This study experimentally investigates the elastic properties of individual iron-gallium nanowires with and without an applied magnetic bias field. The experiments were conducted with a custom manipulator stage designed for use within a scanning electron microscope, where nanowires were mechanically tested both statically and dynamically. Experiments were also performed in the presence of a 20 Oe dc magnetic field in order to identify any variation in wire properties. The results suggest that iron-gallium nanowires possess an elastic modulus very similar to the macroscale value, tensile strengths of more than double the bulk material, and minor magnetic field induced stiffening at low stresses.
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The authors are grateful for the assistance of Dmitriy Dikin and Rodney Ruoff of Northwestern University in designing and constructing the nanomanipulator device. Yi Qi, Todd Brintlinger, and John Cumings of the University of Maryland were of great help in collecting the EDS data. This work was supported by the Office of Naval Research under Grant Nos. N000140610530 and N000140310954, and the National Science Foundation award No. CMS0330034.