@article{jarausch_kiely_houston_russell_2000, title={Defect-dependent elasticity: Nanoindentation as a probe of stress state}, volume={15}, ISSN={["2044-5326"]}, DOI={10.1557/JMR.2000.0244}, abstractNote={Using an interfacial force microscope, the measured elastic response of 100-nm-thick Au films was found to be strongly correlated with the films' stress state and thermal history. Large, reversible variations (2×) of indentation modulus were recorded as a function of applied stress. Low-temperature annealing caused permanent changes in the films' measured elastic properties. The measured elastic response was also found to vary in close proximity to grain boundaries in thin films and near surface steps on single-crystal surfaces. These results demonstrate a complex interdependence of stress state, defect structure, and elastic properties in thin metallic films.}, number={8}, journal={JOURNAL OF MATERIALS RESEARCH}, author={Jarausch, KF and Kiely, JD and Houston, JE and Russell, PE}, year={2000}, month={Aug}, pages={1693–1701} } @article{kiely_jarausch_houston_russell_1999, title={Initial stages of yield in nanoindentation}, volume={14}, ISSN={["0884-2914"]}, DOI={10.1557/JMR.1999.0298}, abstractNote={We have used the interfacial force microscope to perform nanoindentations on Au single-crystal surfaces. We have observed two distinct regimes of plastic deformation, which are distinguished by the magnitude of discontinuities in load relaxation. At lower stresses, relaxation occurs in small deviations from elastic behavior, while at the higher stresses they take the form of large load drops, often resulting in complete relaxation of the applied load. These major events create a relatively wide plastic zone that subsequently deepens more rapidly than it widens. We discuss these findings in terms of contrasting models of dislocation processes in the two regimes.}, number={6}, journal={JOURNAL OF MATERIALS RESEARCH}, author={Kiely, JD and Jarausch, KF and Houston, JE and Russell, PE}, year={1999}, month={Jun}, pages={2219–2227} } @article{russell_stark_griffis_phillips_jarausch_1998, title={Chemically and geometrically enhanced focused ion beam micromachining}, volume={16}, ISSN={["1071-1023"]}, DOI={10.1116/1.590197}, abstractNote={Improvements in focused ion beam (FIB) material removal rates utilizing geometric and chemical enhancement were investigated. Geometrical optimization of FIB micromachining of Permalloy and diamond was investigated to determine the magnitude of material removal rate gains that could be attained by increasing the angle of the ion beam with respect to the sample surface normal. The combination of geometrical optimization with chemical enhancement (C2Cl4 for Permalloy and H2O and XeF2 for diamond) was then investigated to determine whether additional gains in material removal rate could be attained. FIB sharpening of a diamond nanoindenter tip is also presented as a practical example of diamond micromachining with H2O as the removal rate enhancing species.}, number={4}, journal={JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B}, author={Russell, PE and Stark, TJ and Griffis, DP and Phillips, JR and Jarausch, KF}, year={1998}, pages={2494–2498} } @article{cederberg_olson_larson_rakness_jarausch_schmidt_borovsky_larson_nelson_1998, title={Nuclear electric quadrupole moment of Li-6}, volume={57}, ISSN={["1094-1622"]}, DOI={10.1103/PhysRevA.57.2539}, abstractNote={The molecular beam electric resonance technique has been used to examine the hyperfine spectrum of ${}^{6}{\mathrm{Li}}^{19}\mathrm{F}$ for the purpose of obtaining an improved value of the ratio of the electric quadrupole moments of the two lithium nuclei. A total of 29 transitions in vibrational states 0-2 and rotational states 1-4 have been included in a fit to determine the Li nuclear quadrupole interaction along with the magnetic spin-rotation and spin-spin interactions. The magnetic interactions are consistent with values calculated from the previously reported ${}^{7}{\mathrm{Li}}^{19}\mathrm{F}$ values, but those have been refitted to take advantage of the new information from ${}^{6}{\mathrm{Li}}^{19}\mathrm{F}$. The electric quadrupole moment ratio of the two lithium isotopes determined from measurements on the two forms of LiF is ${Q(}^{6}\mathrm{Li}{)/Q(}^{7}\mathrm{Li})=0.020161\ifmmode\pm\else\textpm\fi{}0.000013$ (one standard deviation estimate).}, number={4}, journal={PHYSICAL REVIEW A}, author={Cederberg, J and Olson, D and Larson, J and Rakness, G and Jarausch, K and Schmidt, J and Borovsky, B and Larson, P and Nelson, B}, year={1998}, month={Apr}, pages={2539–2543} }