Navigation Links
Nature: Molecule changes magnetism and conductance
Date:7/5/2012

This release is available in German.

One bit of digital information stored on a hard disk currently consists of about 3 million magnetic atoms. Researchers from Karlsruhe, Strasbourg, and Japan have now developed a mag-netic memory with one bit per molecule. By an electric pulse, the metal-organic molecule can be switched reliably between a conductive, magnetic state and a low-conductive, non-magnetic state. This novel correlation for molecules is now reported in the Nature Communications journal. (doi: 10.1038/ncomms1940)

"The superparamagnetic effect prevents smaller bit sizes from being reached in a hard disk," explains Toshio Miyamachi, first author of the study and researcher at the Center for Functional Nanostructures (CFN) of Karlsruhe Institute of Technology (KIT). This super-paramagnetic effect implies that magnetic memory crystals are in-creasingly susceptible to thermal switching with decreasing size. Consequently, information may soon be lost. "We chose another approach and placed a single magnetic iron atom in the center of an organic molecule consisting of 51 atoms. The organic shell protects the information stored in the central atom." Apart from the ultimate density of one bit per molecule, this type of memory based on so-called spin crossover molecules also has the advantage of the writ-ing process being reliable and purely electric.

"Using a scanning tunneling microscope, we applied defined elec-tricity pulses to the nanometer-sized molecule," adds Wulf Wulfhe-kel, head of the research group at KIT's Physikalisches Institut. "This reproducibly changes not only the magnetic state of the iron, but also the electric properties of the molecule." Hence, the two magnet-ic configurations lead to varying conductances, such that the mag-netic state of the molecule can be determined easily by a simple resistance measurement.

The present study reports the fundamentals and shows the principle feasibility and advantages of memories consisting of spin crossover molecules. "These memristive and spintronic properties combined in a molecule will open up a new field of research," the researchers are convinced. Memristors are memories that store information in the form of resistance variations. Spintronics uses the magnetic spin of individual particles for information processing.


'/>"/>

Contact: Monika Landgraf
presse@kit.edu
49-721-608-48126
Helmholtz Association of German Research Centres
Source:Eurekalert  

Related biology news :

1. Nature: Microscope looks into cells of living fish
2. Nature: Video reveals wave character of particles
3. Master molecule may improve stem cell treatment of heart attacks
4. Molecule found that inhibits estrogen, key risk factor for endometrial and breast cancers
5. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
6. Discovery of a molecule that initiates maturation of mammalian eggs can lead to more IVF pregnancies
7. Air pollution level changes in Beijing linked with biomarkers of cardiovascular disease
8. Changes in brains blood flow could cause brain freeze
9. Scientists find that neurological changes can happen due to social status
10. How old are these rocks, how were they made, and how long ago did these geologic changes happen?
11. Holding a mirror to brain changes in autism
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nature: Molecule changes magnetism and conductance
(Date:6/22/2016)... June 22, 2016   Acuant , ... verification solutions, has partnered with RightCrowd ® ... for Visitor Management, Self-Service Kiosks and Continuous ... that add functional enhancements to existing physical ... and venues with an automated ID verification ...
(Date:6/15/2016)... ALBANY, New York , June 15, 2016 ... published a new market report titled "Gesture Recognition Market ... Trends and Forecast, 2016 - 2024". According to the ... at USD 11.60 billion in 2015 and is ... and reach USD 48.56 billion by 2024.  ...
(Date:6/2/2016)... -- The Department of Transport Management (DOTM) of ... US Dollar project, for the , Supply and ... and IT Infrastructure , to Decatur ... of Identity Management Solutions. Numerous renowned international vendors participated in ... was selected for the most compliant and innovative solution. ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Houston ... with the Cy-Fair Sports Association to serve as ... the agreement, Houston Methodist Willowbrook will provide sponsorship ... and connectivity with association coaches, volunteers, athletes and ... with the Cy-Fair Sports Association and to bring ...
(Date:6/23/2016)... June 23, 2016   EpiBiome , a precision ... million in debt financing from Silicon Valley Bank (SVB). ... and to advance its drug development efforts, as well ... "SVB has been an incredible strategic partner ... a traditional bank would provide," said Dr. Aeron ...
(Date:6/23/2016)... June 23, 2016 Apellis Pharmaceuticals, Inc. ... clinical trials of its complement C3 inhibitor, APL-2. ... multiple ascending dose studies designed to assess the ... subcutaneous injection in healthy adult volunteers. ... as a single dose (ranging from 45 to ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only free validated ... will showcase its product’s latest features from June 26 to June 30, 2016 ... on Disrupting Clinical Trials in The Cloud during the conference. DIA (Drug ...
Breaking Biology Technology: