Nonequilibrium 1f noise in low-doped manganite single crystals

X. D. Wu; B. Dolgin; G. Jung; V. Markovich; Y. Yuzhelevski; M. Belogolovskii; Ya M. Mukovskii

doi:10.1063/1.2748083

Nonequilibrium 1f noise in low-doped manganite single crystals

X. D. Wu
, B. Dolgin
, G. Jung
, V. Markovich
, Y. Yuzhelevski
, M. Belogolovskii
, Ya M. Mukovskii

Department of Physics

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

1f noise in current biased La0.82 Ca0.18 Mn O3 crystals has been investigated. The temperature dependence of the noise follows the resistivity changes with temperature, suggesting that resistivity fluctuations constitute a fixed fraction of the total resistivity, independently of the dissipation mechanism and magnetic state of the system. The noise scales as a square of the current as expected for equilibrium resistivity fluctuations. However, at 77 K at bias exceeding some threshold, the noise intensity starts to decrease with increasing bias. The appearance of nonequilibrium noise is interpreted in terms of bias dependent multistep indirect tunneling.

Original language	English
Article number	242110
Journal	Applied Physics Letters
Volume	90
Issue number	24
DOIs	https://doi.org/10.1063/1.2748083
State	Published - 22 Jun 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2748083

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title = "Nonequilibrium 1f noise in low-doped manganite single crystals",

abstract = "1f noise in current biased La0.82 Ca0.18 Mn O3 crystals has been investigated. The temperature dependence of the noise follows the resistivity changes with temperature, suggesting that resistivity fluctuations constitute a fixed fraction of the total resistivity, independently of the dissipation mechanism and magnetic state of the system. The noise scales as a square of the current as expected for equilibrium resistivity fluctuations. However, at 77 K at bias exceeding some threshold, the noise intensity starts to decrease with increasing bias. The appearance of nonequilibrium noise is interpreted in terms of bias dependent multistep indirect tunneling.",

author = "Wu, \{X. D.\} and B. Dolgin and G. Jung and V. Markovich and Y. Yuzhelevski and M. Belogolovskii and Mukovskii, \{Ya M.\}",

year = "2007",

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day = "22",

doi = "10.1063/1.2748083",

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T1 - Nonequilibrium 1f noise in low-doped manganite single crystals

AU - Wu, X. D.

AU - Dolgin, B.

AU - Jung, G.

AU - Markovich, V.

AU - Yuzhelevski, Y.

AU - Belogolovskii, M.

AU - Mukovskii, Ya M.

PY - 2007/6/22

Y1 - 2007/6/22

N2 - 1f noise in current biased La0.82 Ca0.18 Mn O3 crystals has been investigated. The temperature dependence of the noise follows the resistivity changes with temperature, suggesting that resistivity fluctuations constitute a fixed fraction of the total resistivity, independently of the dissipation mechanism and magnetic state of the system. The noise scales as a square of the current as expected for equilibrium resistivity fluctuations. However, at 77 K at bias exceeding some threshold, the noise intensity starts to decrease with increasing bias. The appearance of nonequilibrium noise is interpreted in terms of bias dependent multistep indirect tunneling.

AB - 1f noise in current biased La0.82 Ca0.18 Mn O3 crystals has been investigated. The temperature dependence of the noise follows the resistivity changes with temperature, suggesting that resistivity fluctuations constitute a fixed fraction of the total resistivity, independently of the dissipation mechanism and magnetic state of the system. The noise scales as a square of the current as expected for equilibrium resistivity fluctuations. However, at 77 K at bias exceeding some threshold, the noise intensity starts to decrease with increasing bias. The appearance of nonequilibrium noise is interpreted in terms of bias dependent multistep indirect tunneling.

UR - https://www.scopus.com/pages/publications/34250673247

U2 - 10.1063/1.2748083

DO - 10.1063/1.2748083

M3 - Article

AN - SCOPUS:34250673247

SN - 0003-6951

VL - 90

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 24

M1 - 242110

ER -

Nonequilibrium 1f noise in low-doped manganite single crystals

Abstract

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