Magnetoresistance in boron carbide junctions

Bernard, L.; Monson, J.; Sokolov, A.; Liu, Zong-Yuan; Yang, C.-S.; Dowben, P. A.; Doudin, B.; Harken, A.; Welsch, P.; Robertson, B. W.
November 2003
Applied Physics Letters;11/3/2003, Vol. 83 Issue 18, p3743
Academic Journal
Photoemission and electric transport properties of ferromagnet–insulator–ferromagnet junctions with boron carbide (C[sub 2]B[sub 10]) dielectric barrier are presented. Using a non-oxide barrier confidence avoids oxidation of the interfaces with the ferromagnetic layers. Photoemission confirms chemical abruptness of the interface. Magnetoresistance ratios reaching 50% are observed at low temperatures, and large nonlinearity in the current–voltage curves show that impurities in the junctions play a key role. © 2003 American Institute of Physics.


Related Articles

  • Applying Steinberg’s model to the Hugoniot elastic limit of porous boron carbide specimens. Brar, N. S.; Rosenberg, Z.; Bless, S. J. // Journal of Applied Physics;6/1/1991, Vol. 69 Issue 11, p7890 

    Presents a study which performed plate-impact experiments on boron carbide specimens to measure their Hugoniot elastic limit (HEL) values. Assumption of the Steinberg model used in the study; Decrease in HEL values; Methodology used in the study; Results.

  • The material of the distant future. Gower, Roger // Design Engineering;Apr98, p91 

    Provides information on boron carbide. Chemical properties of boron carbide; Industrial uses of the material; Powder pressing.

  • Determining the Energy Parameters of the Helium Accumulation Centers in Irradiated Boron Carbide from Thermodesorption Spectra. Svetukhin, V. V. // Technical Physics Letters;Feb2003, Vol. 29 Issue 2, p154 

    A model for description of the thermodesorption spectra is proposed and used to determine the energy parameters of the centers of helium accumulation in neutron-irradiated boron carbide. It is shown that helium accumulation centers broken at 100-150�C are characterized by a breakage...

  • The dielectric response of boron carbide due to hopping conduction. Zuppiroli, L.; Papandreou, N.; Kormann, R. // Journal of Applied Physics;7/1/1991, Vol. 70 Issue 1, p246 

    Presents a study that examined the dielectric response of boron carbide to hopping conduction. Information on the structure and direct current transport in boron carbide; Measurement of the electrical conductivity of boron carbide; Determination of the dielectric constant of boron carbide.

  • Effect of laser fluence on the deposition and hardnessof boron carbide thin films. Kokai, F.; Taniwaki, M.; Ishihara, M.; Koga, Y. // Applied Physics A: Materials Science & Processing;2002, Vol. 74 Issue 4, p533 

    We deposited amorphous thin films of boron carbide by pulsed laser deposition using a B[sub 4] C target at room temperature. As the laser fluence increased from 1 to 3 J/cm[sup 2] , the number of 0.25–5 μm particulates embedded in the films decreased, and the B/C atomic ratio of the...

  • Nanoscale friction and wear mechanisms at the interface between a boron carbide film and an... Prioli, R.; Reigada, D. C. // Journal of Applied Physics;2/1/2000, Vol. 87 Issue 3, p1118 

    Presents information on a study which investigated the modifications of the nanoscale tribological properties of boron carbide films. Experimental procedures; Results and discussion; Theoretical calculation of energy dissipation; Conclusions.

  • Non-stoichiometric boron carbide synthesized in moderate temperature conditions. SUN, G.; LI, Y. W.; HU, Q. K.; WU, Q. H.; YU, D. L. // Materials Science (0137-1339);2009 Part 1 of 2, Vol. 27 Issue 4, p1033 

    Non-stoichiometric boron carbide was successfully synthesized through a chemical synthetic route by using tribromide and carbon tetrachloride as reactants and metal sodium as co-reductant at 700 °C. The synthesized sample was characterized by X-ray powder diffraction, transmission selected...

  • 40 YEARS AGO . . .  // Advanced Materials & Processes;Feb2009, Vol. 167 Issue 2, p88 

    The article "Processing Success Story: Boron Carbide Body Armor," by John V. Hansen, is reprinted from an earlier issue of "Advanced Materials & Processes." The article looks at the use of high-density boron carbide in bullet-proof vests for pilots of tactical aircraft. The author discusses...

  • Formation of a solid lubricant in boron carbide by nitrogen ion implantation and laser annealing. Reeber, Robert R.; Kusy, Robert P.; Yu, Ning; Chu, Wei-Kan // Applied Physics Letters;3/12/1990, Vol. 56 Issue 11, p1075 

    A boron nitride(lubricant)/boron carbide composite (approximately 70% boron nitride) has been formed in approximately the first 750 Å of surface and near-surface regions of a polycrystalline boron carbide sample by implanting nitrogen (N) ions at 100 keV with a total dose of 4×1017 N...


Read the Article


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

Try another library?
Sign out of this library

Other Topics