News tagged with magnetic polarity
Enceladus plume is a new kind of plasma laboratory
(Phys.org) -- Recent findings from NASA's Cassini mission reveal that Saturn's geyser moon Enceladus provides a special laboratory for watching unusual behavior of plasma, or hot ionized gas. In these recent ...
Space & Earth / Space Exploration
May 31, 2012 |
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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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Origin of large polarization in multiferroic YMnO3 thin films
Multiferroic materials have attracted much interest because of their ability to control magnetism through the application of a voltage. This ability can be utilized to reduce the power required by electronic ...
Feb 16, 2012 |
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A new way to measure Earth's magnetosphere
US researchers have demonstrated the potential use of a new way to measure properties of Earth's magnetosphere, the magnetic bubble that surrounds the planet.
Space & Earth / Earth Sciences
Jan 04, 2012 |
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2012: Magnetic pole reversal happens all the (geologic) time
Scientists understand that Earth's magnetic field has flipped its polarity many times over the millennia. In other words, if you were alive about 800,000 years ago, and facing what we call north with a magnetic ...
Space & Earth / Earth Sciences
Nov 30, 2011 |
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Ultrafast substorm auroras explained (w/ video)
(PhysOrg.com) -- From time to time, sudden releases of energy in Earth's magnetosphere lead to major disturbances that result in bright auroral displays over the planet's polar regions. These auroras are caused by a phenomenon ...
Sep 06, 2011 |
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Locating the elusive: Scientists observe how material at room temperature exhibits 'multiferroic' properties
German researchers at Helmholtz-Zentrum Berlin (HZB) in close collaboration with colleagues in France and UK, have engineered a material that exhibits a rare and versatile trait in magnetism at room temperature. ...
Aug 22, 2011 |
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New X-ray microscopy technique images magnetic nanostructure
A new X-ray technique for producing instantaneous nanoscale images of the magnetic polarity in materials has been demonstrated by SLAC scientist Joshua Turner. Such a capability is important for understanding ...
Aug 05, 2011 |
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Physicists rotate beams of light
Controlling the rotation of light – this amazing feat was accomplished at the Vienna University of Technology (TU Vienna), by means of a ultra thin semiconductor. This can be used to create a transistor ...
Apr 05, 2011 |
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Researchers use spin waves to measure magnetic polarization of electrical current
In the hard drive industry, the rapid growth of storage density has been propelled in part by developments in the sensors used to read the magnetic "bits" on the disk. Recently, the use of giant magnetoresistance (GMR) in ...
Mar 08, 2011 |
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Vikings could have steered by polarized light
(PhysOrg.com) -- The Vikings are said to have been able to navigate with the aid of "sunstones" that allowed them to see the sun on cloudy or foggy days. Now scientists in Hungary and Sweden say the sunstones ...
Other Sciences / Archaeology & Fossils
Feb 03, 2011 |
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New approach could produce multifunction nanodevices
(PhysOrg.com) -- A team led by University of Wisconsin-Madison researchers has developed a new approach for creating powerful nanodevices, and their discoveries could pave the way for other researchers to begin more widespread ...
Mar 01, 2010 |
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Spin polarization achieved in room temperature silicon
(PhysOrg.com) -- A group in The Netherlands has achieved a first: injection of spin-polarized electrons in silicon at room temperature. This has previously been observed only at extremely low temperatures, ...
Nov 27, 2009 |
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Magnetic fields play larger role in star formation than previously thought
The simple picture of star formation calls for giant clouds of gas and dust to collapse inward due to gravity, growing denser and hotter until igniting nuclear fusion. In reality, forces other than gravity also influence ...
Sep 09, 2009 |
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Researchers set alarm for incoming space storms
(PhysOrg.com) -- A team of researchers at the University of Alberta in Edmonton has broken new ground in outer space by pinpointing the impact epicentre of an Earthbound space storm as it crashes into the ...
Space & Earth / Space Exploration
May 27, 2009 |
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