Nuclear Magnetic Resonance Probe Head Design for Precision Strain Control

Authors :: Kissikov, T.
Sarkar, R.
Bush, B. T.
Lawson, M.
Canfield, P. C.
Curro, N. J.
Source :: Rev. Sci. Instrum. vol. 88, pg. 103902 (2017)
Publication Year :: 2017
Abstract: We present the design and construction of an NMR probe to investigate single crystals under strain at cryogenic temperatures. The probe head incorporates a piezoelectric-based apparatus from Razorbill Instruments that enables both compressive and tensile strain tuning up to strain values on the order of 0.3% with a precision of 0.001%. $^{75}$As NMR in BaFe$_2$As$_2$ reveals large changes to the electric field gradient, and indicates that the strain is homogeneous to within 16% over the volume of the NMR coil.<br />Comment: 9 figures