Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Observation and Electric Current Control of a Local Spin in a Single-Molecule Magnet

29.03.2011
By successfully changing the spin of a molecule, researchers have been able to perform an on/off operation for a molecular magnet. Such reversible switching paves the way for single molecule memory.

Japan Science and Technology Agency and Tohoku University announced on March 2, 2011 that Professor Tadahiro Yoneda of Tohoku University and his colleagues have succeeded in on/off operation of a single molecule magnet. Details are published in Nature Communications*.

A single spin is a basic unit of magnetism and molecular spintronics is attracting attentions in which a spin state of a molecule is switched on and off by changing the molecular structure. Terbium-phthalocyanine complex (TbPc2) forms a single magnet with double-decker structure in which a single Terbium (Tb) atom is sandwiched by two planar phthalocyaninato (Pc) ligands. Electric current is applied to TbPc2 adsorbed on a gold (111) surface via a scanning tunneling microscope. The dI/dV curve of the tunneling current shows a Kondo peak which appears by the presence of unpaired spin of ¦Ð-orbital electron of Pc ligand. The upper Pc ligand in TbPc2 was rotated by applying controlled electric current, leading to the disappearance and reappearance of Kondo peaks.

Theoretical analysis has shown that an angle formed by two ligands changes the strength of the magnet. The rotation shifts the molecular frontier-orbital energies, quenching the ¦Ð-electron spin. Reversible switching between two stable ligand orientations by applying a current pulse should make it possible to code information at a single-molecule level. Further development to a single molecule memory will be expected.

Journal information

*Tadahiro Komeda, Hironari Isshiki, Jie Liu, Yan-Feng Zhang, Nicol¨¢s Lorente, Keiichi Katoh, Brian K. Breedlove and Masahiro Yamashita, "Observation and electric current control of a local spin in a single-molecule magnet", Nature Communications, Volume: 2, Article number: 217,

DOI: doi: 10.1038/ncomms1210. Published 01 March 2011

Mikiko Tanifuji | Research asia research news
Further information:
http://nanonet.nims.go.jp/english/modules/news/article.php?a_id=744
http://www.researchsea.com

Further reports about: Magnet Nature Immunology Single-molecule Spin TbPc2 electric cars single molecule

More articles from Materials Sciences:

nachricht Researchers printed graphene-like materials with inkjet
18.08.2017 | Aalto University

nachricht Superconductivity research reveals potential new state of matter
17.08.2017 | DOE/Los Alamos National Laboratory

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>