title: The determination of ionic transport properties at high pressures in a diamond anvil cell.
abstract: A two-electrode configuration was adopted in an in situ impedance measurement system to determine the ionic conductivity at high pressures in a diamond anvil cell. In the experimental measurements, Mo thin-films were specifically coated on tops of the diamond anvils to serve as a pair of capacitance-like electrodes for impedance spectrum measurements. In the spectrum analysis, a Warburg impedance element was introduced into the equivalent circuit to reveal the ionic transport property among other physical properties of a material at high pressures. Using this method, we were able to determine the ionic transport character including the ionic conductivity and the diffusion coefficient of a sodium azide solid to 40 GPa.
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
authors.forename: Cailong
authors.initials: C
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Han
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
authors.forename: Chunxiao
authors.initials: C
authors.lastname: Gao
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Changchun 130012, China.
authors.forename: Yanzhang
authors.initials: Y
authors.lastname: Ma