[en] This work presents the development of a circular single-sheet tester of two-dimensional properties with a 0.5-mm gap. Two circular-shaped magnetizing devices were built. One of them has four magnetic poles and the other has 16 poles. The circular shape allowed turning the devices in relation to the sample and the pick-up coils to verify the influence of magnetizing devices on magnetic measurements. The results showed the advantages of 16 poles and circular magnetizing devices for rotational magnetization research

[en] A method of synthesis of the magnetic systems (MSs) consisting of uniformly magnetized blocks is proposed. This method allows to synthesize MSs providing maximum value of any magnetic field scalar characteristic. In particular, it is possible to synthesize the MSs providing the maximum of a field projection on a given vector, a gradient of a field modulus and a gradient of a field energy on a given directing vector, a field magnitude, a magnetic flux through a given surface, a scalar product of a field or a force by a directing function given in some area of space, etc. The synthesized MSs provide maximal efficiency of permanent magnets utilization. The usage of the proposed method of MSs synthesis allows to change a procedure of projecting in principal, namely, to execute it according to the following scheme: (a) to choose the sizes, a form and a number of blocks of a system proceeding from technological (economical) reasons; (b) using the proposed synthesis method, to find an orientation of site magnetization providing maximum possible effect of magnet utilization in a system obtained in (a). Such approach considerably reduces a time of MSs projecting and guarantees maximal possible efficiency of magnets utilization. Besides it provides absolute assurance in 'ideality' of a MS design and allows to obtain an exact estimate of the limit parameters of a field in a working area of a projected MS. The method is applicable to a system containing the components from soft magnetic material with linear magnetic properties

[en] Rotations of vector B in a square rotational single sheet tester and a round rotational single sheet tester were compared. Two pairs of B coils (45 deg. displaced) were used to control and verify the rotation of vector B at different coil diameters. It was clarified that two sinusoidal induced voltages in B coils do not ensure the rotational flux condition in the area inside the B coils in the sample, especially in a larger measuring region

[en] Present article considers the single axis waves in ferro magnetics and anti ferro magnetics. When a spin wave is excited in an easy-axis anti ferro magnetics, atomic magnetic moments begin to process around the axis of easy magnetization. Atomic magnetic moments of anti ferro magnetics are created, as a rule, by electrons of unfilled shells of ions of transition elements that are part of anti ferro magnets. (author)

[en] The results of studies of the magnetic systems of electrical and medical equipment are presented. The approaches to combined magnetic systems with improved magnetic flux density on the base of the changing magnetization vectors of permanent magnet segments have been proposed and analyzed. It has been shown that the application of combined magnetic systems allows one to realize a homogeneous magnetic field in the inner region of cylindrical-type magnetic systems

[en] We have developed an open-type magnetically shielded room composed of magnetic square cylinders that has been used for an actual MRI in a hospital. To improve shielding performance, we propose here a method to control the path of the magnetic flux in the wall composed of the magnetic square cylinders by changing the magnetic permeability in each direction of the square cylinders spatially. First, we discuss a method to control the magnetic permeability in each direction of the square cylinders independently by inserting slits without changing the outside dimensions of the square cylinders, by using 3-D magnetic field analysis. Then, the effectiveness of the design of controlling the flux pass was shown by magnetic field analysis and experiments. (author)

[en] Unlike conventional ferromagnetic materials such as iron and Supermendur, which produce saturation magnetization fields of approximately 2 T, several of the rare-earth elements (holmium, terbium, erbium, gadolinium, and dysprosium) yield saturated fields of nearly 4 T. This property makes these rare-earth metals particularly attractive as flux concentrators for use in superconducting magnets. This report concerns the use of holmium inserts to enhance the peak useful field of the nominally 12.5-T, 5-cm-bore tape magnet manufactured by the Intermagnetics General Corporation (IGC). Nonlinear magnetostatic analysis indicates that this field increases to nearly 16 T with the rare-earth poles inserted within the bore on both sides of the coil's split-plane radial access gap. This paper focuses on computer modeling methods and experimental results

[en] In the paper are presented both experimental and theoretical basic results of physics of magnetic materials. The special attention is given to a problem of creation of magnetic materials for recording and reproduction of the information. The influence of fundamental scientific results on process of creation of materials with the given properties and constriction of devices and facilities of new generation, and return influence of financing of scientific researches on process of discovering of new unknown fundamental properties of magnetic materials is considered. (author)

[en] X-ray magnetic circular dichroism (XMCD) has the exceptional property of being able to discern between the contributions to the total magnetization of the different elements of a complex sample. This magnetic characterization tool is considered as the best suitable technique to probe the orbital and spin magnetism and to isolate those different contributions separately. XMCD is not only an element but also a shell-specific probe involving the excitation of core-level electrons to unoccupied states of symmetry defined by dipole selection rules for optical transitions. For a magnetic material, XMCD is the difference between the absorption of left and right circularly polarized X-rays. This difference can be correlated to the magnetic moment of the atoms involved in the absorption process using magneto-optical sum-rules under given assumptions regarding the magnetic dipole contribution

No abstract available