Time resolved scanning Kerr microscopy of hard disk writer structures with a multilayered yoke.

Authors :: Yu, W.
Gangmei, P.
Keatley, P. S.
Hicken, R. J.
Gubbins, M. A.
Czoschke, P. J.
Lopusnik, R.
Source :: Applied Physics Letters. 4/22/2013, Vol. 102 Issue 16, p162407-162407-4. 1p. 2 Diagrams, 3 Graphs.
Publication Year :: 2013
Abstract: Partially built hard disk writer structures with a multilayered yoke formed from 4 repeats of a NiFe(∼1 nm)/CoFe(50 nm) bilayer were studied by time and vector resolved scanning Kerr microscopy. Dynamic images of the in-plane magnetization suggest an underlying closure domain equilibrium state. This state is found to be modified by application of a bias magnetic field and also during pulse cycling, leading to different magnetization rotation and relaxation behavior within the tip region. [ABSTRACT FROM AUTHOR]

Subjects :: *DATA disk drives
*FERROMAGNETISM
*PULSE circuits
*MAGNETIZATION
*MAGNETIC fields

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