Tag Archives: magnetic field

Atomic Magnetometer Could Have Biomedical, Navigation Applications

Measuring very small changes in the brain’s magnetic fields could lead to a better understanding of maladies such as epilepsy, post-traumatic stress disorder, and traumatic brain injury, but the equipment used for such measurements today is bulky and expensive. Scientists and engineers at the Georgia Tech Research Institute (GTRI) want to address that issue by creating a new generation of atomic magnetometers based on clouds of rubidium atoms. (more…)

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Research resolves a debate over ‘killer electrons’ in space

Findings by UCLA-led team hold promise for new ways to protect telecommunication and navigation satellites

New findings by a UCLA-led international team of researchers answer a fundamental question about our space environment and will help scientists develop methods to protect valuable telecommunication and navigation satellites. The research is published in the journal Nature Communications. (more…)

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Consistency of Earth’s magnetic field history surprises scientists

Washington, D.C.—Earth’s magnetic field is generated by the motion of liquid iron in the planet’s core. This “geodynamo” occasionally reverses its polarity—the magnetic north and south poles swap places. The switch occurs over a few thousand years, and the time between reversals can vary from some tens of thousands to tens of millions of years. (more…)

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A lab with a magnetism all its own

Ariana Fernandez and her magnetometer have a terrific view of Peru.

Admittedly, it’s no postcard image. Fernandez, a senior majoring in archaeological studies, goes in more for soil samples than scenic vistas. Yet with her bits of burnt earth and some world-class technology, she sees South America’s past, present, and geophysical future in stunning detail. (more…)

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Bringing a Spacecraft Back from the Dead

A UA engineering student is part of a team trying to awaken an abandoned NASA space probe and put it back to work in outer space.

More than 25 years ago, an abandoned NASA spacecraft fulfilled its mission, fell silent and has since been hurtling around the sun, somewhere between the orbits of Earth and Mars. Now, a University of Arizona engineering student is trying to wake it up. (more…)

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Hubble Sees Evidence of Water Vapor at Jupiter Moon

NASA’s Hubble Space Telescope has observed water vapor above the frigid south polar region of Jupiter’s moon Europa, providing the first strong evidence of water plumes erupting off the moon’s surface.

Previous scientific findings from other sources already point to the existence of an ocean located under Europa’s icy crust. Researchers are not yet fully certain whether the detected water vapor is generated by erupting water plumes on the surface, but they are confident this is the most likely explanation. (more…)

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Researchers Integrate Single-Crystal BFO onto a Silicon Chip, Open Door to Smart Devices

Researchers from North Carolina State University have for the first time integrated a material called bismuth ferrite (BFO) as a single crystal onto a silicon chip, opening the door to a new generation of multifunctional, smart devices.

BFO has both ferromagnetic and ferroelectric properties, meaning that it can be magnetized by running an electric current through the material. Potential applications for BFO include new magnetic memory devices, smart sensors and spintronics technologies. (more…)

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Diamond Imperfections Pave the Way to Technology Gold

Berkeley Study Provides Unprecedented Details on Ultrafast Processes in Diamond Nitrogen Vacancy Centers

From supersensitive detections of magnetic fields to quantum information processing, the key to a number of highly promising advanced technologies may lie in one of the most common defects in diamonds. Researchers at the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have taken an important step towards unlocking this key with the first ever detailed look at critical ultrafast processes in these diamond defects. (more…)

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