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:3/23/2017)... , March 23, 2017 The report "Gesture Recognition and ... Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the market ... CAGR of 29.63% between 2017 and 2022. Continue ... ... ...
(Date:3/22/2017)... , March 21, 2017   Neurotechnology , ... recognition technologies, today announced the release of the ... which provides improved facial recognition using up to ... a single computer. The new version uses deep ... accuracy, and it utilizes a Graphing Processing Unit ...
(Date:3/22/2017)... LIVERMORE, Calif. , March 21, 2017 ... recognition analytics company serving law enforcement agencies, announced today ... Sheridan as director of public safety business development. ... of diversified law enforcement experience, including a focus on ... Vigilant. In his most recent position, Mr. Sheridan served ...
Breaking Biology News(10 mins):
(Date:8/23/2017)... ... August 23, 2017 , ... ... ability to manipulate 3D models of pediatric patients’ neuroanatomy and accurately tailor radiation ... of the Journal of Medical Imaging. The advance is reported in an article ...
(Date:8/23/2017)... ... 22, 2017 , ... Patients suffering from gum disease and failing implants now ... Malik. Dr. Malik, of Broward Center for Laser Periodontics and Implants , ... future of dentistry with regenerative periodontal procedures. , "I initially became ...
(Date:8/23/2017)... Virginia (PRWEB) , ... August 23, 2017 , ... NDA ... PhD, former Director of the Office of Device Evaluation at the FDA’s Center for ... industries, has joined the firm as an Expert Consultant. , Prior to his FDA ...
(Date:8/22/2017)... ... August 22, 2017 , ... One ... is the practice of opioid-dose sparing. Opioid-dose sparing refers to the reduction of ... including with non-steroidal anti-inflammatory drugs (NSAIDs). , The potential for new therapies to ...
Breaking Biology Technology: