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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 2, Iss. 4 — Apr. 1, 1985
  • pp: 600–605

Femtosecond relaxation dynamics in magnetic garnets

B. I. Greene and R. Wolfe  »View Author Affiliations

JOSA B, Vol. 2, Issue 4, pp. 600-605 (1985)

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The first known quantitative measurements of an ultrafast relaxation process in yttrium iron garnet (YIG) are presented. Decay out of the initially excited crystal field state at 16 000 cm−1 was observed to occur in 100 ± 40 fsec. Additional measurements performed on YGG:Fe (Y3Ga4.8Fe0.2O12) at 298 and 2.6 K implicate the involvement of charge-transfer states in this ultrafast relaxation. Lifetimes of less than 2 fsec are indicated for pure charge-transfer states. No dynamic manifestation of the strong antiferromagnetic exchange coupling between iron ions in YIG is evident.

© 1985 Optical Society of America

Original Manuscript: September 20, 1984
Manuscript Accepted: November 13, 1984
Published: April 1, 1985

B. I. Greene and R. Wolfe, "Femtosecond relaxation dynamics in magnetic garnets," J. Opt. Soc. Am. B 2, 600-605 (1985)

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