Abstract
The two-stage 6-8 multi-anvil (MA8) apparatus is an important large-volume, high-pressure technique that has been widely used in the high pressure mineralogy and material synthesis, mainly at room temperature or above. Recently, we have successfully developed a two-stage MA8 apparatus for low-temperature physical property measurements. The first-stage anvils at top and bottom sides are fabricated as a single piece in order to reduce the total size of the cylindrical module, which is put in a top-loading high pressure cryostat and compressed by a 1000 ton hydraulic press. A castable, split octahedral gasket with integrated fin was specifically designed in order to introduce the electrical leads from the inside sample container filled with a liquid pressure transmitting medium. By using tungsten carbide (WC) second-stage cubes with a truncated edge length of 3 mm and an octahedral gasket with an edge length of 6 mm, we have successfully generated pressure over 20 GPa at room temperature. Since the high pressure limit can be pushed to nearly 100 GPa by using the sintered diamond second-stage cubes, our MA8 apparatus has a great potential to expand the current pressure capacity for precise low-temperature measurements with a large sample volume.
 Edited by: A. Goñi, A. Cantarero, J. S. Reparaz
Highlights
Pressure is a fundamental parameter like temperature that governs the states of matter
The single-stage cubic anvil cell (CAC) device developed in the Institute for Solid State Physics, the University of Tokyo (ISSP, UT) [7] is one typical MA apparatus that can generate hydrostatic pressures up to 15 GPa
We report the development of a two-stage MA8 apparatus for precise low-temperature physical property measurements in ISSP, UT
Summary
Pressure is a fundamental parameter like temperature that governs the states of matter. The single-stage cubic anvil cell (CAC) device developed in the Institute for Solid State Physics, the University of Tokyo (ISSP, UT) [7] is one typical MA apparatus that can generate hydrostatic pressures up to 15 GPa. The design of miniature “palm”-type CAC enabled integration with 3He or dilution refrigerator so as to reach temperatures as low as 10 mK [8, 9]. For the commonly used two-stage MA8 apparatus, the first-stage six anvils (three on the top and three on the bottom) made of hardened steel are usually built into a thick-wall steel ring (Kawai type) or contained in a removable cylindrical module (Walker type) [13] Such designs are not suitable for low-temperature applications because the whole MA8 device has to be inserted into a cryostat.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
