Yttrium iron garnet

Yttrium iron garnet
General
Category Synthetic mineral
Formula
(repeating unit)		 Y3Fe2(FeO4)3 or Y3Fe5O12
Identification
Formula mass 737.94[1]
Color Green[1]
Density 5.11 g/cm3[1]
Other characteristics Ferrimagnetic material

Yttrium iron garnet (YIG) is a kind of synthetic garnet, with chemical composition Y3Fe2(FeO4)3, or Y3Fe5O12. It is a ferrimagnetic material[1] with a Curie temperature of 560 K.[2] YIG may also be known as Yttrium ferrite garnet, or as Iron yttrium oxide or Yttrium iron oxide, the latter two names usually associated with powdered forms.[3]

In YIG, the five iron(III) ions occupy two octahedral and three tetrahedral sites, with the yttrium(III) ions coordinated by eight oxygen ions in an irregular cube. The iron ions in the two coordination sites exhibit different spins, resulting in magnetic behavior.[2] By substituting specific sites with rare earth elements, for example, interesting magnetic properties can be obtained.[4]

YIG has a high Verdet constant which results in the Faraday effect,[5] high Q factor in microwave frequencies,[6] low absorption of infrared wavelengths down to 450 nm,[7] and very small linewidth in electron spin resonance. These properties make it useful for MOI (magnetic optical imaging) applications in superconductors.[8]

YIG is used in microwave, acoustic, optical, and magneto-optical applications, e.g. microwave YIG filters, or acoustic transmitters and transducers.[9] It is transparent for light wavelengths over 600 nm. It also finds use in solid-state lasers in Faraday rotators, in data storage, and in various nonlinear optics applications.[10]

See also

References

  1. 1 2 3 4 "Yttrium Iron Garnet - YIG". American Elements. Retrieved April 1, 2015.
  2. 1 2 Vladimir Cherepanov, Igor Kolokolov, and Victor L'Vov (1993). "The Saga of YIG: Spectra, Thermodynamics, Interaction and Relaxation of Magnons in a Complex Magnet" (PDF). Physics Reports. pp. 84–144. Retrieved April 1, 2015.
  3. ↑ "Yttrium Iron Oxide / Yttrium Ferrite (Y3Fe5O12) Nanoparticles – Properties, Applications". AZoNano.com. September 10, 2013. Retrieved April 1, 2015.
  4. ↑ J Goulon, A Rogalev, F Wilhelm, G Goujon, A Yaresko, Ch Brouder, and J Ben Youssef (2012). "Site-selective couplings in x-ray-detected magnetic resonance spectra of rare-earth-substituted yttrium iron garnets" (PDF). New Journal of Physics. pp. 1–30. Retrieved April 2, 2015.
  5. ↑ K.T.V. Grattan & B.T. Meggitt, ed. (1999). Optical Fiber Sensor Technology: Volume 3: Applications and Systems. Springer Science & Business Media. p. 214-215. ISBN 9780412825705. Retrieved April 2, 2015.
  6. ↑ Leonid Alekseevich Belov, Sergey M. Smolskiy, & Viktor Neofidovich Kochemasov (2012). Handbook of RF, Microwave, and Millimeter-wave Components. Artech House. p. 150. ISBN 9780412825705. Retrieved April 2, 2015.
  7. ↑ Rajpal S. Sirohi (1990). Optical Components, Systems and Measurement Techniques. CRC Press. p. 80. ISBN 9780824783952. Retrieved April 2, 2015.
  8. ↑ "Magneto-Optical Imaging of Superconductors". Department of Physics, University of Oslo. November 30, 2010. Retrieved April 2, 2015.
  9. ↑ "Periodic Table of Elements: Yttrium". Los Alamos National Laboratory. Retrieved April 1, 2015.
  10. ↑ Holm, U., Sohlstrom, H., & Brogardh, T. (1984). "YIG-Sensor Design for Fiber Optical Magnetic-Field Measurements". Proceedings of the Society of Photo-Optical Instrumentation Engineers, 514, 333–336.
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