NUCLEAR-MAGNETIC-RESONANCE IN A DIAMOND-ANVIL CELL AT VERY HIGH-PRESSURES

We describe a novel design to study the nuclear magnetic resonance (NM R) propel-ties of materials at high pressure in a diamond anvil cell. A split gasket is used to pressurize the sample and a single turn coil couples the rf field with the sample. Due to the large filling factor , this method has a significantly increased sensitivity compared to pr eviously used techniques and should allow NMR study of materials in a diamond anvil cell into the megabar region. We demonstrate the system with a measurement of the spin-lattice relaxation (T-1) of cyclohexane as a function of pressure at 79 K up to 9.7 GPa. We have also pressur ized a sample of hydrogen to 26 GPa. (C) 1998 American Institute of Ph ysics.