Probing magnetic anisotropy effects in epitaxial CrO2 thin films
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چکیده
The magnetic anisotropy in ferromagnetic chromium dioxide thin films (Tc;393 K) grown epitaxially on ~100! TiO2 substrates, is probed using precise rf transverse susceptibility (xT) measurements. Singular peaks in xT are observed that are associated with the anisotropy (6HK) and switching (6Hs) fields in CrO2. Theoretical calculations of xT based on a simple coherent rotation model display remarkable agreement with the experimental data, indicating that these thin films behave like single-domain magnetic particles. Magnetoelastic contributions to the total anisotropy energy are needed to describe the evolution of xT peaks at lower temperatures.
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تاریخ انتشار 2000