Abstract
Identification and characterization of novel magnetic states is a topic of research in modern magnetic science. The control of the surface and volume magnetization states in cylindrical microwires with the giant magnetoimpedance effect earlier has been reached. Herein, we demonstrate difference and similarity of the elliptic and spiral structures. The effects of inner and surface migration of spiral magnetic domains in a microwire are demonstrated using the magneto-optical Kerr technique. The main properties of the inclined spiral structures were recognized. The surface domain structure has a length limited only by real sample length. The external torsion stress and electric current are the main tools permitted the fine transformation between spiral to elliptical structure. Based on a model supposing distribution of the mechanic stress inside the microwire, hysteresis and magnetic images were simulated. The results of the simulation are consistent with the experiment. An interpretation of the experimental results is proposed in terms of the formation and transformation of the spiral magnetic domain structure.
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