The Theory of Cylindrical Magnetic Domains

摘要: The theory of cylindrical magnetic domains provides conditions governing the size and stability circular in plates uniaxial materials together with an estimate range applicability these conditions. results are directly applicable to design domain devices. Computation first second order energy variation resulting from general small deviation shape initially yields stability. physical origin various terms expansion is examined detail. A graph which many properties may be obtained summarizes calculation. minimum theoretically attainable diameter approximately σ w /πM2 s , where wall density M saturation magnetization. For exist, effective anisotropy field must greater than 4πM .