Bloch Point in the Domain Wall of a Cylindrical Ferromagnetic Nanowire as a Harmonic Oscillator: Classical and Quantum Properties

The oscillatory properties (both classical and quantum ones) of the Bloch point (BP) in the domain wall of a cylindrical ferromagnetic nanowire are reviewed. Based on the presented results, it is concluded that BP can be considered as a harmonic oscillator. In this case, the quantum oscillations of BP are a type of magnetic macroscopic quantum effect that occurs in nickel and iron nanowires at liquid-helium temperatures. It is shown the transformation of the BP wave packet into beat that ensures the transfer of the quantum-oscillator energy. The presented results are of particular interest in the context of the development of up-to-date nanotechnologies based on the physical properties of cylindrical ferromagnetic nanowires, the magnetic structure of which is characterised by the domain wall with BP.