Dynamic micromagnetic simulation of the configurational anisotropy of nanoelements

Author

Fidler, Josef ; Schrefl, Thomas ; Süss, Dieter ; Scholz, Werner

Author_Institution

Inst. of Appl. & Tech. Phys., Vienna Univ. of Technol., Austria

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2058

Lastpage

2060

Abstract

A finite element method was used to simulate the magnetization reversal of nanostructured Ni₈₀Fe₂₀ elements with zero anisotropy. The numerical results show a strong influence of the size of the cubic and platelet shaped (square and triangular) elements on the switching field. The calculated switching fields range from μ ₀H=0.002 to 0.6 T. Differences of the demagnetizing field which arise when the field is applied in different directions lead to configurational anisotropy effects. Platelet shaped elements show identical switching behavior in different directions within the platelet plane. Inhomogeneous magnetization reversal processes become dominant with increasing element size ⩾100 nm and strongly influence the switching behavior

Keywords

demagnetisation; finite element analysis; iron alloys; magnetic storage; magnetic switching; magnetisation reversal; nanostructured materials; nickel alloys; 0.002 to 0.6 T; 100 nm; Ni₈₀Fe₂₀; NiFe; configurational anisotropy; configurational anisotropy effects; demagnetizing field; dynamic micromagnetic simulation; finite element method; magnetization reversal processes; nanoelements; platelet shaped elements; size ⩾100 nm; switching fields; Anisotropic magnetoresistance; Finite element methods; Magnetic anisotropy; Magnetic switching; Magnetization reversal; Magnetostatics; Magnets; Micromagnetics; Perpendicular magnetic anisotropy; Polarization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951052

Filename

951052