Pulsed versus DC I-V characteristics of resistive manganites

B. Fisher; J. Genossar; K. B. Chashka; L. Patlagan; G. M. Reisner

doi:10.1063/1.2194316

Pulsed versus DC I-V characteristics of resistive manganites

Strongly Correlated Electrons 2009-11-11 v1

Authors: B. Fisher , J. Genossar , K. B. Chashka , L. Patlagan , G. M. Reisner

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Abstract

We report on pulsed and DC I-V characteristics of polycrystalline samples of three charge-ordered manganites, Pr_{2/3}Ca_{1/3}MnO_3, Pr_{1/2}Ca_{1/2}MnO_3, Bi_{1/2}Sr_{1/2}MnO_3 and of a double-perovskite Sr_2MnReO_6, in a temperature range where their ohmic resistivity obeys the Efros-Shklovskii variable range hopping relation. For all samples, the DC I(V) exhibits at high currents negative differential resistance and hysteresis, which mask a perfectly ohmic or a moderately nonohmic conductivity obtained by pulsed measurements. This demonstrates that the widely used DC I-V measurements are usually misleading.

Keywords

manganites charge ordering I-V characteristics negative differential resistance Efros-Shklovskii variable range hopping pulsed measurements

Cite

@article{arxiv.cond-mat/0604049,
  title  = {Pulsed versus DC I-V characteristics of resistive manganites},
  author = {B. Fisher and J. Genossar and K. B. Chashka and L. Patlagan and G. M. Reisner},
  journal= {arXiv preprint arXiv:cond-mat/0604049},
  year   = {2009}
}

Comments

6 pages, 4 figures. Accepted for publication to APL

Pulsed versus DC I-V characteristics of resistive manganites

Abstract

Keywords

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