TITLE

# Voltage bias induced modification of the transport property of all oxide Pr0.5Ca0.5MnO3/SrTi0.95Nb0.05O3 junctions

AUTHOR(S)
Ghosh, Barnali; Das, K.; Raychaudhuri, A. K.
PUB. DATE
April 2011
SOURCE
Journal of Applied Physics;Apr2011, Vol. 109 Issue 8, p083934
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
In this paper we report what happens to a virgin oxide junction Pr0.5Ca0.5MnO3/SrTi0.95Nb0.05O3 (PCMO/Nb:STO), when it is subjected to cycling of voltage bias of moderate value (Â±4 V). It is found that the initial cycling leads to formation of a permanent state of lower resistance where the lower resistance arises predominantly due to the development of a shunt across the device film (PCMO). On successive voltage cycling with increasing magnitude, this state transforms into states of successive lower resistance that can be transformed back to the initial stable state on cycling to below a certain bias. A simple model based on p-n junction with shunt has been used to obtain information on the change of the junction on voltage cycling. It has been shown that the observation can be explained if the voltage cycling leads to lowering of the barrier at the interface and also reduction in series resistance. It is suggested that this lowering can be related to the migration of oxygen ions, which causes the vacancies at the junction region. Cross-sectional imaging of the junction shows formation of permanent filamentary bridges across the thickness of the PCMO after the virgin p-n junction is first taken through a voltage cycle, which would explain the appearance of a finite shunt across the p-n junction.
ACCESSION #
86444453

## Related Articles

• ADSORPTION REACTION OF POLAR ORGANIC MOLECULES ON ${\rm Si}^+_n$ CLUSTER IONS. Nakagawara, Wakana; Tsunoyama, Hironori; Furuya, Ari; Misaizu, Fuminori; Ohno, Koichi // International Journal of Modern Physics B: Condensed Matter Phys;7/10/2005, Vol. 19 Issue 15-17, p2502

We have examined chemical reactions of small silicon cluster ions ${\rm Si}^+_n$ for n = 7 - 16 with polar organic molecules M (M = CH3CN, CD3OD, C2H5CN, and C2H5OH). The intensities of the adsorption products ${\rm Si}_n {\rm M}^+_m$ for m = 1 and 2 were investigated as a function of n. We...

• Giant magnetostriction in Sm1-xNdxFe1.93 compounds. Hari Babu, V.; Markandeyulu, G.; Subrahmanyam, A. // Applied Physics Letters;6/18/2007, Vol. 90 Issue 25, p252513

The polycrystalline Sm1-xNdxFe1.93 (x=0, 0.08, 0.12, 0.16, 0.2, 0.24, 0.32, and 0.36) compounds are found to stabilize in MgCu2-type C15 cubic Laves phase structure. The compound x=0.12 is found to exhibit giant magnetostriction value of -1572Ã—10-6 due to the anisotropy compensation between...

• Acceptor, compensation, and mobility profiles in multiple Al implanted 4H-SiC. Giannazzo, F.; Roccaforte, F.; Raineri, V. // Applied Physics Letters;11/12/2007, Vol. 91 Issue 20, p202104

In this letter, we studied the effect of the annealing temperature (from 1400 to 1650 Â°C) on the acceptor, compensation, and mobility depth profiles in 4H-SiC implanted with multiple energy (40â€“550 keV) and medium dose (1Ã—1013 cm-2) Al ions. Scanning capacitance microscopy and...

• Study of thermal stability and luminescence quenching properties of bismuth-doped silicate glasses for fiber laser applications. Truong, V. G.; Bigot, L.; Lerouge, A.; Douay, M.; Razdobreev, I. // Applied Physics Letters;1/28/2008, Vol. 92 Issue 4, p041908

In the present work, we report on the luminescence properties of bismuth-doped silicate preforms and fibers under the influence of high temperature annealing and hydrogen-loading then annealing processes. Bismuth-related luminescence is found to be very sensitive to thermal annealing processes...

• Ba8Ga16Sn30 with type-I clathrate structure: Drastic suppression of heat conduction. Avila, M. A.; Suekuni, K.; Umeo, K.; Fukuoka, H.; Yamanaka, S.; Takabatake, T. // Applied Physics Letters;1/28/2008, Vol. 92 Issue 4, p041901

For the past decade, intermetallic clathrates have been rattling their way into mainstream research in thermoelectrics. The unusual vibrations of their guest ions inside oversized cages interfere with the cage phonons while leaving the electronic flow intact, providing an exotic way to achieve a...

• Relativistic Quantum Chemistry of Heavy Ions and Hadronic Atomic Systems: Spectra and Energy Shifts. Glushkov, A. V.; Khetselius, O.; Gurnitskaya, E.; Loboda, A.; Sukharev, D. // AIP Conference Proceedings;3/9/2009, Vol. 1102 Issue 1, p168

The levels energies and energy shifts are calculated for superheavy Li-like ions and some kaonic atoms on the basis of the gauge-invariant QED perturbation theory (PT) with an account of nuclear, exchange-correlation and radiative effects.

• Measurement of isotope ratio of Ca+ ions in a linear Paul Trap. Hashimoto, Y.; Minamino, K.; Nagamoto, D.; Hasegawa, S. // AIP Conference Proceedings;3/17/2009, Vol. 1104 Issue 1, p36

Measurement of isotope ratios of Calcium is very useful in many fields. So we demonstrated the measurement of isotope ratios of 40Ca+ (abundance 96.4%) to 44Ca+ (2.09%) ions in a linear Paul trap with several laser lights tuning to the isotope shifts. And we found that the experimental...

• Compositional and Structural Study of Gd Implanted ZnO Films. Murmu, Peter P.; Kennedy, John V.; Markwitz, Andreas; Ruck, Ben J. // AIP Conference Proceedings;7/23/2009, Vol. 1151 Issue 1, p185

We report a compositional and structural study of ZnO films implanted with 30 keV Gd ions. The depth profile of the implanted ions, measured by Rutherford backscattering spectrometry, matches predictions of DYNAMIC-TRIM calculations. However, after annealing at temperatures above 550Â° C the...

• Lanthanum-stabilized europium-doped cubic barium chloride: An efficient x-ray phosphor. Edgar, A.; Zimmermann, J.; von Seggern, H.; Varoy, C. R. // Journal of Applied Physics;Apr2010, Vol. 107 Issue 8, p083516

We report the photoluminescence and x-ray luminescence of lanthanum-stabilized cubic barium chloride with europium (Eu2+) doping, of general composition Ba1-x-yEuyLaxCl2+x. X-ray diffraction patterns confirm that the material adopts a cubic fluorite structure for x=0.125 and 0

Share