High Quality and Large Size Yttrium Iron Garnet Crystal Grown by Top Seeded Solution Growth Technique

doi:10.15541/jim20220353

Abstract

Abstract:

Yttrium iron garnet (Y₃Fe₅O₁₂, YIG) crystals have been widely used in microwave and magneto-optic devices due to their excellent magnetic and magneto-optical properties. Currently, the commercial material is YIG single crystal thin films, which is deposited on Gd₃Ga₅O₁₂ (GGG) substrate using liquid phase epitaxy technique. Herein, we report a new growth technology of YIG single crystal by top seeded solution growth (TSSG) technique from lead-free B₂O₃-BaF₂ flux. The maximum size and weight of the as-grown YIG crystal can be up to 43 mm× 46 mm×11 mm and 60 g, respectively. The crystals exhibit excellent comprehensive performances with narrow ferromagnetic resonance linewidth (0.679 Oe, 1 Oe=250/π A/m), high transparency (75%) and Faraday rotation angle (200 (°)·cm^-1@1310 nm and 160 (°)·cm^-1@1550 nm), indicating a good candidate in microwave and magneto-optic devices. More significantly, this growth technique is ideally suited to large size YIG or doped-YIG single crystals ascombined with the oriented seed crystal and lifting process, which can significantly decrease the manufacture cost.

Key words: yttrium iron garnet, single crystal, TSSG method, ferromagnetic resonance linewidth, magneto-optic effect

CLC Number:

TQ174

YANG Xiaoming, LAN Jianghe, WEI Zhantao, SU Rongbing, LI Yang, WANG Zujian, LIU Ying, HE Chao, LONG Xifa. High Quality and Large Size Yttrium Iron Garnet Crystal Grown by Top Seeded Solution Growth Technique[J]. Journal of Inorganic Materials, 2023, 38(3): 322-328.

Figures/Tables 6

Fig. 1 Photo showing formation process of as-growth YIG single crystals

Fig. 2 XRD patterns and garnet structure of YIG crystal (a) XRD patterns and standard diffraction card; (b) Garnet structure; (c) Positions and sublattice structure of positive ions; (d) Oxygen coordination of positive ions

Fig. 3 Magnetic properties of YIG crystal (a) Enlarged M-H curve in the magnetic field of -1000-1000 Oe; (b) M-H curve at room temperature; (c) Temperature-dependent magnetization for an applied magnetic field of 1000 Oe (1 emu=10-3 A·m-2, 1 Oe=250/π A·m-1)

Fig. 4 Dielectric properties and FMR linewidth of YIG crystal (a, b) Temperature dependent dielectric constant (ε') and loss (tanδ) measured at the frequencies of 10 Hz-1 MHz; (c) FMR linewidth of the YIG spheres showed in the upright inset; (d) Average ΔH of the spheres (1 Oe=250/π A·m-1)Colorful figure is available on website

Fig. 5 Transmittance of YIG crystal and Faraday rotation angle at 1310 and 1550 nm

Fig. 6 X-ray photoelectron spectra and their Lorentzian-Gaussian dividing results of YIG crystal powders (a) Fe2p; (b) O1s; Colorful figure is available on website

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