debasis sadhukhan m.sc. physics dept. of physics iit bombay
TRANSCRIPT
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- Debasis Sadhukhan M.Sc. Physics Dept. of Physics IIT Bombay
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- 1. Magnetic Hard drives relies on the mechanical rotation of a disk 2. Energy consuming 3. Slow
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- Solve the problem with HDD. But 1. 100 times faster. 2. But Costly. 3. lose their data when the computer powers down or crashes
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- 1. Scaling devices in two dimension getting Saturated. 2. One day, it will not work any further. 3. We need to find alternative way.
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- * Why it is called Racetrack? * Racetrack because we are going to have magnetic nanowires that will contain magnetic domain like little race cars. * We are going to move the race cars (i.e. the magnetic domains) up and down which stand above a silicon wafer
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- * We need to put the information bit i.e. 0,1 in to the nanowire. * The magnetic domain can be Spin Up or Spin Down. * Lets say, Up represents 0 and Down presented 1.
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- * By flowing the current of spin-polarized electrons i.e. spin angular moments, we can manipulate the magnetic domain in a racetrack. * That is how we are going to shift information in the nanowires using nanosecond long pulses of spin-polarized currents.
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- * The currents will keep arise into a torque in each of the domain walls and cause them to move all in same direction. * That how we have produced a moving three dimensional memory without any energy loss.
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- * We bring the information down in the surface of Silicon wafer, where we have all means of deleting and writing information into the nanowires. * After writing, we raise the information in the top (away from the Si wafer surface)
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- * Each racetrack, having single reading and writing devices, gives us the opportunity to store multiple bits of information * With no moving part, * No moving atoms & * No moving cost.
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- * If the Racetrack Memory is successful, then it is going to replace the diskdrives and some of the conventional memory ( in fact most of them). * We can build a computer that are more compact, consume much less energy and will be slightly useful than our current computer. * This can change not only the memory industry but bring a revolution to computation industry
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