Field dependence of skyrmion morphology in Cu2OSeO3 and GaV4Se8
Magnetic skyrmions are topological spin textures modulated in two dimensions to form circular particle-like objects. Significant interest in them arises from numerous possible technological applications, such as in computer memory or microwave devices. Recent advances have shown a wide range in magnetic field where Bloch skyrmions in Cu2OSeO3 exist as a metastable state, and where Néel skyrmions exist as the ground state in GaV4Se8. An important fundamental question about the properties of skyrmions is how they distort when the magnetic field is changed, and these advances open up a wide enough field range to study this effect for both Bloch and Néel skyrmions. We propose to study this distortion using small angle neutron scattering by measuring higher order diffraction peaks that will only occur when the modulation of the spin texture becomes non-sinusoidal. These measurements will allow an important comparison of the fundamental properties of the two main types of magnetic skyrmions, informing future research into technological applications.
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CRISANTI Marta; BALAKRISHNAN Geetha; M. T. Birch; CUBITT Robert; HATTON Peter D.; HOLT Samuel; S. H. Moody; STEFANCIC Ales and Murray N Wilson. (2019). Field dependence of skyrmion morphology in Cu2OSeO3 and GaV4Se8. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-516
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