Charge transport in a CoPt3 nanocrystal microwire

Beecher, P.; De Marzi, G.; Quinn, A. J.; Redmond, G.; Shevchenko, E. V.; Weller, H.
December 2004
Applied Physics Letters;12/6/2004, Vol. 85 Issue 23, p5706
Academic Journal
The electrical characteristics of single CoPt3 nanocrystal microwires formed by magnetic field-directed growth from colloidal solutions are presented. The wires comprise disordered assemblies of discrete nanocrystals, separated from each other by protective organic ligand shells. Electrical data indicate that the activated charge transport properties of the wires are determined by the nanocrystal charging energy, governed by the size and capacitance of the individual nanocrystals. Focused ion beam-assisted deposition of Pt metal at the wire-electrode junctions is employed to optimize the wire-electrode contacts, whilst maintaining the nanocrystal-dominated transport characteristics of these one-dimensional nanocrystal structures.


Related Articles

  • Modification of Co/Pt multilayers by gallium irradiation—Part 2: The effect of patterning using a highly focused ion beam. Warin, P.; Hyndman, R.; Glerak, J.; Chapman, J. N.; Ferre´, J.; Jamet, J. P.; Mathet, V.; Chappert, C. // Journal of Applied Physics;10/15/2001, Vol. 90 Issue 8, p3850 

    The local and collective behavior of magnetic arrays fabricated by focused ion beam (FIB) patterning of a Co/Pt multilayer is described. The arrays comprised 1 μm nonirradiated square elements separated by narrow lines which were written using the FIB. While the square elements supported...

  • Clocking magnetic field-coupled devices by domain walls. Csaba, György; Kiermaier, Josef; Becherer, Markus; Breitkreutz, Stephan; Ju, Xueming; Lugli, Paolo; Schmitt-Landsiedel, Doris; Porod, Wolfgang // Journal of Applied Physics;Apr2012, Vol. 111 Issue 7, p07E337 

    We study the interaction between propagating domain walls in permalloy nanowires and nanomagnetic dots made of Co/Pt multilayers. The magnetic behavior of dots placed above/below the domain wall conductor is strongly influenced by the field of the wall. Using micromagnetic simulations we show...

  • Focused-ion-beam-induced deposition of superconducting nanowires. Sadki, E. S.; Ooi, S.; Hirata, K. // Applied Physics Letters;12/20/2004, Vol. 85 Issue 25, p6206 

    Superconducting nanowires, with a critical temperature of 5.2 K, have been synthesized using an ion-beam-induced deposition, with a gallium focused ion beam and tungsten carboxyl, W(CO)6, as precursor. The films are amorphous, with atomic concentrations of about 40%, 40%, and 20% for W, C, and...

  • Weak-antilocalization signatures in the magnetotransport properties of individual electrodeposited Bi Nanowires. Marcano, N.; Sangiao, S.; Plaza, M.; Pérez, L.; Pacheco, A. Fernández; Córdoba, R.; Sánchez, M. C.; Morellón, L.; Ibarra, M. R.; De Teresa, J. M. // Applied Physics Letters;Feb2010, Vol. 96 Issue 8, p082110 

    We study the electrical resistivity of individual Bi nanowires of diameter 100 nm fabricated by electrodeposition using a four-probe method in the temperature range 5–300 K with magnetic fields up to 90 kOe. Low-resistance Ohmic contacts to individual Bi nanowires are achieved using a...

  • Magnetic field measurement of RIKEN IRC sector magnets. Ohnishi, J.; Mitsumoto, T.; Goto, A.; Yano, Y. // AIP Conference Proceedings;2001, Vol. 600 Issue 1, p351 

    Magnetic field measurements of the RIKEN IRC sector magnets were made with a newly constructed field mapping system. Using mapping data of the base and trim coil fields for several field levels, production of the isochronous field for a typical ion beam was attempted and the measured field was...

  • Propagation of a narrow plasma beam in an oblique magnetic field. Heidbrink, W. W.; Adams, D.; Drum, S.; Evans, K.; Manson, J.; Price, T.; Urayama, P.; Wessel, F. J. // Physics of Fluids B: Plasma Physics;Oct92, Vol. 4 Issue 10, p3454 

    The propagation of an intense neutralized ion beam (ν ∼ 5 × 10[sup 8] cm/sec, n ∼ 10[sup 10] cm[sup -3]) through a large insulated vacuum chamber is measured as a function of magnetic field strength and direction. When the beam propagates parallel to the applied field, beam...

  • Z-discharge transport of intense ion beams for inertial confinement fusion. Ottinger, P. F.; Rose, D.V.; Mosher, D.; Neri, J. M. // Journal of Applied Physics;11/15/1991, Vol. 70 Issue 10, p5292 

    Evaluates light ion beam transport in a wall-stabilized z-discharge channel, where the discharge azimuthal magnetic field radially confines the ion beam. Determination of the injection efficiency under various conditions; Transport schemes for a light-ion laboratory microfusion facility;...

  • Investigation of artificial domains realized by local gallium focused ion-beam modification of Pt/Co/Pt trilayer structures. Aziz, A.; Bending, S. J.; Roberts, H.; Crampin, S.; Heard, P. J.; Marrows, C. H. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08C504 

    We present the results of experimental investigations of magnetic switching and magnetotransport in a generation of magnetic devices containing artificially patterned domains. Our devices are realized by locally reducing the coercive field of a perpendicularly magnetized Pt(3.5 nm)/Co(0.5...

  • Defect induced formation of CoSi2 nanowires by focused ion beam synthesis. Akhmadaliev, C.; Schmidt, B.; Bischoff, L. // Applied Physics Letters;11/27/2006, Vol. 89 Issue 22, p223129 

    Cobalt implantation with a focused ion beam (FIB) was applied to study ion beam synthesis of cobalt disilicide nanowires in silicon. Two mechanisms of CoSi2 nanowire formation were investigated: (a) conventional synthesis by Co++ FIB implantation at elevated temperatures into silicon along...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics