Electrical transport study of magnetomechanical nanocontact in ultrahigh vacuum using carbon nanowalls

Chi Zhang; Ying Wang; Leihua Huang; Yihong Wu
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p062102
Academic Journal
We present the results of an experimental study on a magnetomechanical nanocontact in ultrahigh vacuum, which is formed between a Ni nanoprobe and carbon nanowalls. The latter are thin graphite sheets grown almost vertically on a SiO2/Si substrate which greatly facilitates the formation of nanocontacts with adjustable contact size. Very large magnetoresistance with well-defined hysteresis and reproducibility has been observed at room temperature, which is interpreted as being caused by the magnetomechanical effect. Instead of functioning merely as an on/off switch, the linear response to an external field within a finite range makes this kind of nanocontact potentially also useful for sensing applications.


Related Articles

  • Growth mechanisms of carbon nanotubes using controlled production in ultrahigh vacuum. Ho¨vel, H.; Bo¨decker, M.; Grimm, B.; Rettig, C. // Journal of Applied Physics;7/15/2002, Vol. 92 Issue 2, p771 

    We present a method for the preparation of single walled carbon nanotubes (SWNTs) on a highly oriented pyrolytic graphite (HOPG) surface in ultrahigh vacuum (UHV), for which the preparation parameters for the production of metal clusters, fixed to nanometer sized pits on the surface, and the...

  • Magnetoresistance of very thin cobalt-gold multilayers with perpendicular anisotropy. Dupas, C.; Renard, J. P.; Seiden, J.; Vélu, E.; Renard, D. // Journal of Applied Physics;4/15/1988, Vol. 63 Issue 8, p4300 

    Presents a study that reported magnetoresistance measurements on gold/cobalt/gold sandwiches and gold/cobalt/gold multilayers deposited on polished glass substrates in ultrahigh vacuum. Discussion of previous SQUID measurements of remanent magnetization parallel and perpendicular to the film...

  • Using C[sub 60] molecules for deep carbonization of rhenium in ultrahigh vacuum. Gall�, R. N.; Rut�kov, E. V.; Tontegode, A. Ya.; Usufov, M. M. // Technical Physics Letters;Dec97, Vol. 23 Issue 12, p911 

    The adsorption of C[sub 60] molecules on the surface of a rhenium ribbon heated to 1800 K is investigated quantitatively. It is found that the C[sub 60] molecules are adsorbed without reflection and then dissociate, and the carbon formed in the process is dissolved in the bulk of the rhenium to...

  • Interaction of C[sub 60] molecules with a (100) Mo surface. Gall�, N. R.; Rut�kov, E. V.; Tontegode, A. Ya.; Usufov, M. M. // Technical Physics;Nov99, Vol. 44 Issue 11, p1371 

    The adsorption, initial stages of film growth, and transformation of an adlayer of C[sub 60] molecules on a (100) Mo surface upon heating are studied under ultrahigh-vacuum conditions. It is shown that the C[sub 60] molecules remain intact in the adsorbed state up to 760 K. Layer-by-layer growth...

  • Structural and electrical characterization of room temperature ultra-high-vacuum compatible SiO2 for gating scanning tunneling microscope-patterned devices. Scappucci, G.; Ratto, F.; Thompson, D. L.; Reusch, T. C. G.; Pok, W.; Rueß, F. J.; Rosei, F.; Simmons, M. Y. // Applied Physics Letters;11/26/2007, Vol. 91 Issue 22, p222109 

    We present an ultrahigh vacuum technique for depositing SiO2 at room temperature using an atomic oxygen source and Si coevaporation for ultimate use as a dielectric for gating Si devices with atomically precise dopant profiles. The resulting SiO2 layers were characterized in situ by scanning...

  • Formation of flat, relaxed Si1-xGex alloys on Si(001) without buffer layers. Hong, S.; Kim, H.-W.; Bae, D. K.; Song, S. C.; Lee, G.-D.; Yoon, E.; Kim, C. S.; Foo, Y. L.; Greene, J. E. // Applied Physics Letters;3/20/2006, Vol. 88 Issue 12, p122103 

    Atomically flat, fully strained Si1-xGex layers with thicknesses ranging from 40 to 240 nm were grown on Si(001) at 450 °C by ultrahigh-vacuum chemical vapor deposition and subjected to annealing at 1000 °C for 20 min to induce relaxation. In order to minimize surface diffusion during...

  • Temperature effect on magnetoresistance in Co/Ru sandwiches. Dinia, A.; Zoll, S.; Ounadjela, K. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p6548 

    Provides information on a study which examined the effect of temperature on magnetoresistance (MR) in cobalt ruthenium (CoRu) sandwiches. Growth of CoRu sandwiches by ultrahigh vacuum evaporation; Measurement of MR; Mr behaviors in CoRu sandwiches.

  • Intensity oscillations in reflection high-energy electron diffraction during molecular beam epitaxy of Ni on W(110). Koziol, C.; Lilienkamp, G.; Bauer, E. // Applied Physics Letters;9/21/1987, Vol. 51 Issue 12, p901 

    Reflection high-energy electron diffraction intensities during molecular beam epitaxy growth of Ni on W(110) were studied. The damping and polar angle dependence of the observed oscillations are discussed. Intensity oscillations during preparation of a Ni/Cu superlattice are also reported.

  • Growth of single crystal NiSi2 layers on Si (110). Tung, R. T.; Nakahara, S.; Boone, T. // Applied Physics Letters;5/1/1985, Vol. 46 Issue 9, p895 

    Growth of single crystal nickel silicide layers on Si (110) under ultrahigh vacuum conditions is demonstrated. Formation of thin templates followed by deposition of nickel at ˜650 °C produced NiSi[sub 2] layers with Χ[sub min] = 3%. Low-energy electron diffraction revealed...


Read the Article


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

Try another library?
Sign out of this library

Other Topics