Comparison of Alternative Techniques for Characterizing Magnetostriction and Inverse Magnetostriction in Magnetic Thin Films

We compare the direct and inverse techniques of measuring magnetostriction in magnetic thin films. We chose a set of four magnetic thin film samples (Co
₉₅
Fe
₅
, Co
₆₀
Fe
₂₀
B
₂₀
, Ni
₆₅
Fe
₁₅
Co
₂₀
, and Ni
₈₀
Fe
₂₀
) for the measurements, representing positive and negative magnetostriction and having saturation magnetostriction of magnitudes ranging from 10
^-7
to 10
^-5
. We made the direct measurements on a high-precision optical cantilever beam system, and we carried out the inverse magnetostriction measurements on a nondestructive inductive
B
-
H
looper with three-point bending stage.