| 摘要 |
FIELD: electricity. ^ SUBSTANCE: present invention relates to the physics of magnetism and is meant for investigating the structure of ferromagnetic materials, particularly for providing evidence of "freezing" in the domain pattern of magnetic field lines of permanent magnets, made from ferromagnetic materials. The magneto-parametric generator consists of two magnetically connected thin-walled cylindrical and coaxially located permanent magnets from the analysed ferromagnetic substance, one of which (rotor) is rotated by an electric motor, and the other (stator) is U-shaped. On its magnetic core there is an inductor coil, forming, together with a variable capacitor connected to it, an oscillating circuit, tuned at frequency ë=D/2md, where is frequency of rotation of the cylindrical magnet - rotor with diametre D, m is an integer, the value of which is measured, d is the known cross sectional dimension of the domain in the used ferromagnetic substance. The thickness of the walls of the cylindrical magnets h near magnet gaps is chosen such that it is much less than the diametre D, for example by one or two orders, and in the limit - h=d. ^ EFFECT: possibility of investigating structure and properties of domains of ferromagnetic materials as a function of their magnetisation and effect of different types of external factors on them, particularly their temperature. ^ 4 dwg |
