At the time of Brown's graduation from Cornell, the theory for magnetic domains was not very developed.
Several areas of research, including fields like phase change memory, may provide the opportunity to move away from both magnetic domains and transistors.
The process of stopping, reducing and reversing the current will leave the magnetic domains randomized.
In magnetism, a domain wall is an interface separating magnetic domains.
Grains help solve this problem because each grain is in theory a single magnetic domain (though not always in practice).
These can divide the fluid into magnetic domains, inside of which the currents are relatively weak.
The information on a hard disk is stored in extremely small magnetic domains compared to a cassette tape's.
This effect is widely used in research, and physics education as a simple experiment to demonstrate the reality of magnetic domains.
Reducing this energy is the main reason for the creation of magnetic domains.
This works by agitating the magnetic domains to reduce reluctance in the iron band.