We use the dipolar fields from a magnetic cantilever tip to generate localized spin wave precession modes in an in-plane magnetized, thin ferromagnetic film. Multiple resonances from a series of localized modes are detected by ferromagnetic resonance force microscopy and reproduced by micromagnetic models that also reveal highly anisotropic mode profiles. Modeled scans of line defects using the lowest-frequency mode provide resolution predictions of (94.5±1.5) nm in the field direction, and (390±2) nm perpendicular to the field.

We use ferromagnetic-resonance force microscopy to spectroscopically image the edge modes in individual 700 nm and 400 nm wide Permalloy stripes with a spatial resolution on the order of 200 nm. The imaging clearly identifies some resonances as edge modes in stripes in a case where mode identification by comparison with micromagnetic modeling is not clear. Combined spectroscopic and spatial scans reveal clear differences in the edge mode resonances at opposite edges of the stripes as well as inhomogeneity along the length of the stripe.

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Fe 0.1 Sc 0.9 N with a thickness of ~ 380 nm was grown on top of a ScN(001) buffer layer of ~ 50 nm, grown on MgO(001) substrate by radio-frequency N-plasma molecular beam epitaxy (rf-MBE). The buffer layer was grown at T S ~ 800 o C, whereas the Fe 0.1 Sc 0.9 N(001) film was grown at T S ~ 420 °C. In-situ reflection high-energy electron diffraction measurements show that the Fe 0.1 Sc 0.9 N film growth starts with a combination of spotty and streaky pattern [indicative of a combination of smooth and rough surface]. After ~ 10 minutes of growth, the pattern converts to a spotty one [indicative of a rough surface]. Towards the end of the Fe 0.1 Sc 0.9 N film growth, the spotty pattern transforms into even spottier, but also ring-like indicating a polycrystalline behavior. Superconducting quantum interference device magnetic measurements show a ferromagnetic to paramagnetic transition of T C ~ 370 -380 K. We calculated a magnetic moment per atom of µ (Fe 0.1 Sc 0.9 N) = 0.037 Bohr magneton/ Fe-atom. Based on the carrier concentration measurements (n S (Fe 0.1 Sc 0.9 N) = 2.086 × 10 19 /cm 3 ), we find that iron behaves as an acceptor. Comparisons are made with similar MnScN (001)/ScN(001)/MgO(001) system.