Influence of Substrate Stage Temperature and Rotation Rate on the Magneto-Optical Quality of RF-Sputtered Bi2.1Dy0.9Fe3.9Ga1.1O12 Garnet Thin Films

Nur-E-Alam, Mohammad; Vasiliev, Mikhail; Alameh, Kamal

doi:10.3390/app8030456

Cited by 5 publications

(8 citation statements)

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“…synthesizing the garnet-oxides composites, applying post-deposition oxygen plasma treatment, and garnet layers deposited using different substrate stage rotation rates (rpm). , improved optical and MO properties observed in oxygen plasma treated garnet films, and the garnet layers deposited using various substrate stage rotation rates (rpm) [13,37,33,38].…”

Section: Resultsmentioning

confidence: 99%

“…The variations in RF sputtering process parameters (substrate stage temperature and rotation rate) influence the properties (films' stoichiometry and MO quality through variations in both the specific Faraday rotation and the optical absorption coefficients) of garnet films. From this study we concluded that the MO characteristics can be tuned and optimized for use in various magnetic field-driven nano-photonics and integrated optics devices with an addition of a flexible and cost-effective approach for the design and development of new, high-quality, and application-specific MO materials for various photonics and integrated-optics applications [38].…”

Section: Investigation Of Deposition Process Parameter Effects On Gar...mentioning

confidence: 94%

“…The best obtained specific Faraday rotation of garnet films (Bi2Dy1Fe4Ga1O12), presented with the measured specific Faraday rotation data points achieved in Bi2Dy1Fe4.3Ga0.7O12 garnet films and the best performing garnet-Bi2O3 composite films (a), measured MO quality factor in terms of the figure of merit of typical Bi1.8Lu1.2Fe3.6Al1.4O12 garnet layer and deposited at 250 °C and 680 °C substrate temperature and several best annealed composite Bi1.8Lu1.2Fe3.6Al1.4O12: (4.5 vol. % Bi2O3 ) films (b), improved optical and MO properties observed in oxygen plasma treated garnet films, and the garnet layers deposited using various substrate stage rotation rates (rpm)[13,37,33,38].…”

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confidence: 99%

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Bi-substituted Ferrite Garnet Type Magneto-Optic Materials Studied at ESRI Nano-Fabrication Laboratories, ECU, Australia

Nur-E-Alam¹,

Vasiliev²,

Alameh³

2022

Preprint

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Since 2007, at the Electron Science Research Institute (ESRI) nano-fabrication laboratories, Edith Cowan University, Australia, we have devoted research efforts to the synthesis and characterization of bismuth-containing ferrite-garnet-type thin-film magneto-optic (MO) materials of different compositions. We report on the development and properties of highly bismuth-substituted iron-garnet thin films prepared by using radio frequency (RF) magnetron sputtering. We study the process parameters associated with the RF magnetron sputter deposition technique and investigate the results of optimizing process parameters and implementing several special techniques including the fabrication of co-sputtered nanocomposite films, all-garnet multilayer structures, applying oxygen plasma treatment on amorphous garnet layers just after the deposition process, and designing modifications of the annealing crystallization process and regimes for achieving the best MO properties. We demonstrated significant improvement in MO properties of Bi-containing ferrite-type garnet thin-film materials, including record-high MO figures of merit and improved conventional and un-conventional hysteresis loops of Faraday rotation. The attractive optical, magnetic, and magneto-optic properties obtained in highly bismuth-substituted iron garnet thin-film materials of multiple composition types are relevant in the context of manufacturing next-generation ultra-fast optoelectronic devices, such as light intensity switches and modulators, high-speed flat panel displays, and high-sensitivity sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Investigation Of Deposition Process Parameter Effects On Gar...mentioning

confidence: 94%

mentioning

confidence: 99%

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Bi-substituted Ferrite Garnet Type Magneto-Optic Materials Studied at ESRI Nano-Fabrication Laboratories, ECU, Australia

Nur-E-Alam¹,

Vasiliev²,

Alameh³

2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The variations in RF sputtering process parameters (substrate stage temperature and rotation rate) influence the properties (films' stoichiometry and MO quality through variations in both the specific Faraday rotation and the optical absorption coefficients) of garnet films. We concluded from this study that the MO characteristics can be tuned and optimized for use in various magnetic field-driven nano-photonics and integrated optics devices with the addition of a flexible and economical approach for the design and development of new, high-quality, and application-specific MO materials for various photonics and integrated-optics applications [38].…”

