Nonlinear conjugate gradient methods in micromagnetics

被引：40

作者：

Fischbacher, J. ^{[1
]}

Kovacs, Alexander ^{[1
]}

Oezelt, Harald ^{[1
]}

Schrefl, T. ^{[1
]}

Exl, L. ^{[2
,3
]}

Fidler, J. ^{[3
]}

Suess, D. ^{[4
]}

Sakuma, N. ^{[5
,6
]}

Yano, M. ^{[5
,6
]}

Kato, A. ^{[5
,6
]}

Shoji, T. ^{[5
,6
]}

Manabe, A. ^{[6
]}

机构：

[1] Danube Univ Krems, Ctr Integrated Sensor Syst, A-2700 Wiener Neustadt, Austria

[2] Univ Vienna, Fac Math, A-1090 Vienna, Austria

[3] TU Wien, Inst Solid State Phys, A-1040 Vienna, Austria

[4] TU Wien, CD Lab Adv Magnet Sensing & Mat, A-1040 Vienna, Austria

[5] Toyota Motor Co Ltd, 1200 Mishuku, Susono, Shizuoka 4101193, Japan

[6] Technol Res Assoc Magnet Mat High Efficiency Moto, Higashifuji Branch, 1200 Mishuku, Susono, Shizuoka 4101193, Japan

来源：

AIP ADVANCES | 2017年 / 7卷 / 04期

基金：

奥地利科学基金会;

关键词：

D O I：

10.1063/1.4981902

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 mu(0)Delta H = 1.4 T at 450 K. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：13

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