Disposable sample holder for high temperature measurements in MPMS superconducting quantum interference device...

Area of Science:

• Materials Science
• Condensed Matter Physics
• Quantum Technologies

Background:

• Superconducting Quantum Interference Device (SQUID) magnetometers require precise sample manipulation for accurate measurements.
• High-temperature measurements (300 K to 800 K) present challenges for sample holder design due to thermal expansion and material stability.
• Minimizing background signals is crucial for detecting weak magnetic responses.

Purpose of the Study:

• To present a novel, cost-effective sample holder for high-temperature SQUID magnetometry.
• To demonstrate the suitability of the holder for both solid and powder samples.
• To quantify the background signal contribution of the proposed sample holder.

Main Methods:

• Fabrication of a sample holder using readily available aluminum foil.
• Testing the holder's performance in a SQUID magnetometer across a temperature range of 300 K to 800 K.
• Characterization of the holder's magnetic homogeneity and background signal contribution.

Main Results:

• The aluminum foil sample holder is suitable for high-temperature (300 K < T < 800 K) SQUID measurements.
• The holder exhibits excellent magnetic homogeneity, resulting in a background signal below the instrument noise level (<10(-9) A m2 at μ(0)H=200 mT).
• The holder is inexpensive, simple to fabricate, and disposable, preventing cross-contamination.

Conclusions:

• A practical and economical sample holder for high-temperature SQUID magnetometry has been developed.
• The design effectively minimizes background noise, enhancing measurement sensitivity.
• The disposable nature of the holder offers convenience and ensures sample integrity for future experiments.