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Title: Colossal electroresistance and magnetoresistance effect in polycrystalline perovskite cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3)

Abstract

Highlights: ► Samples of cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} were synthesized by solid state reaction method. ► Different currents were applied to study the electroresistance effect. ► Resistivity of the samples decrease dramatically with increase of the currents. ► Non-linear current–voltage (I–V) characteristics are observed. ► Current can have influence on the low field magnetoresistance of the samples. - Abstract: Polycrystalline samples of cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3) with the perovskite structure were synthesized by conventional solid state reaction method. Different currents ranging from 1 μA to 1 mA were applied to study the electroresistance (ER) effect. Temperature dependence of resistivity for the samples decrease dramatically with increase of the currents in the low temperature and non-linear current–voltage (I–V) characteristics are observed. The maximum ER ratio (defined as ER = (ρ{sub 1} {sub mA} − ρ{sub L})/ρ{sub L} × 100%) of the all samples is more than −99%, which indicates a colossal electroresistance (CER) effect has found in these compounds. What is more, we also found that electric current can have influence on the low field magnetoresistance (LFMR) of the samples. LFMR decrease with the increase of applied current. The experimental results were discussed bymore » spin polarized carriers modified ferromagnetic (FM)/nonmagnetic (NM) interface and grain interior phase separation scenario.« less

Authors:
; ;  [1];  [1];  [1]
  1. Key Laboratory of Optoelectronic Material and Device, Shanghai Normal University, 200234 Shanghai (China)
Publication Date:
OSTI Identifier:
22290381
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 48; Journal Issue: 3; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; ELECTRIC CURRENTS; MAGNETORESISTANCE; PEROVSKITE; POLYCRYSTALS; SPIN ORIENTATION; SYNTHESIS; TEMPERATURE DEPENDENCE

Citation Formats

Zhang, Li, Li, Xia, Wang, Feifei, Wang, Tao, and Shi, Wangzhou. Colossal electroresistance and magnetoresistance effect in polycrystalline perovskite cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3). United States: N. p., 2013. Web. doi:10.1016/J.MATERRESBULL.2012.11.105.
Zhang, Li, Li, Xia, Wang, Feifei, Wang, Tao, & Shi, Wangzhou. Colossal electroresistance and magnetoresistance effect in polycrystalline perovskite cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3). United States. https://doi.org/10.1016/J.MATERRESBULL.2012.11.105
Zhang, Li, Li, Xia, Wang, Feifei, Wang, Tao, and Shi, Wangzhou. 2013. "Colossal electroresistance and magnetoresistance effect in polycrystalline perovskite cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3)". United States. https://doi.org/10.1016/J.MATERRESBULL.2012.11.105.
@article{osti_22290381,
title = {Colossal electroresistance and magnetoresistance effect in polycrystalline perovskite cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3)},
author = {Zhang, Li and Li, Xia and Wang, Feifei and Wang, Tao and Shi, Wangzhou},
abstractNote = {Highlights: ► Samples of cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} were synthesized by solid state reaction method. ► Different currents were applied to study the electroresistance effect. ► Resistivity of the samples decrease dramatically with increase of the currents. ► Non-linear current–voltage (I–V) characteristics are observed. ► Current can have influence on the low field magnetoresistance of the samples. - Abstract: Polycrystalline samples of cobaltites Nd{sub 1−x}Sr{sub x}CoO{sub 3} (x = 0.1, 0.2, 0.3) with the perovskite structure were synthesized by conventional solid state reaction method. Different currents ranging from 1 μA to 1 mA were applied to study the electroresistance (ER) effect. Temperature dependence of resistivity for the samples decrease dramatically with increase of the currents in the low temperature and non-linear current–voltage (I–V) characteristics are observed. The maximum ER ratio (defined as ER = (ρ{sub 1} {sub mA} − ρ{sub L})/ρ{sub L} × 100%) of the all samples is more than −99%, which indicates a colossal electroresistance (CER) effect has found in these compounds. What is more, we also found that electric current can have influence on the low field magnetoresistance (LFMR) of the samples. LFMR decrease with the increase of applied current. The experimental results were discussed by spin polarized carriers modified ferromagnetic (FM)/nonmagnetic (NM) interface and grain interior phase separation scenario.},
doi = {10.1016/J.MATERRESBULL.2012.11.105},
url = {https://www.osti.gov/biblio/22290381}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 3,
volume = 48,
place = {United States},
year = {Fri Mar 15 00:00:00 EDT 2013},
month = {Fri Mar 15 00:00:00 EDT 2013}
}