skip to main content

Title: Prediction method of basic domain structure in Fe3%Si(110) single crystal with grooved surface

This paper proposes the method to accurately predict the 180° basic domain width (D{sub w}) in demagnetized states of the grooved Fe3%Si(110) single crystal with the tilt angle of [001] out of the sheet surface (β). The evaluation of D{sub w} enables the estimation of the anomalous eddy current losses. In this paper, D{sub w} is optimized to minimize the magnetic Gibbs free energy represented by vector potentials using the finite element method and the conjugate gradient method. The μ*-method is adopted to approximate the magnetization relaxation. The stray field energy generated by the magnetic charges occurring on both grooves cross section and sheet surfaces is considered in our proposed method. The validity of the proposed method was confirmed by comparison with the observed D{sub w}. As a result, we could reveal the β dependence of D{sub w} against the groove depth. Moreover, the theoretical threshold of the domain refinement due to the grooves has been suggested.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Advanced Technology Research Laboratories, Nippon Steel and Sumitomo Metal Corporation, Futtsu, Chiba 293-8511 (Japan)
  2. (Japan)
  3. Yawata R and D Laboratories, Nippon Steel and Sumitomo Metal Corporation, Tobata, Kitakyushu, Fukuoka 804-8501 (Japan)
  4. Steel Research Laboratories, Nippon Steel and Sumitomo Metal Corporation, Futtsu, Chiba 293-8511 (Japan)
  5. Research Institute of Electrical Communication, Tohoku University, Aoba, Sendai 980-8577 (Japan)
Publication Date:
OSTI Identifier:
22273737
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; APPROXIMATIONS; COMPARATIVE EVALUATIONS; CROSS SECTIONS; CRYSTAL STRUCTURE; DOMAIN STRUCTURE; EDDY CURRENTS; FINITE ELEMENT METHOD; FREE ENTHALPY; IRON SILICIDES; MAGNETIZATION; MONOCRYSTALS; POTENTIALS; RELAXATION; SURFACES