Nikitenko V I, Gornakov V S, Shapiro A J, Shull R D, Liu K, Zhou S M, Chien C L
Metallurgy Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Phys Rev Lett. 2000 Jan 24;84(4):765-8. doi: 10.1103/PhysRevLett.84.765.
Real-time magneto-optical indicator film images reveal distinct asymmetry in the motion of a single domain wall in a wedged-NiFe/uniform-FeMn bilayer due to the nucleation and behavior of an exchange spring in the antiferromagnetic layer. Magnetization reversal from the ground state begins at the thick end of the wedge where the exchange anisotropy field (HE) is minimal and the magnetostatic field (HMS) is maximal, whereas reversal into the ground state begins from the thin end where HE is maximal and HMS is minimal.
实时磁光指示剂薄膜图像显示，在楔形镍铁/均匀铁锰双层膜中，由于反铁磁层中交换弹簧的形核和行为，单个畴壁的运动存在明显的不对称性。从基态开始的磁化反转始于楔形的厚端，此处交换各向异性场（HE）最小，静磁场（HMS）最大；而反转回基态则从薄端开始，此处HE最大，HMS最小。
