Bubble memory

A storage device built using materials such as gadolinium gallium garnet which are can be magnetised easily in only one direction.

A film of these materials can be created so that it is magnetisable in an up-down direction.

The magnetic fields tend to join together, some with the north pole facing up, some with the south.

When a veritcal magnetic field is imposed on this, the areas in opposite alignment to the field shrink to circles, or 'bubbles'.

A bubble can be formed by reversing the field in a small spot, and can be destroyed by increasing the field.

Bubble memory is a kind of non-volatile storage but EEPROM, Flash Erasable Programmable Read-Only Memory and ferroelectric technologies, which are also non-volatile, are faster.

["Great Microprocessors of the Past and Present", V 4.0.0, John Bayko <[email protected]>, Appendix C]

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bubble memory
Intel 8086
non-volatile storage
solid-state storage device
bubble sort
bucky bits
buffered write-through
buffer overflow