Strain Broadening of E.P.R. Linewidths in Fe/Mgo Single Crystals and Powders

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Strain Broadening of E.P.R. Linewidths in Fe/Mgo Single Crystals and Powders

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Title: Strain Broadening of E.P.R. Linewidths in Fe/Mgo Single Crystals and Powders
Author: Al Hawery, A. S.; Thorp, J. S.; Skinner, A. R.
Abstract: The E.P.R. linewidth of the M= + 1/2 <-» -1/2 transition of Fe3+ spectrum of Fe/MgO single crystals and powders have been measured at 9 GHz before and after annealing. The nominal iron concentrations ranged from 310 to 11900 p.p.m. Specimens were annealed at 500°C up to 24 hours. For single crystal, anneal¬ing produced reductions in peak-to-peak linewidth (AHpp) which occurred in two stages for all the spec¬imens examined. The values of the first and second decay rates were found to be concentration dependent. For powdered single crystal, annealing produced an increase in the peak-to-peak linewidth (AHpp).
URI: http://hdl.handle.net/10576/10294
Date: 2004

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