Control of magnetic domain walls in nanowires of strongly correlated electron material

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We performed in situ Lorentz microscopic observation of ferromagnetic perovskite-type manganite nanowires with the magnetic field applied to control the chirality of magnetization distribution of the magnetic domain walls. The chirality of vortex walls was controlled by the direction of external magnetic field in alternating current demagnetization. The chirality of transverse walls formed at the same pinning site was reversed by the reversal of the magnetization direction of separated domains.