A novel stimulation: Tailoring conductivity transition in Gd1-xCaxBaCo2O5+δ (x=0-0.4) by microwave stimulation

Yi Lu; Le Chen; Ling Wei; Rong Zhang; Zhenggang Fang; Chunhua Lu; Yaru Ni; Zhongzi Xu; Shunyan Tao

doi:10.1016/j.matlet.2015.06.069

A novel stimulation: Tailoring conductivity transition in Gd_1-xCa_xBaCo₂O_5+δ (x=0-0.4) by microwave stimulation

Yi Lu, Le Chen, Ling Wei, Rong Zhang, Zhenggang Fang, Chunhua Lu, Yaru Ni, Zhongzi Xu, Shunyan Tao

College of Materials Science and Engineering

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

2 Scopus citations

Abstract

Control of the insulator-metal transition (IMT) is a constant focus of intensive study, owing to its importance to the exploration of novel effects and in Information Technology. Complex oxides with competitive mechanisms are suitable objects of study in this regard, because of their susceptibility to external stimuli. The double-perovskite cobaltate Gd_1-xCa_xBaCo₂O_5+δ (GCBC) is one such oxide. In this paper, the combined effects of the GCBC structure and Ca²⁺ doping have been studied for 0≤x≤0.4, which offers the possibility of systemic modulation of the conductivity (σ) of the GCBC via microwave stimulation. The maximum value and rate of increase of σ increase with the microwave power, and it has been found that the conductivity of Gd_0.8Ca_0.2BaCo₂O_5+δ can increase from 158 to 1488 S/cm at a frequency of 2.45 GHz (1500 W) over 2 min. Thus, our experimental study confirms that microwaves are crucial for controlling the electrical properties of cobaltates.

Original language	English
Pages (from-to)	28-31
Number of pages	4
Journal	Materials Letters
Volume	159
DOIs	https://doi.org/10.1016/j.matlet.2015.06.069
State	Published - 29 Jun 2015

Keywords

Electrical conductivity
GdBaCoO
Microwave absorbing

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10.1016/j.matlet.2015.06.069

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title = "A novel stimulation: Tailoring conductivity transition in Gd1-xCaxBaCo2O5+δ (x=0-0.4) by microwave stimulation",

abstract = "Control of the insulator-metal transition (IMT) is a constant focus of intensive study, owing to its importance to the exploration of novel effects and in Information Technology. Complex oxides with competitive mechanisms are suitable objects of study in this regard, because of their susceptibility to external stimuli. The double-perovskite cobaltate Gd1-xCaxBaCo2O5+δ (GCBC) is one such oxide. In this paper, the combined effects of the GCBC structure and Ca2+ doping have been studied for 0≤x≤0.4, which offers the possibility of systemic modulation of the conductivity (σ) of the GCBC via microwave stimulation. The maximum value and rate of increase of σ increase with the microwave power, and it has been found that the conductivity of Gd0.8Ca0.2BaCo2O5+δ can increase from 158 to 1488 S/cm at a frequency of 2.45 GHz (1500 W) over 2 min. Thus, our experimental study confirms that microwaves are crucial for controlling the electrical properties of cobaltates.",

keywords = "Electrical conductivity, GdBaCoO, Microwave absorbing",

author = "Yi Lu and Le Chen and Ling Wei and Rong Zhang and Zhenggang Fang and Chunhua Lu and Yaru Ni and Zhongzi Xu and Shunyan Tao",

year = "2015",

month = jun,

day = "29",

doi = "10.1016/j.matlet.2015.06.069",

language = "英语",

volume = "159",

pages = "28--31",

journal = "Materials Letters",

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TY - JOUR

T1 - A novel stimulation

T2 - Tailoring conductivity transition in Gd1-xCaxBaCo2O5+δ (x=0-0.4) by microwave stimulation

AU - Lu, Yi

AU - Chen, Le

AU - Wei, Ling

AU - Zhang, Rong

AU - Fang, Zhenggang

AU - Lu, Chunhua

AU - Ni, Yaru

AU - Xu, Zhongzi

AU - Tao, Shunyan

PY - 2015/6/29

Y1 - 2015/6/29

N2 - Control of the insulator-metal transition (IMT) is a constant focus of intensive study, owing to its importance to the exploration of novel effects and in Information Technology. Complex oxides with competitive mechanisms are suitable objects of study in this regard, because of their susceptibility to external stimuli. The double-perovskite cobaltate Gd1-xCaxBaCo2O5+δ (GCBC) is one such oxide. In this paper, the combined effects of the GCBC structure and Ca2+ doping have been studied for 0≤x≤0.4, which offers the possibility of systemic modulation of the conductivity (σ) of the GCBC via microwave stimulation. The maximum value and rate of increase of σ increase with the microwave power, and it has been found that the conductivity of Gd0.8Ca0.2BaCo2O5+δ can increase from 158 to 1488 S/cm at a frequency of 2.45 GHz (1500 W) over 2 min. Thus, our experimental study confirms that microwaves are crucial for controlling the electrical properties of cobaltates.

AB - Control of the insulator-metal transition (IMT) is a constant focus of intensive study, owing to its importance to the exploration of novel effects and in Information Technology. Complex oxides with competitive mechanisms are suitable objects of study in this regard, because of their susceptibility to external stimuli. The double-perovskite cobaltate Gd1-xCaxBaCo2O5+δ (GCBC) is one such oxide. In this paper, the combined effects of the GCBC structure and Ca2+ doping have been studied for 0≤x≤0.4, which offers the possibility of systemic modulation of the conductivity (σ) of the GCBC via microwave stimulation. The maximum value and rate of increase of σ increase with the microwave power, and it has been found that the conductivity of Gd0.8Ca0.2BaCo2O5+δ can increase from 158 to 1488 S/cm at a frequency of 2.45 GHz (1500 W) over 2 min. Thus, our experimental study confirms that microwaves are crucial for controlling the electrical properties of cobaltates.

KW - Electrical conductivity

KW - GdBaCoO

KW - Microwave absorbing

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U2 - 10.1016/j.matlet.2015.06.069

DO - 10.1016/j.matlet.2015.06.069

M3 - 文章

AN - SCOPUS:84933511118

SN - 0167-577X

VL - 159

SP - 28

EP - 31

JO - Materials Letters

JF - Materials Letters

ER -

A novel stimulation: Tailoring conductivity transition in Gd_1-xCa_xBaCo₂O_5+δ (x=0-0.4) by microwave stimulation

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Keywords

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