Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

High-Pressure Generator Using a Superconducting Diamond Developed

05.07.2016

Integration of a Hime Diamond into the Device Simplifies Measurement of Electrical Resistance under Ultra-High Pressure.

Researchers of National Institute of Materials Science and Ehime University, Japan, developed a new diamond anvil cell by micro-fabricating a superconducting diamond, which conducts electricity like metal and serves as electrodes, on the world’s hardest and chip-proof nano-polycrystalline diamond.


Figure: Structures of diamond anvils. In the new DAC, a Hime diamond was used as a lower anvil and a superconducting diamond, which serves as electrodes, was fabricated on top of the anvil. In the conventional DAC, pressure is generated by two pointed curettes of the lower and upper diamonds pressing on each other. In this system, electrodes need to be inserted between the curette and the gasket.

Copyright : NIMS

A research group led by Yoshihiko Takano, a leader of the Nano Frontier Superconducting Materials Group, Environment and Energy Materials Division, NIMS, and another research group led by Tetsuo Irifune, a director of the Geodynamics Research Center (GRC), Ehime University, jointly developed a new diamond anvil cell (DAC) by micro-fabricating a superconducting diamond, which conducts electricity like metal and serves as electrodes, on the world’s hardest and chip-proof nano-polycrystalline diamond (Hime diamond). As a result, the conventional practice of skillfully attaching four electrodes to a small sample (of several dozen microns) was eliminated, and thus electrical resistance measurements under ultra-high pressure have become much easier. Furthermore, because diamond electrodes can be used repeatedly, physical property measurements have dramatically improved in terms of work and economic efficiencies.

As shown in the right diagram in Figure 1, a typical DAC is a device to generate high pressure by pressing curettes of paired diamond anvils on each other. To increase the pressure generated by the device, it is necessary to make the areas of the curettes smaller. Specifically, to generate ultra-high pressure (several hundreds of thousands of atmospheric pressure), curettes need to be about 400 microns in diameter.

Operation of such a device would be very difficult due to the requirement that the sizes of the samples to be studied need to be as small as about 100 microns. To generate a million atmospheric pressure or higher, the sizes of the samples need to be even smaller, making it extremely challenging to manually attach electrodes to the samples.

Accordingly, research group micro-fabricated superconducting diamond electrodes on the top of the anvil using the electron-beam lithography method. As it is convenient to use a plate-shaped diamond for the fabrication of electrodes using lithography, they combined a plate-shaped diamond and another diamond with a curette to form a diamond anvil cell with its shape as shown in the left diagram in Figure 1.

As a result, research group succeeded in developing a new diamond anvil cell by combining the world’s hardest diamond electrodes and the world’s hardest diamond anvil. Because advanced experimental technologies are required, materials R&D under ultra-high pressure is still largely unexplored. As such, this field has great potential to offer opportunities for exploring novel materials and superconductors with extraordinary functions. We believe that this new technology will contribute to Japan’s advancement in materials development.

A part of this research was supported by the Premier Research Institute for Ultrahigh-pressure Sciences (PRIUS), which has been recognized by the Ministry of Education, Culture, Sports, Science and Technology as a shared-use research facility.

This study was presented on February 23 at a PRIUS Symposium to be held at the Geodynamics Research Center (GRC), Ehime University.

Associated links

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

More articles from Materials Sciences:

nachricht Physics, photosynthesis and solar cells
01.12.2016 | University of California - Riverside

nachricht New process produces hydrogen at much lower temperature
01.12.2016 | Waseda 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: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>