Yttrium Iron Garnet

Prduct Description

Deltronic Crystal’s single-crystal Yttrium Iron Garnet (YIG) is the most thoroughly characterized ferrimagnetic material available.
For Magneto-optical applications, magnetically saturated YIG rods rotate the polarization plane of light. Known as the Faraday effect, which is used in optical isolators.
For Microwave applications, YIG spheres high-Q resonance over a broad frequency range makes its use attractive in a variety of products including, magnetic resonance filters, tuned oscillators, and tuned band-reject and band-pass filters.

Applications

  • Optical Isolators
  • Multiplexers
  • Tuned Oscillators
  • Band-reject Filters
  • Optical Switches
  • Magnetic-field Sensors
  • Fiberoptic Sensors

Features

  • Low Temperature Dependence of Faraday Rotation
  • Highly Transparent from 1.2 - 5mm
  • High Q for Microwave Applications
  • Grown by Flux Technique
  • Superior Properties for both Optical and Microwave Applications

 
Property at 25°C Pure YIG Ga:YIG
Empirical Formula Y3Fe5O12 Y3Fe4.05Ga.95O12
Molecular Weight (grams) 737.95 751.13
Crystal Structure Cubic Cubic
Space Group La3d La3d
Density (g-cm3) 5.17 5.28
Melting Point (oC) 1555 1545
Hardness (moh) 6.5 to 7.0  
Lattice Constant (Å) 12.376 12.36
Saturation Magnetization (Gauss) 1780 400
Ferrimagnetic Resonance Linewidth (Oe) <0.30 <0.95
Magnetic Anisotropy (erg/cm3) -6.20 x 10-3 -1.7 x 10-3
Magnetic Anisotropy (erg/cm3) -0.05 x 10-3 -6.20 x 10-3
Effective g factor 2 2
Gyromagnetic ratio (MHz/Gauss-1) 2.8 2.8
Magnetostrictive Coefficient -2.73 x 10-6 -0.95 x 10-6
Magnetostrictive Coefficient -1.25 x 10-6 -0.95 x 10-6
Magnetostrictive Coefficient -2.20 x 10-6  
Electrical Resistivity (Ù/cm) 1 x 1014  
Young’s Modulus 2 x 1012 1 x 1012
Poisson’s Ratio 0.29 0.25
Dielectric Constant 15 15
Curie Temperature (K) 553  
Thermal Conductivity (W/cm-1/°C-1) 0.074  
Thermal Expansion Coefficient (°C-1) 1.04 x 10-5  
Refractive index, 1310 nm 2.2  
Refractive index, 1550 nm 2.19  
Specific Heat 4.5  
Optical Absorption, 1310 nm (cm-1) 0.05 0.05
Faraday Rotation, 1310 nm (°mm-1) 21.4 14.5
Transmittance1 (%) >95 >95
Magneto-optical Sensitivity (°A-1) 0.14 0.6

 

Crystallographic Orientations, Dimensions, and Tolerances
Standard Dimensions:  
Faraday Rotators 2.1, 2.7mm length
Spheres 1.8 to 5mm diameters 0.007" to 0.1"
Dimension Tolerances ±0.005" length, ±0.002" diameter
Orientations <100>
Flatness <λ/5 at 633nm
Surface Quality <10/5 (scratch/dig)
Parallelism, polished faces <10 arc-minutes
Anti-reflective Coatings Specify
Other Dopants Specify