Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Electrical Switching between Paramagnetic and Ferromagnetic States ("Chameleon" Magnets) in Cobalt-Doped Titanium Diox

29.06.2011
Researchers from Japan Science and Technology Agency (JST) and the University of Tokyo and Tohoku University suggested a possibility to control a magnet's behaviour

*Note: This news was first mentioned in the June 2011 issue of Nanotech Japan Update*

Japan Science and Technology Agency (JST), the University of Tokyo and Tohoku University announced on 27th May 2011 that a research team from both Universities led by Associate Professor T. Fukumura of the University of Tokyo has succeeded in observing paramagnetic-ferromagnetic transition induced by electric field-effect ("chameleon" magnets) in transparent oxide semiconductor TiO2 doped with cobalt, (Ti, Co)O2 and that the details of the results are published in the scientific Journal Science on the same day.

Fukumura et al. observed electric field-induced ferromagnetism at room temperature in (Ti0.9Co0.1)O2 with electric double-layer gating FET-structure, which enabled a high-density electron accumulation of „1014/cm2. By applying gate voltages of a few volts, a low-carrier paramagnetic state was transformed into a high-carrier ferromagnetic state, suggesting a possibility to room-temperature spintronics. This research was supported by JST as a PRESTO Project.

On this paper, Professor Igor Zutic of the State University of New York at Buffalo contributed a perspective comment in the same issue of Science.

Journal information

A. Yamada, K. Ueno, T. Fukumura, H. T. Yuan, H. Shimotani, Y. Iwasa, L. Gu, S. Tsukimoto, Y. Iku-hara, and M. Kawasaki, "Electrically Induced Ferromagnetism at Room Temperature in Cobalt-Doped Titanium Dioxide", Science Vol. 332, No. 6033, pp. 1065-1067 (2011)-DOI: 10.1126/science.10120215.

Igor Zutic and John Cerne, "Chameleon Magnets," Science Vol. 332, No. 6033, pp. 1040-1041 (2011) DOI: 10.1126/science.1205775

Mikiko Tanifuji | Research asia research news
Further information:
http://www.researchsea.com

More articles from Materials Sciences:

nachricht Switched-on DNA
20.02.2017 | Arizona State University

nachricht Using a simple, scalable method, a material that can be used as a sensor is developed
15.02.2017 | University of the Basque Country

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Switched-on DNA

20.02.2017 | Materials Sciences

Second cause of hidden hearing loss identified

20.02.2017 | Health and Medicine

Prospect for more effective treatment of nerve pain

20.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>