Microwave characterization of magnetic thin films

Nader, Chadi; Boudiar, T.; Bayard, Bernard; Siblini, Ali; Noyel, G.

doi:10.1002/pssc.200405546

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Yttrium iron garnet thin films have been chosen to be used for their integration in the microwave passive components 6–10. So, it is very important to determine their initial magnetic permeability.…”

Section: Methodsmentioning

confidence: 99%

“…Yttrium iron garnet (YIG) materials are of great interest in magneto‐optical and microwave communication industries due to their low dielectric loss, high resistivity (2.5 × 10 6 Ω m) and narrow absorption line width in the X‐band frequency range (8–12 GHz). These materials have been used in microwave circuits like resonators, isolators, and circulators 6–11. Recently, YIG films have been found to exhibit a large magneto‐optical effect and low propagation loss, which are good to be used in devices with higher quality, optical current sensors or optical magnetic field sensors 12–14.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the multilayer morphology (alumina/Cu/YIG/Cu) to characterize YIG thin film

Khalil

Siblini

Chatelon

et al. 2011

Physica Status Solidi (a)

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International audienceThe aim of our study is to characterize yttrium iron garnet (YIG) thin film for its applications in the microwaves and magnetooptical domains. For this purpose, we have manufactured a microinductor by deposition of YIG film between two copper layers on an alumina substrate. Multilayers have been deposited by radio-frequency magnetron sputtering technique. Thin films of YIG are amorphous after deposition; a post-thermal annealing at 740 8C for 2 h is necessary to obtain satisfactory magnetic properties. In this work, we have studied the effects of different parameters concerning the substrate surface state, deposition and post-thermal treatment of YIG and copper thin films on their structure and morphological properties. We have come against several mechanical and electrical problems: crack formation, detachment of YIG or Cu films from the substrate, deterioration of Cu films, open or short circuits. The roughness of alumina substrate and the annealing mode play an important role on the quality of themicroinductor prototype. After several tests by varying different parameters, we have established a protocol permitting to manufacture a prototype of good quality. This prototype is characterized using: profilometry, scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry, and a precision LCR meter

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of the multilayer morphology (alumina/Cu/YIG/Cu) to characterize YIG thin film

Khalil

Siblini

Chatelon

et al. 2011

Physica Status Solidi (a)

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“…They have been used for the developments of magnetic devices, such as thin film inductors and transformers [1][2][3]. These materials have been used in microwave circuits like resonators, isolators and circulators [4][5][6]. Magnetic and dielectric characterization at low and high frequency ranges are essential for the development of these previous applications.…”

Section: Introductionmentioning

confidence: 99%

Determination of Initial Magnetic Permeability of YIG Thin Films Using the Current Sheet Method

Siblini¹,

Khalil²,

Chatelon³

et al. 2011

AMR

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Abstract. A new technique of inductive measure to determine the initial magnetic permeability (r) of Yttrium Iron Garnet (YIG) thin films has been conceived and developed in our laboratory. The magnetic material is deposited by radio-frequency sputtering between two copper thin layers on alumina substrate. Because the as-deposited films are amorphous and non magnetic, thermal annealing is necessary to make the films crystallize and to obtain satisfactory magnetic properties. After different tests considering the geometrical, morphological and magnetic properties, we have established a protocol permitting to manufacture a prototype in an original design. The performance of the fabricated micro-inductor has been checked using a physical-chemistry characterization. To obtain accurate measurements, we have used a four-point probe test bench and a precision LCR meter. The current sheet method has been validated with thick layers of commercial YIG. The results obtained for thick and thin films of YIG have been compared to the simulation and theoretical ones. Several tests, made for different thickness and different number of loops, have permitted us to evaluate the magnetic permeability of YIG thin films to 32 ± 4.

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Photo-induced SHG as a sensitive tool for the detection of surface morphology for iron garnet derivative films deposited on GGG substrates

Ebothé¹,

Nzoghe-Mendome²,

Kityk

et al. 2007

Materials Letters

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Microwave characterization of magnetic thin films

Cited by 3 publications

References 4 publications

Improvement of the multilayer morphology (alumina/Cu/YIG/Cu) to characterize YIG thin film

Improvement of the multilayer morphology (alumina/Cu/YIG/Cu) to characterize YIG thin film

Determination of Initial Magnetic Permeability of YIG Thin Films Using the Current Sheet Method

Photo-induced SHG as a sensitive tool for the detection of surface morphology for iron garnet derivative films deposited on GGG substrates

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