Featured Research

from universities, journals, and other organizations

University At Buffalo Materials Researchers Develop Device For "Ultrasmall" Data Storage

Date:
June 27, 2002
Source:
University At Buffalo
Summary:
Two University at Buffalo materials researchers have developed an extremely sensitive nanoscale device that could shrink ultra-high-density storage devices to record sizes.

BUFFALO, N.Y. -- Two University at Buffalo 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 measuring only a few atoms in diameter, could increase data storage capacity by a factor of a 1,000 or more and ultimately could lead to supercomputing devices as small as a wristwatch, according to Harsh Deep Chopra, associate professor of mechanical and aerospace engineering, and Susan Hua, research associate professor of mechanical and aerospace engineering, in the UB School of Engineering and Applied Sciences.

The National Science Foundation (NSF) and U.S. Department of Energy supported their 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 UB, Chopra and 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.


Story Source:

The above story is based on materials provided by University At Buffalo. Note: Materials may be edited for content and length.


Cite This Page:

University At Buffalo. "University At Buffalo Materials Researchers Develop Device For "Ultrasmall" Data Storage." ScienceDaily. ScienceDaily, 27 June 2002. <www.sciencedaily.com/releases/2002/06/020627001423.htm>.
University At Buffalo. (2002, June 27). University At Buffalo Materials Researchers Develop Device For "Ultrasmall" Data Storage. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2002/06/020627001423.htm
University At Buffalo. "University At Buffalo Materials Researchers Develop Device For "Ultrasmall" Data Storage." ScienceDaily. www.sciencedaily.com/releases/2002/06/020627001423.htm (accessed October 22, 2014).

Share This



More Matter & Energy News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) — Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) — Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) — As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com
What Is Magic Leap, And Why Is It Worth $500M?

What Is Magic Leap, And Why Is It Worth $500M?

Newsy (Oct. 22, 2014) — Magic Leap isn't publicizing much more than a description of its product, but it’s been enough for Google and others to invest more than $500M. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins