TITLE

Large magnetoresistances and non-Ohmic conductivity in EuWO1+xN2-x

AUTHOR(S)
Kusmartseva, A.; Yang, M.; Oró-Solé, J.; Bea, A. M.; Fuertes, A.; Attfield, J. P.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p022110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magnetic field and voltage dependent electronic transport properties of EuWO1+xN2-x ceramics are reported. Large negative magnetoresistances are observed at low temperatures, up to 70% in the least doped (x=0.09) material. Non-Ohmic conduction emerges below the 12 K Curie transition. This is attributed to a microstructure of ferromagnetic conducting and antiferromagnetic insulating regions resulting from small spatial fluctuations in the chemical doping.
ACCESSION #
43277352

 

Related Articles

  • Non-Markovian Theory of Electron Paramagnetic Resonance in Localized and Quasi-Localized Electron Spins via an Example of Manganites with Colossal Magnetoresistance. Khalvashi, E. Kh. // Journal of Experimental & Theoretical Physics;Feb2005, Vol. 100 Issue 2, p398 

    An approach based on the memory functions formalism is applied to derive non-Markovian equations of motion for the magnetization components of localized and quasi-localized electron spins under electron paramagnetic resonance (EPR) conditions using the example of manganites with colossal...

  • Temperature Dependence of Indium-Arsenide Longitudinal Magnetoresistance. Gadzhialiev, M. M.; Pirmagomedov, Z. Sh. // Russian Physics Journal;Feb2005, Vol. 48 Issue 2, p210 

    Studies the electron dependence of indium-arsenide longitudinal magnetoresistance. Quantum oscillation extremes of longitudinal magnetoresistance; Formula for quantizing magnetic field; Occurrence of longitudinal magnetoresistance where scattering flips the electron spin.

  • Weak-field measurements in crystals with low symmetry. Kyriakos, D. S. // Applied Physics Letters;1984, Vol. 45 Issue 4, p378 

    This letter concerns a generalization of the method presented in recent papers for the determination of the galvanomagnetic coefficients, especially those of magnetoresistance, for the case of crystals with low symmetry. The central idea is the search of one of the principal directions of the...

  • Magnetoresistance of UPt3. T. Lippman; J. Davis; H. Choi; J. Pollanen; W. Halperin // Journal of Low Temperature Physics;Sep2007, Vol. 148 Issue 5/6, p863 

    Abstract   We have performed measurements of the temperature dependence of the magnetoresistance up to 9 T in bulk single crystals of UPt3 with the magnetic field along the b-axis, the easy magnetization axis. We have confirmed previous results for transverse...

  • Magnetoresistive signal isolators employing linear spin-valve sensing resistors. Qian, Zhenghong; Wang, Dexin; Daughton, Jim; Tondra, Mark; Lange, Erik; Nordman, Cathy; Popple, Anthony; Myers, John; Schuetz, Jim // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p6870 

    Feasibility of fabricating low power, high-speed, magnetoresistive signal isolators employing linear spin-valve resistors as sensing elements has been demonstrated. In the fabricated prototype digital isolators, linear spin-valve resistors are physically isolated from an on-chip coil by an 11...

  • Junction area dependence of breakdown characteristics in magnetic tunnel junctions. Kim, Kwang-Seok; Cho, B. K.; Kim, T. W.; Park, W. J. // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p8364 

    Breakdown characteristics of the magnetic tunnel junctions (MTJ) with different junction areas of S = 200 μm[SUP2] and S = 0.5 μm[SUP2] are investigated under constant voltage stress. The breakdown process is found to be quite different for the two junction areas. For the large junctions...

  • Tunable magnetoresistance devices based on multiferroic heterostructures. Liu, Ming; Obi, Ogheneyunume; Lou, Jing; Li, Shandong; Xing, Xing; Yang, Guomin; Sun, Nian X. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07D913 

    Surface-effect induced strong magnetoelectric (ME) coupling was investigated in ultrathin Ni80Fe20/PZN-PT (lead zinc niobate-lead titanate) multiferroic heterostructures. Giant electric field (E-field) tuning of the magnetic anisotropy, ferromagnetic resonance field, coercive field and...

  • Magnetic tunnel junctions with large tunneling magnetoresistance and small saturation fields. Egelhoff, Jr., W. F.; Höink, V. E.; Lau, J. W.; Shen, W. F.; Schrag, B. D.; Xiao, G. // Journal of Applied Physics;May2010, Vol. 107 Issue 9, p09C705-1 

    There is a continuing need for greater sensitivity in magnetic tunnel junction (MTJ) sensors. We have found a new approach to achieving large tunneling magnetoresistance (TMR) with a very soft free layer. The high TMR is achieved by conventional means of annealing a bottom pinned MTJ that has Ta...

  • Upper critical field and thermally activated flux flow in LaFeAsO1-xFx. Shahbazi, M.; Wang, X. L.; Shekhar, C.; Srivastava, O. N.; Lin, Z. W.; Zhu, J. G.; Dou, S. X. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07E162 

    The magneto-resistance, critical current density, Jc, upper critical field, Hc2, and flux pinning properties of LaFeAsO1-xFx superconductors were investigated systematically by magnetic and magneto-transport measurements in the fields up to 13 T over a temperature range of 5-35 K. It was found...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics