Cerium Yttrium Ferrite
Cerium Yttrium Ferrite sputtering targets from Infinita Materials supply a heavily cerium-substituted yttrium iron garnet, Ce2.5Y0.5Fe5O12, engineered for magneto-optical thin-film deposition. Replacing most of the yttrium in the garnet lattice with cerium multiplies the Faraday rotation far beyond that of undoped yttrium iron garnet, making this composition the material of choice for integrated optical isolators and circulators.
| Purity (%) : | >99.9 |
| Dimensions : | Dia. 1”, Thick. 0.125” Dia. 2”, Thick. 0.25” |
Introduction to Cerium Yttrium Ferrite
Cerium Yttrium Ferrite (Ce₂.₅Y₀.₅Fe₅O₁₂) is a highly cerium-substituted rare-earth iron garnet derived from Y₃Fe₅O₁₂, retaining the cubic garnet structure while replacing most Y³⁺ sites with Ce ions. High cerium loading and mixed Ce³⁺/Ce⁴⁺ valence strongly modify the electronic structure and produce exceptionally large Faraday rotation in the near-infrared telecom range. Because heavily Ce-substituted compositions are difficult to stabilise by equilibrium bulk growth, magnetron sputtering provides a practical route for reproducible thin-film deposition with controlled composition and thickness. Sputtered films combine strong magneto-optical activity with low optical absorption, making them valuable for integrated photonics, including optical isolators, circulators, magneto-optic sensors, non-reciprocal photonic devices, and emerging spintronic structures.
FAQs
Question: Why substitute cerium for yttrium in yttrium iron garnet?
Answer: Cerium substitution perturbs the electronic structure around the garnet's iron sublattice in a way that multiplies the Faraday rotation coefficient far beyond that of undoped yttrium iron garnet, which is essential for making practical, thin, on-chip isolator films.
Introduction to Cerium Yttrium Ferrite
Cerium Yttrium Ferrite (Ce₂.₅Y₀.₅Fe₅O₁₂) is a highly cerium-substituted rare-earth iron garnet derived from Y₃Fe₅O₁₂, retaining the cubic garnet structure while replacing most Y³⁺ sites with Ce ions. High cerium loading and mixed Ce³⁺/Ce⁴⁺ valence strongly modify the electronic structure and produce exceptionally large Faraday rotation in the near-infrared telecom range. Because heavily Ce-substituted compositions are difficult to stabilise by equilibrium bulk growth, magnetron sputtering provides a practical route for reproducible thin-film deposition with controlled composition and thickness. Sputtered films combine strong magneto-optical activity with low optical absorption, making them valuable for integrated photonics, including optical isolators, circulators, magneto-optic sensors, non-reciprocal photonic devices, and emerging spintronic structures.
Key Properties of Cerium Yttrium Ferrite
| Property | Value | Significance |
|---|
| Chemical Formula | Ce2.5Y0.5Fe5O12 | Defines the heavily cerium-substituted garnet stoichiometry that drives the material’s enhanced Faraday rotation relative to plain yttrium iron garnet |
| CAS Number | Not established | No distinct CAS registry number exists for this specific highly Ce-substituted garnet composition; it is identified in practice by formula and supplier part number |
| Purity | 99.9% – 99.99% | Higher purity grades reduce optical absorption losses and scattering centres in the deposited magneto-optic film |
| Molar Mass | ~865.96 g/mol | Calculated from standard atomic weights for the Ce2.5Y0.5Fe5O12 formula unit; used for stoichiometry and deposition-rate calculations |
| Density (theoretical) | ~5.5 g/cm3 | Estimated from the garnet lattice expansion and added mass of cerium substitution relative to undoped yttrium iron garnet (~5.17 g/cm3); higher sintered density in the target reduces arcing and improves sputter uniformity |
| Melting Point | ~1,500 C | Indicates the thermal stability margin available during sputtering and any post-deposition annealing used to develop the garnet phase |
| Crystal Structure | Cubic garnet (Ia-3d), Y3Fe5O12 type | Same garnet framework as yttrium iron garnet, with cerium occupying most of the dodecahedral rare-earth sites and inducing lattice expansion |
| Magnetic / Optical Behaviour | Ferrimagnetic; strongly enhanced Faraday rotation | The property exploited in device applications: heavy cerium substitution amplifies magneto-optical rotation far beyond that of undoped yttrium iron garnet |
Types & Grades of Cerium Yttrium Ferrite
Cerium Yttrium Ferrite 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 sputtering disc target | 99.9% | General-purpose magnetron sputtering for research and process-development magneto-optic films |
| High-purity target | 99.95% – 99.99% | Lower trace-metal and oxide impurity content for isolator and circulator films where optical absorption must be minimised |
| Ultra-high-purity target | 99.995% and above | Research-grade material for fundamental studies of Faraday rotation and cerium valence behaviour in garnet thin films |
| Bonded target assembly | 99.9% – 99.99% | Indium- or elastomer-bonded to a backing plate for improved thermal management during extended sputtering runs |
| Custom cerium-loading composition | 99.9% and above | Ce: Y ratio adjustable around the Ce2.5Y0.5 baseline to trade off Faraday rotation strength against optical absorption for a specific device design |
Applications of Cerium Yttrium Ferrite
Sputtered films of Cerium Yttrium Ferrite 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 isolator and circulator films | Provides the large, non-reciprocal Faraday rotation needed to block back-reflected light in planar waveguide isolators |
| Telecommunications | Magneto-optic isolator coatings for laser modules and transceivers | Protects laser sources from destabilising back-reflections in fibre-optic and free-space telecom links |
| Spintronics | Magnetic thin-film heterostructures | Ferrimagnetic garnet layer with strong spin-orbit-coupled optical response supports spin-photon interface research. |
| Magnetic sensors | Magneto-optic sensing elements | Faraday rotation response to applied magnetic field enables optical readout of magnetic fields without direct electrical contact. |
| Non-volatile memory (FeRAM-adjacent research) | Ferrimagnetic garnet films | Stable magnetic ordering at room temperature supports exploratory magnetic memory and logic device structures. |
| Optoelectronics and photonic components | Non-reciprocal thin-film elements | Enables planar, wafer-compatible magneto-optic components that are difficult to achieve with bulk garnet crystals |
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 Cerium Yttrium Ferrite 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.
Frequently Asked Questions
What are the advantages of using CeYFeO₃ as a sputter target?
CeYFeO₃ has excellent ferroelectric and magnetic properties, making it suitable for developing high-performance devices. It allows the development of films with higher energy efficiency, high sensitivity, and stability in electronic and sensor applications.
Why substitute cerium for yttrium in yttrium iron garnet?
Cerium substitution perturbs the electronic structure around the garnet's iron sublattice in a way that multiplies the Faraday rotation coefficient far beyond that of undoped yttrium iron garnet, which is essential for making practical, thin, on-chip isolator films.
Cerium Yttrium Ferrite
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