Cyclopentylmagnesium Bromide

Hiebel, Marie‐Aude

doi:10.1002/047084289x.rn01235

Cited by 2 publications

(2 citation statements)

References 32 publications

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“…The SAW transmission of our delay line device was measured by using a vector network analyzer. Based on the low propagation velocity of the SAW, a time-domain gating technique was employed to exclude spurious signals, in particular, electromagnetic crosstalk. We use the relative change of the background-corrected SAW transmission signal normalΔ S i j ( μ 0 H ) = Mag ( S i j false( μ 0 H false) ) − Mag ( S i j false( 600 .25em normalm normalT false) ) to characterize SAW-SW coupling (IL 0 =–Mag( S ij (600 mT))).…”

Section: Methodsmentioning

confidence: 99%

Giant Surface Acoustic Wave Nonreciprocity with Low Magnetoacoustic Insertion Loss in CoFeB/Ru/CoFeB Synthetic Antiferromagnets

Küß,

Glamsch,

Kunz

et al. 2023

ACS Appl. Electron. Mater.

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In this study, we optimize the nonreciprocal transmission of surface acoustic waves (SAWs) in a piezoelectric/ magnetic heterostructure loaded with a CoFeB(d A )/Ru(0.55 nm)/ CoFeB(d B ) synthetic antiferromagnet (SAF). The SAF is composed of two ferromagnetic layers separated by a thin nonmagnetic Ru spacer layer, providing strong antiferromagnetic interlayer exchange coupling. The optical spin wave (SW) mode shows a large nonreciprocal dispersion relation in conjunction with a narrow line width. Therefore, for oppositely propagating SAWs, the SAW-SW resonances can become fully separated. For the optimized CoFeB(16 nm)/Ru(0.55 nm)/CoFeB(5 nm) SAF, we demonstrate both, a giant nonreciprocal SAW transmission of ΔS ± /l f > 250 dB/mm and a very low magnetoacoustic insertion loss of IL Δ /l f < 1 dB/mm per length l f of the SAF in the acoustic path at frequencies above 5 GHz. These results yield the potential for the realization of novel microwave devices with nonreciprocal signal transmission, such as acoustic isolators. In addition, the experimental results are in excellent agreement with a phenomenological model that considers the dipolar fields of the SWs and takes the bilinear and biquadratic interlayer exchange coupling into account.

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Section: Methodsmentioning

confidence: 99%

Giant Surface Acoustic Wave Nonreciprocity with Low Magnetoacoustic Insertion Loss in CoFeB/Ru/CoFeB Synthetic Antiferromagnets

Küß,

Glamsch,

Kunz

et al. 2023

ACS Appl. Electron. Mater.

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“…The SAW transmission of our delay line device was measured with a vector network analyzer. Based on the low propagation velocity of the SAW, a time-domain gating technique was employed to exclude spurious signals, in particular, electromagnetic cross-talk. We use the relative change of the background-corrected SAW transmission signal normalΔ S i j ( μ 0 H , ϕ H , f ) = Mag [ S i j false( μ 0 H , ϕ H , f false) ] − Mag [ S i j false( 400 .25em mT , ϕ H , f false) ] to characterize the magnetic field-dependent SAW–SW coupling at a magnetic field direction ϕ H and SAW excitation frequency f .…”

Section: Experimental Sectionmentioning

confidence: 99%

Wide-Band Nonreciprocal Transmission of Surface Acoustic Waves in Synthetic Antiferromagnets

Küß,

Glamsch,

Hörner

et al. 2024

ACS Appl. Electron. Mater.

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The coupling between surface acoustic waves (SAWs) and spin waves (SWs) in piezoelectric/magnetic heterostructures holds potential for the realization of novel microwave devices. Since SAWs are inherently reciprocal, the nonreciprocity arising from magnetoacoustic interaction is of particular interest. Large nonreciprocal SAW transmission in a limited frequency range near the intersection point of the SAW and SW dispersions has been recently reported in several studies. Here, we demonstrate that the nonreciprocal SW dispersion of a CoFeB(16 nm)/Ru(0.55 nm)/CoFeB(14 nm) synthetic antiferromagnet (SAF) can be adjusted to match the linear dispersion of the SAW in a wide range of frequencies f. Therefore, the SAW transmission is nonreciprocal for 2.8 GHz < f < 7.0 GHz with low losses (<0.08 dB) mediated by SAW-SW interaction in the forward direction and large attenuation (>5 dB) in the reverse direction. These results hold great potential for the realization of devices allowing wide-band nonreciprocal signal transmission.

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Cyclopentylmagnesium Bromide

Cited by 2 publications

References 32 publications

Giant Surface Acoustic Wave Nonreciprocity with Low Magnetoacoustic Insertion Loss in CoFeB/Ru/CoFeB Synthetic Antiferromagnets

Giant Surface Acoustic Wave Nonreciprocity with Low Magnetoacoustic Insertion Loss in CoFeB/Ru/CoFeB Synthetic Antiferromagnets

Wide-Band Nonreciprocal Transmission of Surface Acoustic Waves in Synthetic Antiferromagnets

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