Section: Investigation Of Deposition Process Parameter Effects On Gar...mentioning

confidence: 96%

Bi-Substituted Ferrite Garnet Type Magneto-Optic Materials Studied at ESRI Nano-Fabrication Laboratories, ECU, Australia

Nur-E-Alam

Vasiliev²,

Alameh³

2022

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Since 2007, at the Electron Science Research Institute (ESRI) nano-fabrication laboratories, Edith Cowan University, Australia, we have devoted research efforts to the synthesis and characterization of bismuth-containing ferrite-garnet-type thin-film magneto-optic (MO) materials of different compositions. We report on the growth and characteristics of radio frequency (RF) magnetron sputtered bismuth-substituted iron-garnet thin films. We study the process parameters associated with the RF magnetron sputter deposition technique and investigate the results of optimizing process parameters. To achieve the best MO properties, we employ a few unique techniques, such as co-sputtered nanocomposite films and all-garnet multilayer structures, as well as the application of oxygen plasma treatment to amorphous garnet layers immediately following the deposition process. We demonstrated a remarkable enhancement in the MO properties of Bi-containing ferrite-type garnet thin-film materials, including record-high MO figures of merit and improved conventional and unconventional hysteresis loops of Faraday rotation. Previously unpublished research results on the forward-looking applications of magnetic garnet coatings applied to microparticles of advanced luminescent materials are reported. In the context of developing the next-generation ultra-fast optoelectronic devices, such as light intensity switches and modulators, high-speed flat panel displays, and high-sensitivity sensors, it is important to consider the desirable optical, magnetic, and magneto-optic properties that are found in highly bismuth-substituted iron garnet thin-film materials of various composition types.

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“…Modified ferrite garnets, especially Bi-substituted iron garnets (with compositions close to Bi 3 Fe 5 O 12 ) have very high specific Faraday rotations across the visible light spectrum and relatively low optical absorption in the near-infrared spectral region. Multiple process parameters relevant to the synthesis of substituted iron garnet materials have a significant influence on their physical (structural, optical and magnetic) properties [30,31,32,33]. However, it is always challenging to develop application-specific substituted ferrite garnet thin-film materials with high quality (in terms of their structural, optical and magneto-optical properties being optimized simultaneously) by using physical vapor deposition techniques.…”

Section: Introductionmentioning

confidence: 99%

Properties of Ferrite Garnet (Bi, Lu, Y)3(Fe, Ga)5O12 Thin Film Materials Prepared by RF Magnetron Sputtering

et al. 2018

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This work is devoted to physical vapor deposition synthesis, and characterisation of bismuth and lutetium-substituted ferrite-garnet thin-film materials for magneto-optic (MO) applications. The properties of garnet thin films sputtered using a target of nominal composition type Bi0.9Lu1.85Y0.25Fe4.0Ga1O12 are studied. By measuring the optical transmission spectra at room temperature, the optical constants and the accurate film thicknesses can be evaluated using Swanepoel’s envelope method. The refractive index data are found to be matching very closely to these derived from Cauchy’s dispersion formula for the entire spectral range between 300 and 2500 nm. The optical absorption coefficient and the extinction coefficient data are studied for both the as-deposited and annealed garnet thin-film samples. A new approach is applied to accurately derive the optical constants data simultaneously with the physical layer thickness, using a combination approach employing custom-built spectrum-fitting software in conjunction with Swanepoel’s envelope method. MO properties, such as specific Faraday rotation, MO figure of merit and MO swing factor are also investigated for several annealed garnet-phase films.

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Influence of Substrate Stage Temperature and Rotation Rate on the Magneto-Optical Quality of RF-Sputtered Bi2.1Dy0.9Fe3.9Ga1.1O12 Garnet Thin Films

Cited by 5 publications

References 35 publications

Bi-substituted Ferrite Garnet Type Magneto-Optic Materials Studied at ESRI Nano-Fabrication Laboratories, ECU, Australia

Bi-substituted Ferrite Garnet Type Magneto-Optic Materials Studied at ESRI Nano-Fabrication Laboratories, ECU, Australia

Bi-Substituted Ferrite Garnet Type Magneto-Optic Materials Studied at ESRI Nano-Fabrication Laboratories, ECU, Australia

Properties of Ferrite Garnet (Bi, Lu, Y)3(Fe, Ga)5O12 Thin Film Materials Prepared by RF Magnetron Sputtering

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