stt-mram
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Toshiba goes perpendicular to solve MRAM's power issues, rethink cache memory
As much of a breakthrough as magnetoresistive RAM might be for its ability to retain data while powered off, its susceptibility to leak currents while turned on has made it impractical as a replacement for cache-oriented memory like SRAM. Toshiba's new approach could almost literally turn the situation on its head. By magnetizing spin torque MRAM (ST-MRAM) in a direction perpendicular to the magnetic layer, Toshiba cuts off the avenues for leaks without sacrificing speed. The switch away from in-plane magnetization is an upside for the memory as a whole -- it shrinks normally large elements to below 30 nanometers and cuts the overall power draw of MRAM by about 90 percent. While there's no timetable for when we'll see such cache in a shipping product, Toshiba expects it to reach mobile processors, where even slight power savings can make a big difference. If our next smartphone or tablet survives that much longer on battery through memory we can't even see, we'll know who to thank.
IBM's prototype STT MRAM device spins your bits right round, baby, right round
If you're a frequent reader you're surely well aware of the potential of spin torque transfer memory, or STT-MRAM, and how spin-polarized magnetic currents (and the electrons they love to caress) might hold the potential to revolutionize storage as we know it. If you can't get your noggin around the concepts, know the potential: a new type of memory that will be cheaper, faster, and more efficient than current RAM, while also having the flash-like ability to retain data without power. IBM, who first floated the idea last year, is now sharing some more details about its prototype device that, while only able to store 4Kb of data (roughly half the text of this post in ASCII), is said to be able to retain that for 10 years. There's still no word on when we might be able to buy some of the stuff for our home computers, or when it'll be able to hold something a little more impressive (like maybe a whole post), but we're guessing it'll be well into the next decade before your Three 6 Mafia MP3 collection starts ridin' spinning electrons that don't stop. [Via MRAM-Info]
