Magnetically tunable SAW-resonator

Smole, P.; Ruile, W.; Korden, C.; Ludwig, Alfred; Quandt, Eckhard; Krassnitzer, S.; Pongratz, P.

doi:10.1109/freq.2003.1275210

Cited by 38 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our definition of d f /dH is analogue to the high frequency magnetoelectric coupling coefficient defined by Srinivasan and his coauthors, 4 except that f here means the center frequency of SAW instead of the ferromagnetic resonance frequency. In addition, a similar multilayer structure like Fig.1 has been reported in an early work by Smole et al 15 and recent work by Nan et al 16 However, due to much lower ∆E effect (∼30%) of Metglas in a thin film form, 17 relatively large magnetic…”

Section: Theoretical Modelsupporting

confidence: 77%

Theoretical investigation of magnetoelectric surface acoustic wave characteristics of ZnO/Metglas layered composite

Huang¹,

Lyu²,

Wen³

et al. 2016

AIP Advances

View full text Add to dashboard Cite

The surface acoustic wave properties of piezoelectric/magnetostrictive layered structures consisting of insulating ZnO and metallic Metglas with giant Δ E effect were studied based on a stable scattering matrix method. Only the first Rayleigh mode was found with phase velocity between 2200 m/s and 2650 m/s, and the maximum electro-mechanical coupling coefficient about 1%. It was found that the center frequency of ZnO/Metglas is highly sensitive on the change of magnetic field, up to 440 MHz/Oe. However, there is a cutoff Young’s modulus of Metglas for different designs of SAW, below which the Rayleigh mode will disappear. For a magnetoelectric SAW design with the center frequency of 335 MHz and covering a full magnetic field range from -1.4 to +1.4 Oe, the frequency sensitivity is 212 MHz/Oe, equivalent to a magnetic field sensitivity of 5 × 10−12 Tesla. Unlike conventional magnetoelectric bulk laminates or film stacks, the detection of frequency shift instead of electrical charge allows not only shrinkage of device volume but also a broad frequency band detection of weak magnetic field.

show abstract

Section: Theoretical Modelsupporting

confidence: 77%

Theoretical investigation of magnetoelectric surface acoustic wave characteristics of ZnO/Metglas layered composite

Huang¹,

Lyu²,

Wen³

et al. 2016

AIP Advances

View full text Add to dashboard Cite

show abstract

“…4 respectively are attributed to the ΔE effect, which is a change in Young's modulus E under magnetic fields, and to a dynamic magnetoelastic coupling, which is the interaction between acoustic waves and magnetic moments. Indeed, as described by P. Smole et al [22], applying an external field in hard axis direction leads primarily to a decrease in the elastic modulus towards a local minimum. A further increase of the external field causes a proportional growth of the elastic modulus up to a saturation value where the E modulus is approximately the same as in the initial state.…”

Section: Figmentioning

confidence: 89%

Magnetic field SAW sensors based on magnetostrictive-piezoelectric layered structures: FEM modeling and experimental validation

Elhosni

Elmazria

Petit-Watelot

et al. 2016

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

This study describes the numerical implementation of accurate and fully coupled physical models in order to investigate the sensitivity of Surface Acoustic Wave (SAW) devices using the magnetoelastic interaction with an external magnetic field. The model was first validated using experimental data previously published by Kadota et al., obtained with SAW resonators based on quartz substrates and nickel InterDigital Transducers (IDTs). The model was then used to optimize the geometry of a new magnetostrictive-piezoelectric layered structure (Ni/ZnO/IDT/LiNbO3), regarding its sensitivity to the magnetic field intensity. The optimized structure was designed and fabricated and experimental results show a good correlation with the numerical modeling. Simulations also show that if alumina is used instead of ZnO, the Ni/Al2O3/IDT/LiNbO3 structure exhibits a sensitivity that is 9 times higher than the one based on ZnO.

show abstract

“…SAW resonators with Ni interdigitated transducers (IDTs) were investigated by Kadota et al [24]. Kadota et al [24], Yamaguchi et al [25] and Smole et al [26] have also attempted to describe the physical phenomenon behind the sensor behaviour without any magnetic characterisation of the IDT. In our last report [27] we showed that the shape anisotropy induced in the magnetic IDT can reorient the easy axis of magnetization along the IDT length when the magnetic material is soft, limiting delta-E effects to geometries with applied fields along the acoustic wave propagation.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic versus shape anisotropy in micro-structured magnetostrictive thin films for magnetic surface acoustic wave sensors

Mishra

Hehn

Lacour

et al. 2019

Smart Mater. Struct.

View full text Add to dashboard Cite

This work aims at studying the interaction between surface acoustic waves (SAW) and microstructured magnetostrictive layers under a magnetic field with a perspective to develop magnetic field sensors. The impact of the competition between the strong intrinsic magnetic anisotropy of the magnetic material and the shape anisotropy of the interdigitated transducer (IDT) fingers introduced by the micro-structuration is investigated. Therefore, the macroscopic and microscopic magnetic properties of the IDT and their influence on the magneto-acoustic response are studied. A SAW resonator with the IDTs made of the magnetostrictive thin film was elaborated and the magnetic surface acoustic wave (MSAW) response under a magnetic field was performed and discussed. Depending on the energy balance, the anisotropy gets modified and a correlation with the MSAW sensitivity to an externally applied magnetic field is made.

show abstract

Magnetically tunable SAW-resonator

Cited by 38 publications

References 10 publications

Theoretical investigation of magnetoelectric surface acoustic wave characteristics of ZnO/Metglas layered composite

Theoretical investigation of magnetoelectric surface acoustic wave characteristics of ZnO/Metglas layered composite

Magnetic field SAW sensors based on magnetostrictive-piezoelectric layered structures: FEM modeling and experimental validation

Intrinsic versus shape anisotropy in micro-structured magnetostrictive thin films for magnetic surface acoustic wave sensors

Contact Info

Product

Resources

About