High-pressure developments for resonant X-ray scattering experiments at I16.

Area of Science:

• Condensed Matter Physics
• Materials Science
• X-ray Scattering Techniques

Background:

• High-pressure and low-temperature studies are crucial for understanding material properties.
• Resonant X-ray Scattering (RXS) offers unique insights into electronic and magnetic structures.
• Existing experimental setups may have limitations in achieving combined high pressure and low temperature.

Purpose of the Study:

• To present a novel experimental setup for performing high-pressure resonant X-ray scattering (RXS) experiments at low temperatures.
• To enable in-situ pressure measurement and material probing under extreme conditions.
• To facilitate studies of materials at cryogenic temperatures (30-300 K) and high pressures (up to 20 GPa).

Main Methods:

• Development of a membrane-driven diamond anvil cell (DAC) inspired by the Merrill-Bassett design.
• Integration of a panoramic dome and optical system for in-situ ruby fluorescence pressure measurement.
• Design for mounting on a 4 K closed-cycle cryostat, with low-temperature actuation via helium gas membrane.
• Utilizing a CuBe alloy (BERYLCO 25) for key components, ensuring a compact size (20-21 mm height, 57 mm diameter).

Main Results:

• Successful demonstration of a compact, integrated system for high-pressure, low-temperature RXS.
• Capability to probe various materials within a temperature range of 30-300 K and pressures up to 20 GPa.
• Preliminary experimental results validating the setup's performance under quasi-cryogenic conditions.

Conclusions:

• The presented experimental setup is a valuable tool for advancing research in condensed matter physics and materials science.
• It overcomes previous limitations by enabling simultaneous high-pressure and low-temperature RXS measurements.
• The system's design facilitates detailed investigation of material behavior under extreme conditions.