*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
Atomic structure of ultrasound material not what anyone expected
21.02.2018 | North Carolina State University
Hidden talents: Converting heat into electricity with pencil and paper
20.02.2018 | Helmholtz-Zentrum Berlin für Materialien und Energie
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
21.02.2018 | Life Sciences
21.02.2018 | Life Sciences
21.02.2018 | Materials Sciences