Measuring material susceptibility using NMR.

Area of Science:

• Materials Science
• Analytical Chemistry
• Physics

Background:

• High-field magnetic susceptibility measurements are vital for characterizing materials.
• Standard methods often require specialized equipment.
• Accurate susceptibility values are essential for advanced applications like NMR probe design.

Purpose of the Study:

• To introduce a novel, accessible method for measuring high-field magnetic susceptibilities.
• To demonstrate the technique's accuracy and sensitivity using copper samples.
• To assess the method's utility in evaluating materials for NMR applications.

Main Methods:

• Utilized a standard Nuclear Magnetic Resonance (NMR) system with pulsed field gradients.
• Measured volumetric susceptibility of 99.9% copper wires with varying diameters (0.16-0.79 mm).
• Compared experimental results with established literature values for pure copper.

Main Results:

• Achieved accurate measurement of copper's volumetric susceptibility (χ=-9.5±0.2·10⁻⁶).
• Experimental results closely matched the literature value for pure copper (-9.6·10⁻⁶).
• Demonstrated the technique's sensitivity and quantitative capabilities.

Conclusions:

• The developed NMR method provides a reliable and accessible means to measure magnetic susceptibility.
• This technique is suitable for validating materials, particularly those intended for "zero-susceptibility" applications in NMR.
• The method aids in the development and quality control of components for high-resolution NMR probes.