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:5/16/2017)... DALLAS , May 16, 2017   ... for health organizations, and MD EMR Systems ... certified development partner for GE, have established a ... Patient Portal product and the GE Centricity™ products, ... Centricity EMR. These new integrations ...
(Date:4/17/2017)... Florida , April 17, 2017 NXT-ID, ... technology company, announces the filing of its 2016 Annual Report on ... and Exchange Commission. ... on Form 10-K is available in the Investor Relations section of ... as on the SEC,s website at http://www.sec.gov . ...
(Date:4/11/2017)... No two people are believed to ... York University Tandon School of Engineering and Michigan ... partial similarities between prints are common enough that ... and other electronic devices can be more vulnerable ... in the fact that fingerprint-based authentication systems feature ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... -- VMS BioMarketing, a leading provider of patient support solutions, has ... (CNE) network, which will launch this week. The VMS CNEs ... professionals to enhance the patient care experience by delivering peer-to-peer ... care professionals to help women who have been diagnosed and ... ...
(Date:10/11/2017)... ... October 11, 2017 , ... Disappearing forests and increased ... of over 5.5 million people each year. Especially those living in larger cities are ... - based in one of the most pollution-affected countries globally - decided to take ...
(Date:10/11/2017)... Florida (PRWEB) , ... October 11, 2017 , ... ... Drug Administration (FDA) has granted orphan drug designation to SBT-100, its novel anti-STAT3 ... for the treatment of osteosarcoma. SBT-100 is able to cross the cell membrane ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... conjugate (ADC) therapeutics, today confirmed licensing rights that give it exclusive global ... technology developed in collaboration with Children’s Hospital Los Angeles (CHLA). Additionally, ...
Breaking Biology Technology: