Open AccessMagnetization reversal of perpendicularly orientated Nd2Fe14B/α-Fe trilayer
Author(s) -
Xian Cheng-Wei,
Guoping Zhao,
Qingxiang Zhang,
Xu Jinsong
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.3509
Subject(s) - coercivity , nucleation , condensed matter physics , materials science , perpendicular , hysteresis , demagnetizing field , field (mathematics) , phase (matter) , magnetic hysteresis , magnetization , magnetic field , physics , thermodynamics , geometry , mathematics , quantum mechanics , pure mathematics
The full magnetization reversal process of perpendicular orientated Nd2Fe14B/α-Fe trilayer has been investigated by using a micromagnetic method. Both nucleation and pinning fields as well as hysteresis loops have been calculated reliably as functions of s soft layer thickness. In addition, detailed comparison between our results and experimental data has been done. With the demagnetization energy considered, the nucleation field of perpendicular by orientated case is lower than the parallel one and the nucleation occus before the reversal of the applied field. For small s, the theoretical coercivity equals to the nucleation field it equals to pinning filed also. As the thickness of the soft phase increases, the coercivity mechanism changes from nucleation to pinning. For large s, however, the coercivity is slightly smaller than the pinning field.