Vibrational magnetometry and small‐angle magnetization rotation methods have been used to study magnetoelastic properties of glass‐coated Co‐rich microwires of composition Co69Fe4Cr4Si12B11 with metallic nucleus diameter d = 55 μm and total diameter D = 80 μm. The saturation wire magnetization has been found to be Ms = 590 emu cm−3, the magnetostriction constant λs = −0.49 × 10−7, and the bare anisotropy field Ha = 0.24 Oe. The average value of the residual quenching stress has been estimated to be Δσ ≈ 137 MPa. The diagonal Zφφ component of the giant magnetoimpedance tensor turns out to be significantly dependent on the position along the wire axis. This can be attributed to a non uniformity of the residual stress distribution. It is shown that the measurement of the magnetic characteristics of the microwire enables one to estimate quantitatively the magnitude of the applied mechanical stress.
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