Abstract
Rare-earth and Bi-substituted iron garnet thin film materials exhibit strong potential for application in various fields of science and frontier optical technologies. Bi-substituted iron garnets possess extraordinary optical and MO properties and are still considered as the best MO functional materials for various emerging integrated optics and photonics applications. However, these MO garnet materials are rarely seen in practical photonics use due to their high optical losses in the visible spectral region. In this paper, we report on the physical properties and magneto-optic behaviour of high-performance RF sputtered highly bismuth-substituted iron garnet and garnet-oxide nanocomposite films of generic composition type (Bi, Dy/Lu)3(Fe, Ga/Al)5O12. Our newly synthesized garnet materials form high-quality nanocrystalline thin film layers which demonstrate excellent optical and MO properties suitable for a wide range of applications in integrated optics and photonics.
Highlights
It is more than 40 years since the giant magneto-optical effects in bismuth-substituted iron garnets (Bi:IG) were reported first in 1969 and used extensively for fabricating various magnetic recording media
The synthesis efforts aimed at controlling the properties of Bi:IG compounds containing various metal dopants have started back in 1960s, and different methods were used, including Pulsed Laser Deposition (PLD), Liquid Phase Epitaxy (LPE), Ion Beam Sputtering (IBS), Reactive Ion Beam Sputtering (RIBS), Sol-gel process, and RF magnetron sputtering [1,2,3,4,5,6,7,8,9]
We report on the physical properties and behaviour of several RF-sputtered high-performance, highly bismuthsubstituted ferrimagnetic garnet materials which are suitable for integration into various photonic devices and for many magneto-optic applications
Summary
It is more than 40 years since the giant magneto-optical effects in bismuth-substituted iron garnets (Bi:IG) were reported first in 1969 and used extensively for fabricating various magnetic recording media. Extensive studies have been conducted by multiple groups working world-wide to synthesize new garnet materials with properties suitable for various emerging technologies and having a high Bi content and other metal-atom dopants like Ga or Al within the garnet structure. The physical properties (optical, magnetic, and MO) of all garnet materials depend significantly on the Bi content and the substitution of other extra atoms and dopants within the sublattices of the garnet structure, and on the multiple process parameters relevant to the synthesis of Bi:IGs [3]. We report on the physical properties and behaviour (especially the magnetic switching behaviour) of several RF-sputtered high-performance, highly bismuthsubstituted ferrimagnetic garnet materials which are suitable for integration into various photonic devices and for many magneto-optic applications
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