Spintronics-Info: the spintronics experts

Spintronics-Info is a news hub and knowledge center born out of keen interest in spintronic technologies.

Spintronics is the new science of computers and memory chips that are based on electron spin rather than (or in addition to) the charge (used in electronics). Spintronics is an exciting field that holds promise to build faster and more efficient computers and other devices.

Recent spintronics News

Researcher develop a spin-resolved oscilloscope

Mar 14, 2017

Researchers from the Tokyo Institute of Technology and Nippon Telegraph and Telephone Corporation developed a measurement instrument for plasmonics and spintronics. The so-called "spin-resolved oscilloscope" is seen as a step towards future "spin-plasmonics" devices that can achieve ultra-high-speed and low-energy-consumption.

Spin resolved oscilloscope scheme (TIT 2017)

The spin-resolved oscilloscope is composed of a spin filter and nanometer-scale time-resolved charge detectors. The spin filter separates the spin-up and -down electrons, while the time-resolved charge detector measures the waveforms of the charge-density waves. By combining these spintronic and plasmonic devices, the spin-resolved oscilloscope is established. The new device enables the measurement of the waveforms of both charge and spin signals in electronic devices. The charge signal is the total charge of the spin-up and -down electron densities, while the spin signal is the difference between the spin-up and -down electron densities.

Researchers develop world's fastest magnetic tunnel junction that is switched by light pulses

Mar 12, 2017

Researchers from the University of Minnesota developed a magnetic tunnel junction that is switched by using a short pulse of light. The switch operation takes only one trillionth of a second - which makes this the world's fastest magnetic tunnel junction.

Magnetic tunnel junction light-switch photo

To create this device, the researchers used ITO to create a transparent electrode on top of an ally made from called gadolinium, iron and cobalt. This material is already known to be switchable using light pulses.

Spin-LED enable almost purely circularly polarized emission

Feb 10, 2017

Researchers from the Tokyo Institute of Technology managed to achieve an almost purely circularly polarized (CP) electroluminescence (EL) in spin-polarized LEDs at room temperature without an external magnetic field.

Spin-LED design and images (Tokyo Institute of Technology)

The researchers used LEDs and a polycrystalline Fe in-plane spin injector. During the experiment the researchers injected spins of a given type, which were dispersed due to spin relaxation. Radiative recombination subsequently occurred, which was observed in the form of a linearly polarized emission. Almost pure circularly polarized emission was achieved when the current density was high enough.

MIT and JGU researchers advance towards skyrmion-based spintronics

Dec 30, 2016

Researchers from MIT and the Johannes Gutenberg University Mainz (JGU) achieved the billion-fold reproducible motion of skyrmions (special spin structures) between different positions. The researchers say that this kind of process is needed to produce magnetic shift registers - and so this is a critical step towards skyrmions applications in spintronics devices.

The magnetic structure of the skyrmion (image)

Using specially design thin film structures (asymmetric multilayer devices) that exhibit broken inversion symmetry that stabilize the skyrmions. In such structures, skyrmions have a unique stability - which makes them compelling for such spintronic devices. The researchers say that those skyrmions, that can be shifted by electrical currents and move relatively undisturbed through the track, are very promising to make racetrack devices.