Magnetics Business & Technology - Summer 2015 - (Page 4)
New Magnetic Ce Alloy Could Replace
Scientists at DOE's Ames Laboratory have created a new magnetic alloy that may be a lower-cost
potential replacement for high-performance permanent magnets found in wind turbines and car
engines. The alloy eliminates the use of one of the
scarcest and costliest rare earth elements, dysprosium, and instead uses cerium, the most abundant
The result, an alloy of neodymium, iron and boron
co-doped with cerium and cobalt, is a less expensive
material with properties that are competitive with
traditional sintered magnets containing dysprosium.
"This is quite exciting result; we found that this material works better than anything out there at temperatures above 150°C," said Ames Laboratory scientist
Karl A. Gschneidner. "It's an important consideration
for high-temperature applications."
Volume 14, Issue 2
Editor & Publisher
Director of Content
Ames Laboratory scientists have used
cerium to create a high-performance
magnet that's similar in performance to
traditional dysprosium-containing magnets and could make wind turbines less
expensive to manufacture.
NASA Spacecraft in Earth's Orbit, Preparing to Study
Following a successful launch, NASA's four Magnetospheric Multiscale (MMS) spacecraft are
positioned in Earth's orbit to begin the first space mission dedicated to the study of a phenomenon called magnetic reconnection. This process is thought to be the catalyst for some of the
most powerful explosions in our solar system.
The spacecraft, positioned one on
top of the other on a United Launch
Alliance Atlas V 421 rocket, launched
from Cape Canaveral Air Force Station, Florida. After reaching orbit, each
spacecraft deployed from the rocket's
upper stage sequentially, in five-minute
increments, beginning at 12:16 a.m. Friday, with the last separation occurring
at 12:31 a.m. NASA scientists and engineers were able to confirm the health
of all separated spacecraft at 12:40 a.m.
The mission will provide the first
three-dimensional views of reconnection occurring in Earth's protective
magnetic space environment, the magnetosphere. Magnetic reconnection occurs when magnetic fields connect, disconnect, and reconfigure explosively, releasing bursts of energy that can
reach the order of billions of megatons of trinitrotoluene (commonly known as TNT). These
explosions can send particles surging through space near the speed of light.
Scientists expect the mission will not only help them better understand magnetic reconnection, but also will provide insight into these powerful events, which can disrupt modern technological systems such as communications networks, GPS navigation and electrical power grids.
By studying reconnection in this local, natural laboratory, scientists can understand the process elsewhere, such as in the atmosphere of the sun and other stars, in the vicinity of black
holes and neutron stars, and at the boundary between our solar system's heliosphere and interstellar space.
The spacecraft will fly in a tight formation through regions of reconnection activity. Using sensors
designed to measure the space environment at rates 100 times faster than any previous mission.
"MMS is a crucial next step in advancing the science of magnetic reconnection - and no mission has ever observed this fundamental process with such detail," said Jeff Newmark, interim
director for NASA's Heliophysics Division at the agency's Headquarters in Washington. "The
depth and detail of our knowledge is going to grow by leaps and bounds, in ways that no one
can yet predict."
MMS is the fourth mission in the NASA Solar Terrestrial Probes Program. Goddard built, integrated and tested the four MMS spacecraft and is responsible for overall mission management
Magnetics Business & Technology * Summer 2015
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Table of Contents for the Digital Edition of Magnetics Business & Technology - Summer 2015
Bonded Magnets: A Versitile Class of Permanent Magnets
Spintronics on Paper: The Whys and Wherefores
Magnets, Materials & Assemblies
Software & Design
Research & Development
Marketplace / Advertising Index
Spontaneous Thoughts: The Rate Determining Step
Magnetics Business & Technology - Summer 2015