Together with their colleagues from Germany and the Netherlands, scientists at the Moscow Institute of Physics and Technology (MIPT) have found a way to significantly improve computer performance. In their paper published in Nature Photonics, they propose the use of the so-called T-waves, or terahertz radiation as a means of resetting computer memory cells. This process is several thousand times faster than magnetic-field-induced switching.
“We have demonstrated an entirely new way of controlling magnetization, which relies on short electromagnetic pulses at terahertz frequencies. This is an important step towards terahertz electronics. As far as we know, our study is the first to make use of this mechanism to trigger the oscillations of magnetic subsystems,” says Anatoly Zvezdin of Prokhorov General Physics Institute and MIPT, a coauthor of the paper and a USSR State Prize-winning scientist heading MIPT’s Laboratory of Physics of Magnetic Heterostructures and Spintronics for Energy-Saving Information Technologies.
The rapidly increasing amounts of digital data that have to be manipulated, along with the growing complexity of the computation tasks at hand, compel hardware designers to achieve ever higher computational speeds. Many experts believe that classical computation is currently approaching a limit, beyond which no further increase in data processing speed will be practicable. This is motivating scientists all over the world to investigate possibilities of entirely different computer technologies. One of the weak spots in modern computers holding back their evolution is memory: it takes time to complete every set/reset operation for a magnetic memory cell, and reducing the duration of this cycle is a very challenging task.
A group of scientists including Sebastian Baierl of the University of Regensburg, Anatoly Zvezdin, and Alexey Kimel of Radboud University Nijmegen (the Netherlands) and Moscow Technological University (MIREA) proposed that electromagnetic pulses at terahertz frequencies (with wavelengths of about 0.1 millimeters, i.e., between those of microwaves and infrared light) could be used in memory switching instead of external magnetic fields. A more familiar device that makes use of terahertz radiation is the airport body scanner. T-rays can expose weapons or explosives concealed under a person’s clothing, without causing any harm to live tissues.
To find out whether T-rays could be used for convenient memory states switching (storing “magnetic bits” of information), the researchers performed an experiment with thulium orthoferrite (TmFeO?). As a weak ferromagnet, it generates a magnetic field by virtue of the ordered alignment of the magnetic moments, or spins of atoms in the microcrystals (magnetic domains). In order to induce a reorientation of spins, an external magnetic field is necessary.
However, the experiment has shown that it is also possible to control magnetization directly by using terahertz radiation, which excites electronic transitions in thulium ions and alters the magnetic properties of both iron and thulium ions. Furthermore, the effect of T-rays proved to be almost ten times greater than that of the external magnetic field. In other words, the researchers have devised a fast and highly efficient remagnetization technique—a solid foundation for developing ultrafast memory.
The scientists expect their “T-ray switching” to work with other materials as well. Thulium orthoferrite, which was used in the experiment, happens to be convenient for the purposes of demonstration, but the proposed magnetization control scheme itself is applicable to many other magnetic materials.
“There was a Soviet research group that used orthoferrites in their studies, so this was always kind of a priority field for us. This research can be seen as a follow-up on their studies,” says Anatoly Zvezdin.
The Latest on: Computer memory
via Google News
The Latest on: Computer memory
- One of NASA's new 'Turtle' astronauts may walk on the moon ... or even Marson January 11, 2020 at 3:00 am
One of the members of NASA's newest astronaut class graduating today (Jan. 10) might be the next to walk on the moon and perhaps might even be the first to set foot on Mars. The graduates, nicknamed ...
- Rare salt formations in Utah could offer clues about life on Marson January 10, 2020 at 5:15 pm
Tiny crystals found on edge of Great Salt Lake may offer insight about similar structures on the red planet, scientists say ...
- Water Is Disappearing from the Surface of Mars Like Crazyon January 10, 2020 at 12:44 pm
Water may be evaporating off Mars’ surface much more quickly than scientists previously thought. This could shape our understanding of when conditions of the red planet became so dry. Better ...
- Mars loses water to space during warm, stormy seasonson January 10, 2020 at 10:06 am
Jan. 10 (UPI) --All kinds of geological formations on Mars, alluvial fans, dry lake beds and eroded river valleys, suggest the Red Planet once hosted an abundance of water. Today, the water is mostly ...
- NASA graduates new class of astronauts for missions to the moon, Marson January 10, 2020 at 10:02 am
HOUSTON — NASA's newest astronauts are ready to come out of their shells and walk on the moon. Nicknamed the "Turtles," the space agency's 22nd class of astronauts graduated from basic training and ...
- Women Lie About Bruno Mars, Defraud Sandy Hook Concert Investors: Fedson January 10, 2020 at 9:49 am
Two women are accused of posing as booking agents for Justin Timberlake and Bruno Mars and defrauding investors for a concert to benefit the Sandy Hook Promise Foundation. Nancy Jean, 51, of Riverdale ...
- Mars, already largely desert, is losing water quicker than expected, study sayson January 10, 2020 at 9:41 am
A new study reveals that more water vapor is accumulating in the upper atmosphere of Mars, allowing more of it to escape into space. This means that Mars is losing water more quickly than anticipated.
- Meet NASA's first astronaut graduates of the Artemis program, eligible for missions to the moon and Marson January 10, 2020 at 7:32 am
After more than two years of training, the first class of NASA astronaut candidates under the agency's program to land the first woman and next man on the moon have graduated.
- Inside NASA’s $2.5 billion mission to find evidence of life on Marson January 10, 2020 at 4:00 am
But instead of a camera that turns bratty kids into miniatures, the centerpiece is NASA’s new Mars 2020 rover, which the agency aims to deploy to the Red Planet this summer. Although less ...
via Bing News