News tagged with magnetic field sensors
An unlikely route to ferroelectricity
(Phys.org) -- Ferroelectricity, which was first observed in the 1940s, is an interesting phenomenon involving the spontaneous (non-induced) formation of charge polarization (separation of charge) in certain ...
May 18, 2012 |
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Hall effect magnetic field sensors for high temperatures and harmful radiation environments
Toyohashi Tech researchers have fabricated Hall effect magnetic field sensors operable at least 400 C and in extreme radiation conditions using gallium nitride-based heterostructures a with two-dimensional ...
Mar 22, 2012 |
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Tongue drive system goes inside the mouth to improve performance and user comfort
The Tongue Drive System is getting less conspicuous and more capable. Tongue Drive is a wireless device that enables people with high-level spinal cord injuries to operate a computer and maneuver an electrically ...
Feb 20, 2012 |
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Study of switching behavior in differential dual spin valves reveals the role of interlayer couplings
Spin valves are essential building blocks in the magnetic sensors of read heads in hard disk drives. They consist of two magnetic layers separated by a non-magnetic layer and act as valves for electrons depending ...
Dec 12, 2011 |
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Magnetic field sensors for monitoring heart and brain activity developed
High sensitivity magnetic sensors are important in medical diagnostics for applications such as monitoring heart and brain activities, where mapping distributions of localized extremely weak magnetic fields ...
Sep 02, 2011 |
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Self-assembly and chains of rotating magnetic particles
Dr. Park and colleagues report on a new biosensing protocol based on monitoring changes in optical transmittance of a solution containing self-assembled chains of functionalized magnetic beads being rotated ...
Nanotechnology / Bio & Medicine
Oct 26, 2010 |
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New mini-sensor traces faint magnetic signature of human heartbeat
Researchers from the National Institute of Standards and Technology (NIST) and the German national metrology institute have used NIST's miniature atom-based magnetic sensor to successfully track a human heartbeat, ...
Oct 14, 2010 |
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Record measurement of extremely small magnetic fields
Researchers at the research center QUANTOP at the Niels Bohr Institute at the University of Copenhagen (Denmark) have constructed an atomic magnetometer, which has achieved the highest sensitivity allowed ...
Apr 12, 2010 |
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Researchers suggest new memory storage mineral
(PhysOrg.com) -- Researcher Derek Stewart says the mineral kotoite could be an ideal insulator for memory storage devices called magnetic tunnel junctions.
Nanotechnology / Nanomaterials
Jan 21, 2010 |
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Magnetic field measurements of the human heart at room temperature
A new optical sensor developed by the American National Institute of Standards and Technology was successfully tested by the Physikalisch-Technische Bundesanstalt (Germany) in the "magnetically best shielded ...
Dec 11, 2009 |
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Birds 'See' Earth's Magnetic Field
When birds migrate over long distances -- sometimes thousands of miles -- they usually end up in exactly the same place year after year. Such accurate feats of navigation, accomplished by millions of birds ...
Nov 16, 2009 |
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Magnetic mixing creates quite a stir (w/ Video)
Sandia researchers have developed a process that can mix tiny volumes of liquid, even in complicated spaces.
Oct 27, 2009 |
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Clinical trial shows quadriplegics can operate powered wheelchair with tongue drive system
An assistive technology that enables individuals to maneuver a powered wheelchair or control a mouse cursor using simple tongue movements can be operated by individuals with high-level spinal cord injuries, ...
Medicine & Health / Medical research
Jul 06, 2009 |
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Quantum cat's 'whiskers' offer advanced sensors
(PhysOrg.com) -- A team led by Oxford University scientists has turned one of the key problems with quantum entangled systems - that they are easily ‘disturbed’ by their environment - into an advantage which ...
Apr 24, 2009 |
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