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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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