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Bloch line propagation with Co-Pt bit patterns in stripe domains confined by grooves

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3 Author(s)
Fujimoto, K. ; Hitachi Ltd., Tokyo, Japan ; Maruyama, Y. ; Suzuki, R.

Bloch Line (BL) pair propagation using a field-access scheme has been investigated in the straight pair of stripe domains stabilized around completely etched grooves. Potential wells to define the bit position for the BL pairs were produced by the stray field from Co-Pt thin-film patterns with high coercivity. By applying a series of asymmetric triangular bias pulsed fields, a BL pair was propagated at 500 kHz with a 14% bias field margin. At 1 MHz, however, the bias field margin was only 7%. This reduction was due to the long relaxation time of the domain walls. The drive field margins depended on the orientation of the propagation direction relative to the magnetized direction of the Co-Pt bit patterns. This dependence became small when the in-plane bias field was decreased

Published in:

Magnetics, IEEE Transactions on  (Volume:28 ,  Issue: 6 )

Date of Publication:

Nov 1992

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