Applied Magnetic Resonance

, Volume 11, Issue 3–4, pp 487–492 | Cite as

Temperature and concentration dependences of the spin-lattice relaxation rate in four borate glasses doped with Fe2O3

  • P. K. Zinsou
  • D. Vergnoux
  • G. Ablart
  • J. Pescia
  • S. K. Misra
  • R. Berger


Spin-lattice relaxation time (T 1) of Fe3+ ions has been measured in four borate glasses doped with 0.25, 0.5, 1 and 3 wt.% Fe2O3 by the modulation method over the temperature range 5–250 K. In the three less concentrated samples, it was observed thatT 1 −1. αT at intermediate temperatures. This is explained in terms of a relaxation mechanism involving TLS (Two Level Systems). At higher temperatures, the temperature dependence ofT 1 −1 is slowed down by cross-relaxation. In the most concentrated sample, the exchange interaction plays a dominant role leading to a very different relaxation-time behaviour, described well by the Bloembergen and Wang three-reservoir model.


Exchange Interaction Glass Sample Amorphous Silicon Borate Glass Linear Temperature Dependence 
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Copyright information

© Springer 1996

Authors and Affiliations

  • P. K. Zinsou
    • 1
  • D. Vergnoux
    • 1
  • G. Ablart
    • 1
  • J. Pescia
    • 1
  • S. K. Misra
    • 2
  • R. Berger
    • 3
  1. 1.Laboratoire de Magnétisme et d’Electronique Quantique (LMEQ)Université Paul SabatierToulouse CedexFrance
  2. 2.Physics DepartementConcordia UniversityMontrealCanada
  3. 3.Université de Bordeaux ITalence CedesFrance

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