Magneto-optical properties and magnetic anisotropy of Nd_05Bi_25Fe_5-yGa_yO_12 thin films on glass substrates

Lou, Gengjian; Kato, Takeshi; Iwata, S.; Ishibashi, Takayuki

doi:10.1364/ome.7.002248

Cited by 13 publications

(7 citation statements)

References 42 publications

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“…Ku and the gyromagnetic ratio g were estimated by fitting the dependence of Hres. The Ku values obtained in this analysis were approximately the same as those measured via torque measurements 41) . The -factor values were obtained using the equation, = ℎ 2 K ⁄ , where K is the Bohr magneton and ℎ is Planck's constant, and are plotted as a function of the Ga content in Fig.…”

Section: A D V a N C E P U B L I C A T I O Nsupporting

confidence: 64%

“…However, some secondary phases existed and the annealing temperature was too high for general glass substrates. Meanwhile, our group successfully prepared polycrystalline BIG films on Bi1:YIG buffer layers 39) and Bi2.5Ga:NIG on Bi1:NIG buffer layers 40), 41) . These films were prepared at annealing temperatures of 600-700ºC 42) , which were sufficiently low to enable the use of glass substrates.…”

Section: Biga:nig On Glass Substratementioning

confidence: 99%

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Magneto-optical Imaging Using Bismuth-substituted Iron Garnet Films Prepared by Metal–Organic Decomposition

Ishibashi

2020

J. Magn. Soc. Jpn.

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Magneto-optical (MO) imaging using an MO material is one of the most important imaging techniques for measuring magnetic field distributions. The technique is attracting attention because of its ability to visualize magnetic fields and current distributions at a wide range of temperatures from cryogenic to room temperature or higher, a wide range of length scales from micrometers to several tens of centimeters, and a wide range of frequencies from DC to GHz. Nevertheless, further development of films with good MO properties is required in order to extend the range of applications of MO imaging. In this paper, developments related to bismuth-substituted iron garnet films, R3−xBixFe5−yGayO12 (R = Y, Nd; 1 ≤ x ≤ 3), prepared by metal-organic decomposition for MO imaging plates are reviewed. In addition, an MO imaging plate with an electroluminescent backlight, which enables wide-area MO imaging, and the MO color imaging technique, which indicates the strength of a magnetic field using colors, are reviewed.

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Section: A D V a N C E P U B L I C A T I O Nsupporting

confidence: 64%

Section: Biga:nig On Glass Substratementioning

confidence: 99%

Magneto-optical Imaging Using Bismuth-substituted Iron Garnet Films Prepared by Metal–Organic Decomposition

Ishibashi

2020

J. Magn. Soc. Jpn.

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“…New material system development is likely to be the source of these enhancements. MO thin-film garnet materials (single and multilayer) and nano-structured magnetic photonic crystals (MPCs) have emerged as a cutting-edge research area worldwide [20][21][22][23][24][25][26][27][28][29][30]. Fabrication of high-quality thin films with strong control over their microstructure, surface and interface quality, and optical and magnetic behaviors is required for the successful practical deployment of these garnet materials.…”

Section: Introductionmentioning

confidence: 99%

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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“…To overcome this problem, we have succeeded in preparing highly Bi-substituted neodymium iron garnet (Nd 3−x Bi x Fe 5−y Ga y O 12 ) films on glass and GGG substrates by the metal-organic decomposition (MOD) method. [24][25][26][27][28][29][30][31][32] Considering the large-scale measurement of MO images, we need to develop a novel optical system, because the conventional setup used for the Kerr microscope is not applicable for large-scale imaging. If we use the same concept of the conventional setup for a large-scale imaging, large lenses and mirrors are required to obtain a sufficient polarization property for MO imaging, which will be too large for practical use.…”

Section: Introductionmentioning

confidence: 99%

“…The detail of the film preparation was described elsewhere. 25) The thicknesses of the Bi1:NIGG and Bi2.5:NIG thin films used in this study were 90 and 600 nm, respectively. X-ray diffraction (XRD) measurement by 2θ=ω scan was carried out using a high-resolution XRD instrument (Rigaku, SmartLab).…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical imaging plate with backlight for quantitative measurement of magnetic field distribution

Nagakubo¹,

Sasaki²,

Meguro³

et al. 2018

Jpn. J. Appl. Phys.

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We develop a light source, a polarizing film, and a highly bismuth-substituted neodymium iron garnet film which exhibits a large Faraday rotation angle of 11 deg., prepared on a ϕ150 mm diameter glass substrate by the metal-organic decomposition method. To measure the magnetic field distribution quantitatively, the 45°polarizer method was carried out. The magnetic field distribution of a bar magnet was quantitatively measured. Furthermore, we also carried out the polarization modulation method using a white light for quantitative magneto-optical (MO) imaging.

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Magneto-optical properties and magnetic anisotropy of Nd_05Bi_25Fe_5-yGa_yO_12 thin films on glass substrates

Cited by 13 publications

References 42 publications

Magneto-optical Imaging Using Bismuth-substituted Iron Garnet Films Prepared by Metal–Organic Decomposition

Magneto-optical Imaging Using Bismuth-substituted Iron Garnet Films Prepared by Metal–Organic Decomposition

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

Magneto-optical imaging plate with backlight for quantitative measurement of magnetic field distribution

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