CONTROLLABLE STATE CONVERSIONS FOR S=1 BUBBLE DOMAINS
CONTROLLABLE STATE CONVERSIONS FOR S=1 BUBBLE DOMAINS A technique for controllably providing state conversions between bubble domains having a common winding number S is described. In particular, controlled conversions between bubble domains having winding number S=1 is achieved by the application o...
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Main Authors | , , |
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Format | Patent |
Language | English French |
Published |
24.03.1981
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Subjects | |
Online Access | Get full text |
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Summary: | CONTROLLABLE STATE CONVERSIONS FOR S=1 BUBBLE DOMAINS A technique for controllably providing state conversions between bubble domains having a common winding number S is described. In particular, controlled conversions between bubble domains having winding number S=1 is achieved by the application of spatially invariant, homogeneous magnetic fields. For the conversion of .sigma. bubbles (having two vertical Bloch lines) to X bubbles (having no vertical Bloch lines), an in-plane field is not required and only a time varying perpendicular z-field is used. For conversion of a X+ bubble to a Xbubble, and vice versa, a time varying field pulse is applied, there being no requirement for an in-plane magnetic field. However, for the conversion of X bubbles to .sigma. bubbles, an in-plane field is used simultaneously with a time varying z-field. For all controlled conversions, the applied magnetic fields do not have spatial gradients. The magnitudes of the applied magnetic fields and the rise and fall times of the z field are controlled within certain ranges in order to have controlled conversion of one state to another. |
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Bibliography: | Application Number: CA19770278854 |