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Search results for magnetic currents
How space eruptions happen
Apr 07, 2009 |
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(PhysOrg.com) -- Mathematicians at the University of St Andrews have made a discovery which could lead to a better understanding of why huge eruptions occur in space.
New spintronics effect could lead to magnetic batteries
Oct 10, 2008 |
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(PhysOrg.com) -- Physicists have recently discovered that heating one side of a magnetized nickel-iron rod causes electrons to rearrange themselves according to their spins. This so-called "spin Seebeck effect" ...
Study of 'Persistent Currents' Finally Verifies Theory
Apr 28, 2009 |
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(PhysOrg.com) -- Approximately 20 years ago, scientists discovered that is is possible for an electric current to flow endlessly in a ring made of a normal metal. One might think that such an 'old' finding ...
Scientists pinpoint mechanism to increase magnetic response of ferromagnetic semiconductor
Feb 25, 2009 |
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(PhysOrg.com) -- When squeezed, electrons increase their ability to move around. In compounds such as semiconductors and electrical insulators, such squeezing can dramatically change the electrical- and magnetic- ...
Magnetic Sensor That Brooks No Interference
Jun 03, 2008 |
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Sensors accurately register the slightest temperature fluctuations, the tiniest changes to a magnetic field, or barely perceptible air currents. In some cases, however, there are limits to their accuracy – ...
THEMIS satellite tracks electrical tornadoes in space
Space & Earth / Space Exploration
Apr 23, 2009 |
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(PhysOrg.com) -- Earth-bound tornadoes are puny compared to "space tornadoes," which span a volume as large as Earth and produce electrical currents exceeding 100,000 amperes, according to new observations ...
'Magnetricity' observed and measured for the first time
Oct 15, 2009 |
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(PhysOrg.com) -- A magnetic charge can behave and interact just like an electric charge in some materials, according to new research led by the London Centre for Nanotechnology.
Putting a new spin on current research
Nov 15, 2008 |
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Physicists in the USA and at the London Centre for Nanotechnology have found a way to extend the quantum lifetime of electrons by more than 5,000 per cent, as reported in this week's Physical Review Letters. Electr ...
NASA Satellites Discover What Powers Northern Lights
Space & Earth / Space Exploration
Jul 24, 2008 |
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(PhysOrg.com) -- Researchers using a fleet of five NASA satellites have discovered that explosions of magnetic energy a third of the way to the moon power substorms that cause sudden brightenings and rapid movements of the ...
Tiny nano-electromagnets turn a cloak of invisibility into a possibility
Dec 22, 2009 |
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A team of researchers at the FOM institute AMOLF (The Netherlands) has succeeded for the first time in powering an energy transfer between nano-electromagnets with the magnetic field of light.
Energy simulation may explain turbulence mystery
Feb 26, 2009 |
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(PhysOrg.com) -- A new 3D model linking magnetic fields to the transfer of energy in space might help solve a physics mystery first observed in the solar wind 15 years ago.
Scientists discover magnetic superatoms
Jun 15, 2009 |
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A team of Virginia Commonwealth University scientists has discovered a 'magnetic superatom' - a stable cluster of atoms that can mimic different elements of the periodic table - that one day may be used to ...
How do marine turtles return to the same beach to lay their eggs?
Biology /
Feb 26, 2007 |
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Marine turtles almost always return to the same beach to lay their eggs. The egg-laying sites are often far from the feeding areas and the females cross several hundred kilometers of ocean with no visual landmarks. How do ...
Physicists Measure Elusive 'Persistent Current' That Flows Forever
Oct 08, 2009 |
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(PhysOrg.com) -- Physicists at Yale University have made the first definitive measurements of "persistent current," a small but perpetual electric current that flows naturally through tiny rings of metal wire ...
Mice Levitated for Space Research
Sep 11, 2009 |
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(PhysOrg.com) -- Scientists have managed to levitate young mice in research carried out for NASA. Levitated mice may help research on bone density loss during long exposures to low gravity, such as in space ...
