This success was achieved under the support of JST and by the collaboration among Tohoku University, JAEA, and Technische Universitaet Kaiserslautern in Germany. Details are published in Nature Materials.
Heat generation associated with electronic charge current will be problematic in future high-density electronics. Spin angular momentum, another entity of electron, is expected to carry information without heat generation. In contrast to existing methods of injecting spin current, such as electromagnetic waves, researchers have shown that acoustic waves, or phonons, can inject spin current by using a Ni81Fe19/Pt bilayer wire on an insulating sapphire plate.
Under a temperature gradient in the sapphire, the voltage generated in the Pt layer was shown to reflect the wire position, although the wire was insulated both electrically and magnetically. This non-local voltage is attributed to the coupling of spins and phonons generated by the temperature gradient, since phonons are the only possible carrier of information.
This is a demonstration of generating spin current by directly injecting acoustic waves to realize spin pumping. Researchers suggest that this finding will open the door to acoustic spintronics, in which acoustic waves are exploited for making spin-based devices.
K. Uchida, H. Adachi, T. An, T. Ota, M. Toda, B. Hillebrands, S. Maekawa, and E. Saitoh, "Long-range spin Seebeck effect and acoustic spin pumping", Nature Materials (2011) doi:10.1038/nmat3099
A new tool for discovering nanoporous materials
23.05.2017 | Ecole Polytechnique Fédérale de Lausanne
Did you know that packaging is becoming intelligent through flash systems?
23.05.2017 | Heraeus Noblelight GmbH
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy