Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Underlying connection found between diverse materials with extreme magnetoresistance

15.06.2016

Unifying phase diagrams could be used to find materials with useful applications in magnetic memory

A new study from the Cava lab has revealed a unifying connection between seemingly unrelated materials that exhibit extreme magnetoresistance, the ability of some materials to drastically change their electrical resistance in response to a magnetic field, a property that could be useful in magnetic memory applications.


Resistance-temperature-applied-magnetic-field diagrams of materials exhibiting extreme magnetoresistance are shown.

Credit: Cava lab

"The chemistry of these materials looks completely different but they're connected on a profound level by their physics," said Robert Cava, the Russell Wellman Moore professor of chemistry and corresponding author on the work published in the Proceedings of the National Academy of Sciences.

Numerous materials with extreme magnetoresistance have been reported since the Cava lab first discovered extreme magnetoresistance (originally named 'large magnetoresistance' by Nature editors before the research field supplanted it with the current term) in WTe2 two years ago.

But in particular, researchers in the Cava lab noticed that five materials with extreme magnetoresistance yet very different structures and chemical make-up all share the same characteristics when their resistance-temperature-applied-magnetic-field diagrams are measured. This diagram maps the temperature and magnetic field strength at which the material's magnetoresistance turns on and then saturates. Using the phase diagrams as a clue, scientists may be able to identify other materials with extreme magnetoresistance.

Detailed investigations by Fazel Tafti, a former Cava lab postdoc and physics PhD, revealed a common feature related to the materials' electronic structures, leading the researchers to propose a picture of the underlying physics that unifies these chemically disparate materials. This kind of research, where materials chemistry and materials physics meet, is what the Cava lab and its collaborators enjoy the most, Cava said.

"Now we hope that other people will think about this, and make more measurements to see whether our proposal for the unifying physics holds up to more intense scrutiny," Cava said. He was confident that first author Fazel Tafti, now an assistant professor of physics at Boston College, would get to the bottom of this phenomenon. "Physicists quest for truth," he said.

###

Read the full article here:

Tafti, F. F.; Gibson, Q.; Kushwaha, S.; Krizan, J. W.; Haldolaarachchige, N.; Cava, R. J. "Temperature-field phase diagram of extreme magnetoresistance." Published online before print June 7, 2016.

This research was supported by the Gordon and Betty Moore Foundation under the EPiQS program, Grant GBMF 4412 and the ARO MURI on topological insulators, Grant W911NF-12-1-0461.

Media Contact

Tien Nguyen
tienn@princeton.edu
609-258-6523

 @Princeton

http://www.princeton.edu 

Tien Nguyen | EurekAlert!

More articles from Materials Sciences:

nachricht Barely scratching the surface: A new way to make robust membranes
13.12.2018 | DOE/Argonne National Laboratory

nachricht Topological material switched off and on for the first time
11.12.2018 | ARC Centre of Excellence in Future Low-Energy Electronics Technologies

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: An energy-efficient way to stay warm: Sew high-tech heating patches to your clothes

Personal patches could reduce energy waste in buildings, Rutgers-led study says

What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...

Im Focus: Lethal combination: Drug cocktail turns off the juice to cancer cells

A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.

The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...

Im Focus: New Foldable Drone Flies through Narrow Holes in Rescue Missions

A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.

Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...

Im Focus: Topological material switched off and on for the first time

Key advance for future topological transistors

Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...

Im Focus: Researchers develop method to transfer entire 2D circuits to any smooth surface

What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.

Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

New Plastics Economy Investor Forum - Meeting Point for Innovations

10.12.2018 | Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

 
Latest News

Magic number colloidal clusters

13.12.2018 | Life Sciences

UNLV study unlocks clues to how planets form

13.12.2018 | Physics and Astronomy

Live from the ocean research vessel Atlantis

13.12.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>