Magnetostatic energy F_m causes the essential contribution to the total balance of free energy F in ferromagnetic [1-3]. The role of energy F_m in formation of domain structure (DS) and magnetic properties of polycrystalline materials is especially great [3-5]. In the present work the results of computation by the micromagnetism theory of energy F_m and magnetostatic fields Hm of periodic DS, formed near GB in plates of polycrystalline ferromagnetics of silicon iron type (~3%Si) with a surface plane (011) in a demagnetized state (H^e=0) are discussed. The obtained values of F^*_m and H^*_m, in materials with enough considerable constant of a magnetocrystalline anisotropy (K₁=10³-10⁶ J/m³), are 6-8 times lower, than for before discussed values of F_m and H_m [2,3]. Character of studied states is the presence of areas with the inhomogeneous magnetization (divM_s≠0) inside grains, instead of magnetization jumps (ΔM^GB_n=0) on GB surfaces. The main reason of their formation is the tendency to the energy Fm minimum, and the realization mechanism is deviations of M_s vectors inside domains from easy axes under the influence of magnetostatic fields H_m created by GB. Opportunities of use of the received results for the solution of problems which concern the development and application of magnetic materials and composites are discussed.

[1] L. Landau, E. Lifshitz, Phys. Z. Sowjetunion 8, 153-169 (1935)

[2] H.J. Williams, R.M. Bozorth, W. Shokley, Phys. Rev. 75(1), 155 (1949)

[3] A. Hubert, R. Schafer Magnetic domain: the analysis of magnetic microstructures. Springer. Berlin. 1998. 696 p.

[4] L. Sheko, G. Brekharya, A. Sadovoy, O. Kulyk, I. Pisanko, JMMM V. 215-216 pp. 24-26 (2000)

[5] L. Sheko, A. Sadovoy, O. Kulyk, Phys. Metallov and Metallography V. 94, №3, 59-65 (2002)

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/3512 must be provided.

1. Magnetostatic effect of the change in the shape of 180^o domain walls near grain boundaries in plates of triaxial ferromagnets of the Fe-3% Si-alloy type