Dear All,
I have recently been characterising FeGa melt spun polycrystalline ribbons by several methods including VSM, SEM, TEM, XRD and EDX. I need to come up with a fairly simple and cost-effective method to measure the magnetostriction of theses ribbons.
Strain gauges are too large and not sensitive enough, my theoretical calculations show for a ribbon of the volume I have, the change in dimension would be approximately 3pm; we have considered the capacitance bridge method but this would cost ~£25K GBP to buy a capacitance bridge with the sensitivity required (~1 femtoFarad).
I have heard of people using stacks of ribbons together, but I believe that the publication I read regarding this gave false/innaccurate results.
I wonder if anyone has attempted anything similar to this before and could give me an idea of how they went about it.
Regards to all.
Christopher Quinn.
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