03-09-2012, 11:08 AM
MRAM
MRAM.pptx (Size: 1.14 MB / Downloads: 37)
Ideal Memory Qualities
Nonvolatility
Programmability : read and write
High endurance >1013 cycles
Long data retention > 10 years
High switching speed
Low standby current < 1mA
Ferromagnetism
Matter contains positive and negative charges which in general are in equal numbers.
In addition to charge, electrons also have an inherent property called spin, either up or down.
In general most matter has
equal numbers of spin up
and spin down electrons
which cancel any effect.
Ferro magnets are materials where there is a net spin. This tendency of electron spins to align with one another
Magnetoresistance
This is the observable change in electrical resistivity
when a magnetic field is present.
Two of the most useful types of Magnetoresistance are;
Giant Magnetoresistance
Tunneling Magnetoresistance
MRAM.pptx (Size: 1.14 MB / Downloads: 37)
Ideal Memory Qualities
Nonvolatility
Programmability : read and write
High endurance >1013 cycles
Long data retention > 10 years
High switching speed
Low standby current < 1mA
Ferromagnetism
Matter contains positive and negative charges which in general are in equal numbers.
In addition to charge, electrons also have an inherent property called spin, either up or down.
In general most matter has
equal numbers of spin up
and spin down electrons
which cancel any effect.
Ferro magnets are materials where there is a net spin. This tendency of electron spins to align with one another
Magnetoresistance
This is the observable change in electrical resistivity
when a magnetic field is present.
Two of the most useful types of Magnetoresistance are;
Giant Magnetoresistance
Tunneling Magnetoresistance