A finite element based real-space phase field model for domain evolution   of ferromagnetic materials

doi:10.1016/j.commatsci.2016.03.020

CORC > 北京大学 > 工学院

	A finite element based real-space phase field model for domain evolution of ferromagnetic materials
	Zhang, Honglong ; Zhang, Xiaoyu ; Pei, Yongmao
刊名	COMPUTATIONAL MATERIALS SCIENCE
	2016
关键词	Phase field model Finite element method The demagnetizing field Domain evolution Vortex chirality High density memory THIN-FILMS MICROMAGNETICS SIMULATION REVERSAL STRESS
DOI	10.1016/j.commatsci.2016.03.020
英文摘要	This paper proposes a real-space phase field model solved by finite element method for giant magnetostrictive materials. The model is based on the thermodynamic theory of ferromagnetic materials and employs the time-dependent Ginzburg-Laudau (TDGL) equation to predict the domain evolution process. We have derived the corresponding finite element formulation which takes the mechanical displacement, the magnetic potential, and the magnetization vector as the field variables, according to variational principle. A multi-field coupling finite element has been developed through the ABAQUS user element subroutine module to simulate the coupling between mechanical and magnetic characteristics for microstructures with arbitrary geometries and boundary conditions. The simulation results of a general magnetic nanoring coincide well with the reports in literature, which confirms the validity of the phase field method developed. The magnetization processes have also been investigated for nanorings with different geometries. The results suggest that the vortex chirality and multi-stable magnetization states can be controlled by changing both the symmetry of loading situation and the geometrical configuration. The phase field model solved by finite element method is expected to be a useful tool for the design of high density magnetic random access memories. (C) 2016 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [11522214, 11090330, 11090331]; National Programs for Scientific Instruments Research and Development of China [2012YQ03007502]; Beijing Nova Program [Z151100000315041]; SCI(E); EI; ARTICLE; peiym@pku.edu.cn; 214-223; 118
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437202]
专题	工学院
推荐引用方式 GB/T 7714	Zhang, Honglong,Zhang, Xiaoyu,Pei, Yongmao. A finite element based real-space phase field model for domain evolution of ferromagnetic materials[J]. COMPUTATIONAL MATERIALS SCIENCE,2016.
APA	Zhang, Honglong,Zhang, Xiaoyu,&Pei, Yongmao.(2016).A finite element based real-space phase field model for domain evolution of ferromagnetic materials.COMPUTATIONAL MATERIALS SCIENCE.
MLA	Zhang, Honglong,et al."A finite element based real-space phase field model for domain evolution of ferromagnetic materials".COMPUTATIONAL MATERIALS SCIENCE (2016).