*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.
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
Scientists channel graphene to understand filtration and ion transport into cells
11.12.2017 | National Institute of Standards and Technology (NIST)
Successful Mechanical Testing of Nanowires
07.12.2017 | Helmholtz-Zentrum Geesthacht - Zentrum für Material- und Küstenforschung
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
13.12.2017 | Health and Medicine
13.12.2017 | Physics and Astronomy
13.12.2017 | Life Sciences