Nonlinear conjugate gradient methods in micromagnetics
Source abstract
Abstract
Conjugate gradient methods for energy minimization in micromagnetics are compared. The comparison of analytic results with numerical simulation shows that standard conjugate gradient method may fail to produce correct results. A method that restricts the step length in the line search is introduced, in order to avoid this problem. When the step length in the line search is controlled, conjugate gradient techniques are a fast and reliable way to compute the hysteresis properties of permanent magnets. The method is applied to investigate demagnetizing effects in NdFe12 based permanent magnets. The reduction of the coercive field by demagnetizing effects is μ0ΔH = 1.4 T at 450 K.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic Properties and Applications · Magnetic Properties of Alloys · Piezoelectric Actuators and Control
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Danube University Krems 1 Center for Integrated Sensor Systems, , 2700 Wiener Neustadt, Austria
University of Vienna 2 Faculty of Mathematics, , Vienna, 1090 Wien, Austria
TU Wien 3 Institute for Solid State Physics, , 1040 Wien, Austria
TU Wien 4 CD-Laboratory for Advanced Magnetic Sensing and Materials, , 1040 Vienna, Austria
Toyota Motor Corporation 5 , 1200 Mishuku, Susono, Shizuoka 410-1193, Japan
Technology Research Association of Magnetic Materials for High-efficiency Motors (Mag-HEM) Higashifuji-Branch 6 , 1200 Mishuku, Susono, Shizuoka 410-1193, Japan
Funding
Austrian Science Fund · New Energy and Industrial Technology Development Organization
References (41)
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