direction and the magnetic field direction. For the 6.4-GHz resonator, a maximum decrease of about 1.2 dB occurred in S , at H =30 mT and at . Time-gated processing of the frequency domain (FD) raw data was used to remove the direct electromagnetic crosstalk and triple transit effects. Nonreciprocity associated with the coupling was analyzed for the two SAW structures. The quantitative influence of the magnetic field strength on the phase of the transmission parameters is also presented.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/TUFFC.2024.3463731 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Backscattering-free edge states below all bands in two-dimensional auxetic media.
Nat Commun
March 2025
Department of Physics, University of Michigan, Ann Arbor, MI, USA.
Unidirectional and backscattering-free propagation of sound waves is of fundamental interest in physics and highly sought-after in engineering. Current strategies utilize topologically protected chiral edge modes in bandgaps, or complex mechanisms involving active constituents or nonlinearity. Here we propose passive, linear, one-way edge states based on spin-momentum locking of Rayleigh waves in two-dimensional media in the limit of vanishing bulk to shear modulus ratio, which provides perfect unidirectional and backscattering-free edge propagation that is immune to any edge roughness and has no limitation on its frequency (instead of residing in gaps between bulk bands).
View Article and Find Full Text PDFSemi-analytical dynamic modeling and impact mechanism analysis of a hard-coating cylindrical shell with arbitrary circular perforations.
Sci Rep
March 2025
School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan, 114051, China.
In this paper, an innovative axial domain decomposition method, which uniquely integrates axial and circumferential perforation parameters, is developed for semi-analytical modeling of free vibration of a hard-coating cylindrical shell with arbitrary axial and circumferential perforations, based on the Love's first-order shear deformation theory and Rayleigh-Ritz method. The concept of this method is to decompose the shell into two types of domains at the upper and lower axial boundaries of the circular perforations. The generalized semi-analytical formulas of the perforated composite shell can be derived by assembling the separated energy expressions of each domain.
View Article and Find Full Text PDFReconfiguring Surface Acoustic Wave Microfluidics via In Situ Control of Elastic Wave Polarization.
Phys Rev Lett
January 2025
University of Colorado, Paul M. Rady Department of Mechanical Engineering, Boulder, Colorado 80309, USA.
We demonstrate in situ control of the elastic wave polarization in a surface acoustic wave (SAW). It allows us to create highly reconfigurable SAW microfluidics that can be switched on demand between the acoustohydrodynamic (AHD) regime and electrohydrodynamic (EHD) regime for manipulating particles and cells. The control of wave polarization comes from our experimental and theoretical identification of an unexpected shear-horizontal (SH) wave mode in a conventional Rayleigh (R) wave design, which is stereotyped to excite only vertically polarized Rayleigh SAWs.
View Article and Find Full Text PDFProperty Tuning in N-Methylpyrrole Azo-Photoswitches via Modification of the Peripheral Substituents.
Chemistry
March 2025
Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice, 53210, Czech Republic.
Differently substituted pyrrole-azo-benzene molecular photoswitches were prepared in a straightforward synthetic way. Their fundamental properties were investigated by XRD analysis, differential scanning calorimetry, thermogravimetric analysis, cyclic voltammetry, UV-Vis absorption spectroscopy, Hyper-Rayleigh Scattering, and NMR spectroscopy; the experimental results were further corroborated by DFT calculations. Thermal robustness, the HOMO/LUMO levels, and the absorption properties were altered mostly by substituting the N-methylpyrrole moiety and further fine-tuned by modifying the benzene substituents.
View Article and Find Full Text PDFThe Environmental Light Characteristics of Forest Under Different Logging Regimes.
Ecol Evol
December 2024
Conservation Ecology Research Unit, Department of Zoology and Entomology University of Pretoria Pretoria South Africa.
Light is a fundamental attribute and key abiotic driver in forest ecosystems. Although the ecological effects of light itself is well studied, capturing the complex parameters that constitute the whole light environment remain an intricate research endeavor. Here, we apply the newly introduced environmental light field (ELF) technique in Kibale National Park, Uganda.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!