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 Less is more to produce top-notch 2D materials
20.11.2017 | The Agency for Science, Technology and Research (A*STAR)

nachricht The stacked colour sensor
16.11.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Antarctic landscape insights keep ice loss forecasts on the radar

20.11.2017 | Earth Sciences

Filling the gap: High-latitude volcanic eruptions also have global impact

20.11.2017 | Earth Sciences

Water world

20.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>