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About RF Cafe
Copyright: 1996 - 2024 BSEE - KB3UON RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived... All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowl My Hobby Website: |
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Magnetoresistance - Fodder for Micro Hard Drives
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 Magnetoresistance - Fodder for Micro Hard Drives Researchers at SUNY, Buffalo, NY, have revealed the potential of an effect known as "ballistic magnetoresistance," whereby applying atomic-dimension "nanocontacts" to magnetic media resulted in a 3,000% change in magnetoresistance at low switching fields of a few hundred oersted. This has the potential to increase hard drive storage densities from GBits/in² to TBits/in². Interior magnetic-domain walls measure about 1 nm vs. 100 to 200 nm for a normal conductor. Electrons forced through such a small conduit literally do not have space to bounce around inside the conductor and producing heat. With a nanocontact's 1 nm wide domain walls, electrons stream through, creating a draft-like effect that prompted the label "ballistic." Look for thumbnail-size hard drives in about a decade. |
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