Monday, January 26, 2015
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Motorola Returns To The Chinese Market with Three New Phones
LG Display Buys Rights To Use New OLED Technology
Turkish Court Orders Facebook to Remove Pages Insulting Mohammad
Malaysia Airlines And Russian Dating Sites Topface Websites Hacked
Logitech Introduces Portable Videoconferencing Solution
NVIDIA Comments On GeForce GTX 970 Memory Allocation Reports
Google Comments On Lack Of Security Patches On Older Android Phones
Sony is Offering Old Games To Settle The 2011 PlayStation Network Breach
Active Discussions
Sound card for my Laptop
full screen wide screen
Hi
About the restriction problem of chapter quantity in DVD
Booktype utilities for LiteON and OEM DVD Recorders
downgrade a nero vision 5 project to nero vision 2
what is the minimum burning speed
GSA-4163B and bitsetting
 Home > News > Optical Storage > Data st...
Last 7 Days News : SU MO TU WE TH FR SA All News

Monday, February 03, 2003
Data storage gets ultrasmall with remarkable breakthrough in Electrical Resistance...


Two materials researchers have developed an extremely sensitive nanoscale device that could shrink ultra-high-density storage devices to record sizes. The magnetic sensor, made of nickel and only a few atoms in diameter, could increase data storage capacity by a factor of a thousand or more and could ultimately lead to supercomputing devices as small as a wristwatch. The National Science Foundation (NSF) supported the research.

As stored "bits" of data get smaller their magnetic field gets weaker, making the bits harder to detect and "read." Reliable reading of the data depends on producing a large enough magnetically-induced change in the electrical resistance of the sensor. Producing a detectable change at room temperature is another challenge.

In an experiment at the State University of New York at Buffalo, Harsh Deep Chopra and Susan Hua demonstrated that their tiny sensor produces an unusually large change in resistance in an ultra-small magnetic field, at room temperature. The magnitude of the magnetic effect they created surpasses all previous records. The results will be published in the July 1 issue of Physical Review B.

The effect is based on spintronics, a rapidly growing field that employs not only the charge but also the spin of electrons in making electrical devices.

The current technology used in the heads, or sensors, that read bits from a storage disk is based on an effect called "giant" magnetoresistance (GMR). GMR refers to the change in the sensor resistance when placed in a magnetic field; the effect is typically less than 100 percent. Inside a hard drive, a GMR device senses the local magnetic field of a stored bit of data. Such sensors have enabled commercial hard drives that can store the amount of data contained in a DVD full-length movie in a space the size of a credit card.

The effect created with the new nickel device is called "ballistic" magnetoresistance (BMR) and employs an electrical conductor that is only a few atoms wide and long. The BMR experiment exhibited a record change in sensor resistance of more than 3,000 percent. Chopra predicts the ultimate capacity will be about a terabit per square inch. This could enable the storage of 50 or more DVDs on a hard drive the size of a credit card.

Besides being useful for the multi-billion-dollar data storage industry, the BMR techniques could improve magnetic measurements and the study of magnetic effects in individual atoms, molecules and nanoscale clusters. It could also greatly enhance resolution and sensitivity of scanning probe imaging techniques that are widely used to characterize magnetic materials.


Previous
Next
Ultra-high-density Data Storage May Become Practical With Breakthrough In Nanoscale Magnetic Sensors        All News        Ultra-high-density Data Storage May Become Practical With Breakthrough In Nanoscale Magnetic Sensors
NEC announces the launch of the NEC MultiSpin ND-1300A 4X DVDR Writer!     Optical Storage News      NEC announces the launch of the NEC MultiSpin ND-1300A 4X DVDR Writer!

Source Link Get RSS feed Easy Print E-Mail this Message

Related News
Panasonic To Close DVD-player Factory In Slovakia
Optical Disc Sales Down
DVD And Blu-ray Discs Remain Popular in Britain
DVD CCA Ends Litigation with Kaleidescape
DVD Writer and Media Market Keeps Shrinking
DVD And Blu-ray Discs Remain Preferred Sources of Video Content
DVD FLLC To Run 2013 Market Inspection Tests
DVD6C Lowers Royalty Rates for DVD Read-only Discs
DVD6C Files Lawsuit Against CDI Media
DVD6C Terminates Patent License Agreement with Canadian Premium Disc
Deals, DVDs and Blu-ray Discs Were a Hit With Shoppers Over Black Friday Weekend
CD, DVD Recordable Media Market Down

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2015 - All rights reserved -
Privacy policy - Contact Us .