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High wall and bubble velocities have been observed in garnet films having a strong orthorhombic anisotropy. This anisotropy is induced by compressive misfit stress in garnets containing Mn3+ ions. The magnetostatics of bubbles in these orthorhombic materials differs from that in uniaxial materials, e.g., no hard bubbles have been observed for large in-plane anisotropies. Under certain conditions automotion of bubbles has been observed indicating that vertical Bloch lines may be present. Wall mobilities of 55 m s−1Oe−1 and velocities up to 1400 m s−1 have been observed. The possibilities for small bubble diameter applications will be shown.
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Breed et al. (1980) studied this question.
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