Effect of inhomogeneous mechanical tensions on domain structure of iron borate

Full text: The effect of inhomogeneous radially directed mechanical tensions on domain structure, magnetic susceptibility and magnetic hysteresis loops of FeBO3 single crystal has been studied by the magnetooptical method. It has been found that in the magnetic field applied to the basic plane of FeBO3 along the direction of the tension vector in the process of magnetization a system of wedge-shaped domains appears; this system exists within the temperature-dependent range of fields . It has been established that this system of wedge-shaped domains has a significant impact on the process of technical magnetization of tensioned crystals. The results obtained are discussed in the framework of the domain structure theory. It has been shown that the theoretical model allows description the experimentally obtained temperature and field dependencies D/ (D is the mean width of a wedge-shaped domain, L is its length). The calculated value D is approximately 1.3 times less then the widths of the observed domains. (authors)