Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Strongest Ever Spin-Phonon Coupling Observed

18.01.2016

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.


Figure: (a) Schematic of an osmium oxide (NaOsO3) crystal structure and (b) an optical microscope image of the single crystal.

Copyright : National Institute for Materials Science

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)


Associated links
Original article from National Institute for Materials Science

Mikiko Tanifuji | Research SEA
Further information:
http://www.researchsea.com

More articles from Materials Sciences:

nachricht Mat4Rail: EU Research Project on the Railway of the Future
23.02.2018 | Universität Bremen

nachricht Atomic structure of ultrasound material not what anyone expected
21.02.2018 | North Carolina State University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

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...

Im Focus: Demonstration of a single molecule piezoelectric effect

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...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>