High-pressure generation using double stage micro-paired diamond anvils shaped by focused ion beam

Area of Science:

• Materials Science
• High-Pressure Physics
• Nanotechnology

Background:

• Achieving ultra-high pressures requires specialized diamond anvil cells.
• Fabricating and aligning micron-sized anvils presents significant challenges.
• Previous methods lacked precision in controlling anvil shape and sample placement.

Purpose of the Study:

• To develop a reproducible micro-fabrication method for micron-sized diamond anvils.
• To demonstrate the generation of ultra-high pressures using these novel anvils.
• To overcome the difficulties in aligning micro-anvils for high-pressure experiments.

Main Methods:

• Utilizing a focused ion beam (FIB) system for micron-sized diamond anvil processing.
• Employing the paired micro-anvil method to solve alignment issues.
• Confirming high pressure generation using the double stage diamond anvil cell technique.
• Evaluating pressure distribution with synchrotron micro-X-ray beams.

Main Results:

• Successfully processed micron-sized diamond anvils with a 3 μm culet using FIB.
• Achieved reproducible generation of pressures exceeding 300 GPa.
• Demonstrated precise control over anvil shape and sample assembly in confined spaces.
• Confirmed the effectiveness of the paired micro-anvil method for alignment.

Conclusions:

• Focused ion beam micro-manufacturing offers precise control for creating advanced diamond anvils.
• The paired micro-anvil method is a viable solution for ultra-high pressure research.
• This reproducible technique enables new possibilities in materials science and condensed matter physics.