Bismuth Dysprosium Iron Gallate (Bi2DyFe4GaO12) sputtering targets for deposition of magneto-optical iron garnet thin films. This bismuth- and gallium-substituted dysprosium iron garnet is engineered for large Faraday rotation with reduced optical absorption, supporting ferrimagnetic thin-film performance in integrated photonic and magneto-optic sensor applications. Targets are available in standard catalogue sizes IN-BiDyFeGa-01 and IN-BiDyFeGa-02, with custom dimensions, purities, and cation ratios produced to order.
Bismuth Dysprosium Iron Gallate (Bi₂DyFe₄GaO₁₂) is a bismuth-substituted rare-earth iron garnet with the cubic garnet structure, containing Bi³⁺ and Dy³⁺ on dodecahedral sites and Ga³⁺ partially substituting for Fe³⁺ on the octahedral/tetrahedral sublattices. Bi³⁺ strongly enhances magneto-optical activity and Faraday rotation, while Ga³⁺ dilutes the iron sublattice, reducing saturation magnetisation and optical absorption. Dy³⁺ contributes additional magnetocrystalline anisotropy, allowing magnetic and optical properties to be balanced. As a sputtering target, a pre-alloyed ceramic composition provides precise Bi:Dy:Fe stoichiometry and wafer-scale uniformity. RF or pulsed-DC magnetron sputtering enables thin films for optical isolators and circulators, magneto-optic sensors, and planar nonreciprocal photonic devices requiring strong Faraday rotation with controlled optical loss.
Answer: Bismuth dysprosium iron gallate is also used in magnetoelectric devices, microwave technology, magnetic refrigeration, and spintronic applications.
Bismuth Dysprosium Iron Gallate (Bi₂DyFe₄GaO₁₂) is a bismuth-substituted rare-earth iron garnet with the cubic garnet structure, containing Bi³⁺ and Dy³⁺ on dodecahedral sites and Ga³⁺ partially substituting for Fe³⁺ on the octahedral/tetrahedral sublattices. Bi³⁺ strongly enhances magneto-optical activity and Faraday rotation, while Ga³⁺ dilutes the iron sublattice, reducing saturation magnetisation and optical absorption. Dy³⁺ contributes additional magnetocrystalline anisotropy, allowing magnetic and optical properties to be balanced. As a sputtering target, a pre-alloyed ceramic composition provides precise Bi:Dy:Fe stoichiometry and wafer-scale uniformity. RF or pulsed-DC magnetron sputtering enables thin films for optical isolators and circulators, magneto-optic sensors, and planar nonreciprocal photonic devices requiring strong Faraday rotation with controlled optical loss.
Key Properties of Bismuth Dysprosium Iron Gallate
Property
Value
Significance
Chemical Formula
Bi2DyFe4GaO12
Confirms the bismuth- and dysprosium-shared dodecahedral A-site together with gallium-substituted iron on the B-sites, distinguishing it from unsubstituted dysprosium iron garnet
Crystal Structure
Cubic garnet, space group Ia-3d
Governs epitaxial compatibility with garnet substrates and the origin of the material’s magneto-optical activity
CAS Number
Not established
No CAS registry number is assigned to this specific mixed-cation garnet composition
Molar Mass
~1065.56 g/mol
Basis for stoichiometric calculations in target fabrication and film thickness/deposition-rate estimates
Density (theoretical)
~7.3 – 7.5 g/cm3
Benchmarks the sintered target’s achievable density, typically reported at greater than 90% of theoretical for production targets
Purity
>99.9%
Limits trace-metal and secondary-phase content that can degrade magneto-optical figure of merit and optical transmission
Magnetic Ordering
Ferrimagnetic (below Neel/Curie temperature)
Provides the net sublattice magnetisation required for Faraday rotation and magneto-optic Kerr response
Optical Activity
Enhanced Faraday rotation via Bi3+-Fe3+ charge-transfer bands, moderated by Ga3+ dilution of the iron sublattice
Enables strong rotation per unit film thickness at near-infrared telecom wavelengths while limiting optical absorption
Types & Grades of Bismuth Dysprosium Iron Gallate
Bismuth Dysprosium Iron Gallate targets are offered in standard catalogue sizes and grades, with custom purity, density, and geometry available for OEM and R&D deposition systems.
Grade / Form
Typical Purity
Key Features / Uses
Standard Research Grade
99.9%
Economical option for early-stage magneto-optic film screening and sputtering process development
High-Purity Photonics Grade
99.99%
Reduced cation vacancy and Fe2+ defect content for lower optical loss in integrated isolator films
Custom Bi:Dy:Ga Ratio Blend
99.9% – 99.99%, custom composition
Cation ratios adjusted to tune Faraday rotation strength, saturation magnetisation, and absorption edge for a target device design
Bonded Target (indium or elastomer backing)
99.9% and higher
Improved thermal conductivity for extended RF magnetron sputtering runs without target cracking
Rotary/Cylindrical Format
99.9% and higher
Higher material utilisation and longer campaign life for high-throughput production coating lines
Applications of Bismuth Dysprosium Iron Gallate
Sputtered films of Bismuth Dysprosium Iron Gallate support demanding roles across research and production applications where this material’s specific structural, electronic, or optical properties are the key requirement.
Industry
Application
Function
Integrated Photonics
On-chip optical isolators and circulators
Delivers nonreciprocal Faraday rotation that suppresses back-reflections into laser sources
Telecommunications
Faraday rotator films for fibre-optic isolator assemblies
Provides a high magneto-optic figure of merit at the 1310 nm and 1550 nm telecom windows with reduced insertion loss
Magneto-Optic Sensing
Current and magnetic-field sensors
Converts local magnetic field strength into a measurable, non-contact optical rotation signal
Microwave and RF Electronics
Tunable ferrite filter and resonator coatings
Ferrimagnetic resonance behaviour supports narrowband microwave filtering and circulator design.
Data Storage Research
Magneto-optic and magnetic-domain memory studies
Stable ferrimagnetic domains in thin garnet films support bit-storage and domain-wall research.
Materials Research
Cation-substitution and magneto-optical figure-of-merit studies
Serves as a model garnet system for studying how combined rare-earth/bismuth and gallium substitution tunes rotation versus absorption tradeoffs
Why Partner with Infinita Materials?
Technical Depth: in-house quality control with ICP-MS and XRF purity verification, density measurement, and full certificates of analysis on every target.
Global Logistics: reliable supply from single R&D-scale targets to production-line volumes, with established international shipping.
Responsive Support: direct access to materials engineers for grade, bonding, and geometry selection, and process-compatibility questions.
Take the Next Step
Infinita Materials fabricates Bismuth Dysprosium Iron Gallate sputtering targets engineered to the purity, density, and geometry your deposition process requires. Whether the requirement is a standard catalogue target or a custom size, purity, or bonded assembly, our team can help match the right specification to your deposition system. Request a quote or speak with our technical team to discuss your target specification.
Other Related Product to Bismuth Dysprosium Iron Gallate, Bi2DyFe4GaO12
Bi₂DyFe₄GaO₁₂ is deposited using magnetron sputtering or radio-frequency (RF) sputtering techniques.
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