10
                GHz
           bandstop microstrip filter using excitation of magnetostatic surface wave in a patterned Ni78Fe22 ferromagnetic film

Vroubel, M.; Zhuang, Yan; Rejaei, B.; Burghartz, Joachim N.

doi:10.1063/1.2172893

Cited by 4 publications

(5 citation statements)

References 14 publications

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“…Dynamically developing applications, in the fields of wireless communication and information technology, require advanced magnetic materials operating at microwave frequencies [1][2][3][4]. Technology of conventional magnetic microwave materials with complex structures, such as: spinels, hexaferrites or garnets, cannot be easily integrated with current silicone technology of electronic circuits.…”

Section: Introductionmentioning

confidence: 99%

Magnetostatic Interactions of Two-Dimensional Arrays of Magnetic Strips

Małkiński

Scherer

2010

MRS Proc.

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A series of arrays consisting of Permalloy stripes with dimensions of 100 nm x 300 nm x 1500 nm were fabricated using electron beam nanolithography and magnetron sputtering followed by the lift-off process. In order to elucidate the effect of magnetostatic interactions among nanosized stripes on magnetic properties of the arrays, the separation between the stripes in different arrays was varied in the range between 100 nm and 2000 nm. Magnetic hysteresis loops of the arrays were measured using SQUID magnetometer for different orientations of the applied field with respect to the arrays. Magnetic anisotropy of the arrays was determined based on ferromagnetic resonance measurements at 9.8 GHz using EPR spectrometer. The measurements were carried out for different directions of the in-plane magnetic bias filed. The angular dependence of the resonance field of the main resonant peak indicated presence of the uniaxial magnetic anisotropy due to elongated shape of the stripes. Comparison between angular curves of resonant fields for different arrays leads to the conclusion that increasing strength of magnetostatic interactions among the stripes leads to a suppression of the uniaxial anisotropy. The stripes separated by 2000 nm behave almost like non-interacting objects, but the effect of interactions becomes particularly significant for separations smaller than 600 nm. The properties of the arrays with the smallest separations resembled those of continuous films. Magnetostatic modes have been observed in the FMR spectra in addition to the main resonant peak. These modes are believed to result from dimensional confinement of lateral spinwaves in the magnetic stripes. No such modes were observed in the reference samples of solid Py films, with the in-plane applied magnetic field.

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Section: Introductionmentioning

confidence: 99%

Magnetostatic Interactions of Two-Dimensional Arrays of Magnetic Strips

Małkiński

Scherer

2010

MRS Proc.

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“…With the rapid proliferation of high speed electronics and microwave technologies, there are great interests in the development of soft magnetic thin films with high permeability at high frequency. Some examples of applications for such thin films include miniaturized magnetic field amplifying components [1][2][3] and absorber materials used for electromagnetic noise control and suppression [2,[4][5][6][7][8]. As the permeability along the hard axis of uniaxial soft magnetic thin film can be very high at the ferromagnetic resonance frequency f FMR , much research efforts have been placed on the control of the f FMR , such as by application of stress [9] or magnetic field [6,10], variation of compositions and preparation parameters to fabricate samples with suitable crystalline and micro-structure [3,[11][12][13][14][15][16] or post-deposition treatments.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic resonance frequency tuning of FeTaN thin films by strips patterning with angular displacements

Tan¹,

Chen²,

G³

et al. 2007

J. Phys. D: Appl. Phys.

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FeTaN thin films with uniaxial anisotropy were fabricated by sputtering and patterned into strips with width of 21 µm, separation gap of 10 µm and angular displacement of 0° to 90° from the magnetic easy axis of the unpatterned films. The effective magnetic anisotropy field was effectively modified in both value and direction dependent on the displacement angle. The unpatterned thin films had a maximum permeability of μ′∼700, μ″∼1000 and a ferromagnetic resonance frequency of ∼1.1 GHz. After patterning, the ferromagnetic resonance frequency was found to be ranging from 1 to 1.8 GHz as the angular displacement was varied, indicating that this method is a viable way of tuning the ferromagnetic resonance frequency. These results were well explained according to the well-known Kittel's formula assuming two fold anisotropies in the patterned films.

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“…If so, a shorted waveguide cavity (SWC) could be an alternative. This kind of cavity is just a section of waveguide sealed by a metal plate at one end [16] as show in Fig.4. Since metallic wave guide are commercially standard with wide range of frequency from L to W band, it is worth to obtain FMR information at different bands with this cheap, simple and effective method.…”

Section: Shorted Waveguide Cavitymentioning

confidence: 99%

“…Microstrip (MS) and co-planar waveguide (CPW) which are indeed transmission lines, are commonly used to extract FMR at broad frequency range [16,17,18,19]. Sample is mounted on top of their signal lines, and -wave is conducted into MS (CPW) via Port 1 of the VNA, and the differential change in either reflected or transmitted signal is analyzed.…”

Section: Microstrip and Co-planar Waveguidementioning

confidence: 99%

Instrumentation for Ferromagnetic Resonance Spectrometer

Lo¹

2013

Ferromagnetic Resonance - Theory and Applications

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10 GHz bandstop microstrip filter using excitation of magnetostatic surface wave in a patterned Ni78Fe22 ferromagnetic film

Cited by 4 publications

References 14 publications

Magnetostatic Interactions of Two-Dimensional Arrays of Magnetic Strips

Magnetostatic Interactions of Two-Dimensional Arrays of Magnetic Strips

Ferromagnetic resonance frequency tuning of FeTaN thin films by strips patterning with angular displacements

Instrumentation for Ferromagnetic Resonance Spectrometer

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