Magneto-optical properties of spin-coated bismuth-substituted yttrium iron garnet films on silicon substrates at 1550-nm wavelength

Kim, Yudeuk; Bang, David Juseong; Kim, Yonghwan; Kim, Kyong Hon

doi:10.1063/1.5137769

Cited by 15 publications

(2 citation statements)

References 24 publications

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“…Bi-YIG is an outstanding magnetooptical material. [31,32] Therefore, we have selected Bi-YIG to study the magnetic structures using magneto-optical Kerr microscopy. We examine the evolution of magnetic textures, including circular, triangular, and hexagonal bubbles, and demonstrate that the orientation of the triangular bubbles can be flipped by changing the magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

et al. 2023

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Magnetic bubbles have again become a subject of significant attention following the experimental observation of topologically nontrivial magnetic skyrmions. In recent work, tailoring the shape of the bubbles is considered a key factor for their dynamics in spintronic devices. In addition to the reported circular, elliptical, and square bubbles, here we observe triangular bubble domains in bismuth-doped yttrium iron garnet (Bi-YIG) using Kerr microscopy. The bubble domains evolve from discrete circular to latticed triangular and hexagonal shapes. Further, the orientation of the triangular bubbles in the hexagonal lattices can be flipped by decreasing the magnetic field. The sixfold in-plane magnetic anisotropy of Bi-YIG(111) crystal, which is presumably the mechanism underlying the triangular shape of the bubbles, is measured as 1179 erg/cm3. The study of the morphologies of topologically trivial bubbles in YIG offers insight into nontrivial spin textures, which is appealing for future spintronic applications.

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Section: Introductionmentioning

confidence: 99%

Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

et al. 2023

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“…Yttrium iron garnet (YIG) and rare-earth iron garnets (RIG) are ferrimagnetic oxides with a Curie temperature well above the room temperature [1][2][3]. Bismuth substituted YIG and several RIG show high Faraday rotation and are useful for applications such as magnetic eld sensors [4][5][6]. YIG is one of the materials with the lowest losses at high frequencies and is used in microwave devices including resonators and lters [7][8][9]].…”

Section: Introductionmentioning

confidence: 99%

Growth Induced Magnetic Anisotropy in Yttrium Iron Garnet Films on Yttrium Aluminum Garnet Substrates

Sriniva

Liu

Zhou

et al. 2022

Preprint

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Yttrium iron garnet (YIG) is a ferrimagnetic oxide of importance for a variety of applications including magnetic field sensors and microwave signal processing devices. Most of the applications, however, require a bias magnetic field that impedes miniaturization of YIG based sensors and communication devices. This work is aimed at strain engineering of YIG films to realize an induced magnetic anisotropy field that could act as a built-in bias field. We discuss here pulsed laser deposition (PLD) and characterization of YIG films on yttrium aluminum garnet (YAG) substrates. One expects the − 3% lattice mismatch between the film and substrate to result in an in-plane compressive strain and out-of-plane tensile strain. Films with thickness 55 nm to 380 nm were deposited on (100), (110), and (111) YAG substrates and annealed at high temperatures were characterized by structural and magnetic characterization techniques. The uniaxial out-of-plane strain anisotropy field estimated from X-ray diffraction data varied from 0.5 to 4.kOe for the films, showed an increase with increasing film thickness, and the highest values were for films on (100)YAG. Ferromagnetic resonance (FMR) measurements at 5 to 10 GHz also revealed the presence of a growth induced uniaxial anisotropy field as high as 450 Oe in the films, that decreased with increasing film thickness. The FMR line-width varied from 19.5 Oe to 82 Oe with films on (100) YAG showing the smallest values. The PLD YIG films on YAG substrates exhibiting a large perpendicular anisotropy field have the potential for use in sensors and high frequency devices.

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Large Mid‐Infrared Magneto‐Optic Response from Doped Cadmium Oxide at Its Epsilon‐Near‐Zero Frequency

Schrecengost,

Cleri,

Tolchin

et al. 2024

Advanced Optical Materials

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The epsilon‐near‐zero (ENZ) frequency regime of transparent conducting oxide materials is known to yield large enhancements in their optical nonlinearity and electro‐optic response. Here, Faraday rotation is investigated in Gd and In‐doped CdO films and it is found that the Verdet constant peaks at values >3 105 deg T−1 m−1 near the ENZ frequency, which is tunable in the wavelength range 2 < λ< 10 µm by varying the doping concentration. These results are among the highest reported to date in the mid‐infrared spectral range and are in good agreement with the Drude model, which confirms that the magneto‐optic response of doped CdO derives from its free carriers. The combination of a tunable Verdet constant, low optical loss compared to other plasmonic materials, and the ability to deposit CdO on Si with no loss in performance make this material a promising platform for integrated magneto‐optic and magnetoplasmonic devices that operate across the mid‐infrared.

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Magneto-optical properties of spin-coated bismuth-substituted yttrium iron garnet films on silicon substrates at 1550-nm wavelength

Cited by 15 publications

References 24 publications

Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

Growth Induced Magnetic Anisotropy in Yttrium Iron Garnet Films on Yttrium Aluminum Garnet Substrates

Large Mid‐Infrared Magneto‐Optic Response from Doped Cadmium Oxide at Its Epsilon‐Near‐Zero Frequency

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