Cut-off frequency of magnetostrictive materials based on permeability spectra

Meng, Hao; Zhang, Tianli; Jiang, Chengbao

doi:10.1016/j.jmmm.2012.01.024

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…The size, volume fraction and crystallographic orientation [80,81] of Tb-Dy-Fe alloy particles, as well as the bond strength [82] between the matrix and particles, will affect the magnetostrictive properties of the composite. After compounding, the eddy current was greatly reduced [83], which was conducive to the improvement of dynamic properties, and the mechanical properties were also greatly improved. The main characteristics of GMPCs of several Tb-Dy-Fe systems reported in the literature are summarized in Table 1.…”

Section: Progress On Tb-dy-fe Giant Magnetostrictive Composites 61 Po...mentioning

confidence: 99%

Recent Advances in Magnetostrictive Tb-Dy-Fe Alloys

Yang

Zhou

et al. 2022

Metals

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As giant magnetostrictive materials with low magnetocrystalline anisotropy, Tb-Dy-Fe alloys are widely used in transducers, actuators and sensors due to the effective conversion between magnetic energy and mechanical energy (or acoustic energy). However, the intrinsic brittleness of intermetallic compounds leads to their poor machinability and makes them prone to fracture, which limits their practical applications. Recently, the addition of a fourth element to Tb-Dy-Fe alloys, such as Ho, Pr, Co, Nb, Cu and Ti, has been studied to improve their magnetostrictive and mechanical properties. This review starts with a brief introduction to the characteristics of Tb-Dy-Fe alloys and then focuses on the research progress in recent years. First, studies on the crystal growth mechanism in directional solidification, process improvement by introducing a strong magnetic field and the effects of substitute elements are described. Then, meaningful progress in mechanical properties, composite materials, the structural origin of magnetostriction based on ferromagnetic MPB theory and sensor applications are summarized. Furthermore, sintered composite materials based on the reconstruction of the grain boundary phase also provide new ideas for the development of magnetostrictive materials with excellent comprehensive properties, including high magnetostriction, high mechanical properties, high corrosion resistance and high resistivity. Finally, future prospects are presented. This review will be helpful for the design of novel magnetostrictive Tb-Dy-Fe alloys, the improvement of magnetostrictive and mechanical properties and the understanding of magnetostriction mechanisms.

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Section: Progress On Tb-dy-fe Giant Magnetostrictive Composites 61 Po...mentioning

confidence: 99%

Recent Advances in Magnetostrictive Tb-Dy-Fe Alloys

Yang

Zhou

et al. 2022

Metals

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“…[1][2][3] To meet the requirements of magnetic microwave devices used in different frequency ranges, it is necessary to adjust the cut-off frequency of magnetic material. The cut-off frequency of magnetic film is determined by the frequency of ferromagnetic resonance (FMR) [4] caused by the uniform precession of magnetic moment. [5] The FMR mode frequency f uni of magnetic film can be given by the Kittel's equation with f uni = (γ/2π) H(H + 4πM S ), [6] where H represents an effective magnetic field including the external field and the anisotropy field, γ and M S are the gyromagnetic ratio and the saturation magnetization, respectively.…”

Section: Introductionmentioning

confidence: 99%

Angular control of multi-mode resonance frequencies in obliquely deposited CoZr thin films with rotatable stripe domains*

Li¹,

Jiang²,

Chai³

2021

Chinese Phys. B

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We investigate the angular-dependent multi-mode resonance frequencies in CoZr magnetic thin films with a rotatable stripe domain structure. A variable range of multi-mode resonance frequencies from 1.86 GHz to 4.80 GHz is achieved by pre-magnetizing the CoZr films along different azimuth directions, which can be ascribed to the competition between the uniaxial anisotropy caused by the oblique deposition and the rotatable anisotropy induced by the rotatable stripe domain. Furthermore, the regulating range of resonance frequency for the CoZr film can be adjusted by changing the oblique deposition angle. Our results might be beneficial for the applications of magnetic thin films in microwave devices.

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Investigation of Some Magnetic and Thermal Properties of $$\hbox {Epoxy/Ni}_{0.5}\hbox {Zn}_{0.5}\hbox {Fe}_{2}\hbox {O}_{4}$$ Epoxy/Ni 0.5 Zn 0.5 Fe 2 O 4 Composites

Abosheiasha

Saafan

2015

Int J Thermophys

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Nanoparticles of Ni 0.5 Zn 0.5 Fe 2 O 4 have been prepared by the coprecipitation method, and X-ray diffraction analysis has confirmed the formation of the desired ferrite. A pure epoxy sample and three samples of epoxy/Ni 0.5 Zn 0.5 Fe 2 O 4 composites have also been prepared with different ferrite percentages. These samples have been characterized by Fourier transform infrared spectroscopy. The magnetization of the composites has been investigated by using a vibrating sample magnetometer and has revealed that these composites may be promising candidates for electromagnetic interference suppression. Moreover, the thermal diffusivity and thermal effusivity of epoxy and composite samples have been measured by using the photoacoustic technique, where a high enhancement of the thermal diffusivity with increasing ferrite content has been observed which can be attributed to the higher number of phonon vibrational modes as well as the longer mean free path of the ferrite nanoparticles due to their crystalline structure as compared to the amorphous structure of epoxy. Moreover, the formation of a percolated network of NiZn ferrite nanoparticles inside the epoxy may enhance the phonon conduction, increasing the value of the thermal diffusivity in the bulk of the samples. On the other hand, the almost constant values of the thermal effusivity-which is a surface property-suggest that these composites may be used not only for electromagnetic interference suppression but also for thermal shielding in electronic circuits.

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Cut-off frequency of magnetostrictive materials based on permeability spectra

Cited by 6 publications

References 19 publications

Recent Advances in Magnetostrictive Tb-Dy-Fe Alloys

Recent Advances in Magnetostrictive Tb-Dy-Fe Alloys

Angular control of multi-mode resonance frequencies in obliquely deposited CoZr thin films with rotatable stripe domains*

Investigation of Some Magnetic and Thermal Properties of $$\hbox {Epoxy/Ni}_{0.5}\hbox {Zn}_{0.5}\hbox {Fe}_{2}\hbox {O}_{4}$$ Epoxy/Ni 0.5 Zn 0.5 Fe 2 O 4 Composites

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