Magnetics Business & Technology - Spring 2018 - 15

RESEARCH & DEVELOPMENT
"is made up of multiple filaments of copper. But applying the idea
to cutting-edge high-temperature superconductors is novel.
"Nobody uses these yet for motors and generators," Pamidi said.
"The technology is not ready for wide use in industrial motors, but
these projects would make it closer to commercialization."
The partnerships behind this team - CAPS and ASC at Florida
State University, SuperPower and ACT in industry - are part of
what make the project so promising, said Florida State's Vice
President for Research Gary K. Ostrander.
"Bringing together industry and academia, engineering and
physics, and CAPS and the MagLab - this grant is an excellent
example of science synergy," Ostrander said.

New Method Enables High-resolution Measurements
of Magnetism

Ján Rusz and Dmitry Tyutyunnikov at Uppsala University, together
with colleagues from Tsinghua University, China, and Forschungszentrum Jülich in Germany have developed and experimentally proven a
new method that allows magnetic measurements of individual atomic
planes. The method uses a unique transmission electron microscope
PICO that can correct both geometrical and chromatic aberrations, allowing a detailed look at individual atomic planes over a wide spectral
range.
"The idea came from Dr. Xiaoyan Zhong, with whom we have a growing fruitful collaboration. We have contributed simulations, which have
confirmed the validity of the experimental design and demonstrated
that the experiment really offers a very detailed look at magnetism of
materials," says Ján Rusz.
Full article: Z. C. Wang, A. Tavabi, L. Jin, J. Rusz, D. Tyutyunnikov, H. B. Jiang, Y.
Moritomo, J. Mayer, R. E. Dunin-Borkowski, R. Yu, J. Zhu, and X.Y. Zhong, (2018)

Authors Xiaoyan Zhong (left) and Ján Rusz (right)
In a new article, published in Nature Materials, researchers from
Beijing, Uppsala and Jülich have made significant progress allowing very high resolution magnetic measurements. With
their method it is possible to measure magnetism of individual
atomic planes.
Magnetic nanostructures are used in a wide range of applications. Most notably, to store bits of data in hard drives. These
structures are becoming so small that the usual magnetic measurement methods fail to provide data with sufficient resolution.
Due to the ever-growing demand for more powerful electronic
devices, the next generation spintronic components must have
functional units that are only a few nanometers large. It is easier
to build a new spintronic device, if we can see it in sufficient
detail. This is becoming increasingly difficult with the rapid advance of nano-technologies. One instrument capable of such
detailed imaging is the transmission electron microscope.
An electron microscope is a unique experimental tool offering scientists and engineers a wealth of information about all
kinds of materials. As opposed to optical microscopes, it uses
electrons to study the materials. This enables enormous magnifications. For example, in crystals one can routinely observe
individual columns of atoms. Electron microscopes provide information about structure, composition and chemistry of materials. Recently, researchers also found ways to use electron
microscopes to measure magnetic properties. However, atomic
resolution has not yet been reached in this application.

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