The Study May Contribute to the Development of High-Performance Functional Materials in Information & Communication and Electronics.
A research team led by Kazunari Yamaura, chief researcher, Superconducting Properties Unit, National Institute for Materials Science (NIMS), Japan, and Dr. Stuart Calder and others at the Oak Ridge National Laboratory in the United States, jointly demonstrated that the strongest ever spin-phonon coupling was observed in osmium oxide synthesized for the first time in the world by NIMS in 2009. A general belief is that the stronger the coupling between various properties in a material is, the more advantageous it is in the development of a new functional material. As such, the osmium oxide may serve as a candidate for a next-generation functional material useful in the areas of information & technology and electronics.
While platinum group elements and their compounds are widely used as catalysts, their other functions have not been explored very much, partly because they are expensive. Amid the situation, the NIMS research team discovered that the osmium oxide it synthesized in 2009 exhibits an unusual magnetic transition at about 140°C, which is higher than room temperature, and had been taking on the challenge of pioneering non-catalytic, industrial functions of the material.
Based on the recent observation of spin-phonon coupling in the osmium oxide, the team found that the coupling was the strongest ever observed. The strong spin-phonon coupling may be caused by the outermost orbitals of osmium atoms as they are greatly extended outward in space, in the solid oxide. The fact that this structural characteristic is common to all platinum group elements suggests that compounds based on these elements other than osmium are also likely to be associated with strong spin-phonon coupling.
Spin-phonon coupling directly represents the strength of interaction between magnetism (spin) and the crystal lattice system (phonon). Recent studies indicate that the stronger the spin-phonon interaction is, the more favorable it is in the development of new materials—such as a multiferroic material, for example—in which the coupling of magnetism and the lattice system has great importance. Expectations are rising for the multiferroic material as a candidate for an innovative functional material, as it may contribute to the realization of power-saving high-density information-recording elements and power-saving ultra-high-speed logic elements. This study is considered to be a major step toward this endeavor.
This research was carried out in the framework of the NIMS 3rd Mid-Term Program project on advanced superconducting materials.
(This study was published in Nature Communications on Nov. 26, 2015: S. Calder, J.H. Lee, M.B. Stone, M.D. Lumsden, J.C. Lang, M. Feygenson, Z. Zhao, J.-Q. Yan, Y.G. Shi, Y.S. Sun, Y. Tsujimoto, K. Yamaura, and A.D. Christianson: “Enhanced spin-phonon-electronic coupling in a 5d oxide”: doi:10.1038/ncomms9916)
Original article from National Institute for Materials Science
Mikiko Tanifuji | Research SEA
How nanoscience will improve our health and lives in the coming years
27.10.2016 | University of California - Los Angeles
3-D-printed structures shrink when heated
26.10.2016 | Massachusetts Institute of Technology
Physicists from the University of Würzburg have designed a light source that emits photon pairs. Two-photon sources are particularly well suited for tap-proof data encryption. The experiment's key ingredients: a semiconductor crystal and some sticky tape.
So-called monolayers are at the heart of the research activities. These "super materials" (as the prestigious science magazine "Nature" puts it) have been...
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
28.10.2016 | Power and Electrical Engineering
28.10.2016 | Physics and Astronomy
28.10.2016 | Life Sciences