We are using substrates with 12mm x 12mm dimension. However, saturation magnetization of a Co thin film on the 12mm x 12mm substrate was measured as 512 emu/cc, which is much smaller than the reported value.
I was wondering if the entire region is measured or not. I don't think that the entire region (12mm x 12mm) is not measured due to the finite size of pickup coils. It could be the reason for the small saturation magnetization.
Post by Lake Shore Cosmin on May 28, 2021 11:47:17 GMT -5
The sample size should be as close as possible to the calibration sample’s size (3 mm diam sphere). That is why we recommend measuring samples that fit on the sample holder. That means approximately 5x5 mm max for thin films.
You are correct in your assumption that a larger sample's edges will not be detected as well as a “point” sample.
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