Effect of oxygen content on dielectric characteristics of Cr-doped LaTiOx

Ming Ma; Yan Chen; Yi Min Cui

doi:10.1088/1674-1056/27/5/057702

Effect of oxygen content on dielectric characteristics of Cr-doped LaTiO_x

Ming Ma
, Yan Chen^*
, Yi Min Cui

^*Corresponding author for this work

School of Physics

Beihang University

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

2 Scopus citations

Abstract

The ceramics La_0.85Cr_0.15TiO_x and La_0.7Cr_0.3TiO_x are prepared by conventional solid-state reaction method. The dielectric properties of Cr-doped LaTiO_x as a function of frequency (0.1 kHz ≤ f ≤ 1 MHz) and temperature (77 K ≤ T ≤ 360 K) are studied. The blocks are then annealed in a flowing O₂ or Ar/H₂ to convert their oxygen content and the tests mentioned above are performed. The highly oxygenated samples exhibit extremely high low-frequency dielectric constants at room temperature (∼10₆). The results show that the oxygen stoichiometry could significantly influence the dielectric properties of Cr-doped LaTiO_x.

Original language	English
Article number	057702
Journal	Chinese Physics B
Volume	27
Issue number	5
DOIs	https://doi.org/10.1088/1674-1056/27/5/057702
State	Published - May 2018

Keywords

Dielectric characteristics
LaTiO
Oxygen content

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10.1088/1674-1056/27/5/057702

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title = "Effect of oxygen content on dielectric characteristics of Cr-doped LaTiOx",

abstract = "The ceramics La0.85Cr0.15TiOx and La0.7Cr0.3TiOx are prepared by conventional solid-state reaction method. The dielectric properties of Cr-doped LaTiOx as a function of frequency (0.1 kHz ≤ f ≤ 1 MHz) and temperature (77 K ≤ T ≤ 360 K) are studied. The blocks are then annealed in a flowing O2 or Ar/H2 to convert their oxygen content and the tests mentioned above are performed. The highly oxygenated samples exhibit extremely high low-frequency dielectric constants at room temperature (∼106). The results show that the oxygen stoichiometry could significantly influence the dielectric properties of Cr-doped LaTiOx.",

keywords = "Dielectric characteristics, LaTiO, Oxygen content",

author = "Ming Ma and Yan Chen and Cui, \{Yi Min\}",

note = "Publisher Copyright: {\textcopyright} 2018 Chinese Physical Society and IOP Publishing Ltd.",

year = "2018",

month = may,

doi = "10.1088/1674-1056/27/5/057702",

language = "英语",

volume = "27",

journal = "Chinese Physics B",

issn = "1674-1056",

publisher = "Institute of Physics",

number = "5",

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TY - JOUR

T1 - Effect of oxygen content on dielectric characteristics of Cr-doped LaTiOx

AU - Ma, Ming

AU - Chen, Yan

AU - Cui, Yi Min

PY - 2018/5

Y1 - 2018/5

N2 - The ceramics La0.85Cr0.15TiOx and La0.7Cr0.3TiOx are prepared by conventional solid-state reaction method. The dielectric properties of Cr-doped LaTiOx as a function of frequency (0.1 kHz ≤ f ≤ 1 MHz) and temperature (77 K ≤ T ≤ 360 K) are studied. The blocks are then annealed in a flowing O2 or Ar/H2 to convert their oxygen content and the tests mentioned above are performed. The highly oxygenated samples exhibit extremely high low-frequency dielectric constants at room temperature (∼106). The results show that the oxygen stoichiometry could significantly influence the dielectric properties of Cr-doped LaTiOx.

AB - The ceramics La0.85Cr0.15TiOx and La0.7Cr0.3TiOx are prepared by conventional solid-state reaction method. The dielectric properties of Cr-doped LaTiOx as a function of frequency (0.1 kHz ≤ f ≤ 1 MHz) and temperature (77 K ≤ T ≤ 360 K) are studied. The blocks are then annealed in a flowing O2 or Ar/H2 to convert their oxygen content and the tests mentioned above are performed. The highly oxygenated samples exhibit extremely high low-frequency dielectric constants at room temperature (∼106). The results show that the oxygen stoichiometry could significantly influence the dielectric properties of Cr-doped LaTiOx.

KW - Dielectric characteristics

KW - LaTiO

KW - Oxygen content

UR - https://www.scopus.com/pages/publications/85047969718

U2 - 10.1088/1674-1056/27/5/057702

DO - 10.1088/1674-1056/27/5/057702

M3 - 文章

AN - SCOPUS:85047969718

SN - 1674-1056

VL - 27

JO - Chinese Physics B

JF - Chinese Physics B

IS - 5

M1 - 057702

ER -

Effect of oxygen content on dielectric characteristics of Cr-doped LaTiO_x

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Keywords

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