Pb-free semiconductor ferroelectrics: An experimental study of Ba(Ti0.75Ce0.125Pd0.125)O3-δ thin films

Wenliang Zhou; Hongmei Deng; Tuo Zheng; Pingxiong Yang; Junhao Chu

doi:10.1016/j.matlet.2016.04.167

Pb-free semiconductor ferroelectrics: An experimental study of Ba(Ti_0.75Ce_0.125Pd_0.125)O_3-δ thin films

Wenliang Zhou
, Hongmei Deng
, Tuo Zheng
, Pingxiong Yang^*
, Junhao Chu

^*Corresponding author for this work

School of Physics and Electronic Science

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

4 Scopus citations

Abstract

Thin films of perovskite-type Ba(Ti_0.75Ce_0.125Pd_0.125)O_3-δ (BTCPO) have been investigated by means of microstructural characterizations, optical and magnetic measurements. X-ray diffraction patterns show that the BTCPO exhibits a centrosymmetric cubic perovskite structure accompanied by the grain refinement. Raman spectroscopy, however, shows the symmetry of crystalline structures is locally lowered by the presence of dopants, significantly deviating from the ideal Pm3m space group, possibly due to an increased internal strain. The BTCPO film possesses a narrow bandgap of 2.21 eV, much smaller than BaTiO₃ (3.5 eV), which originates from new states in the electronic structure with the presence of Pd²⁺. Magnetic hysteresis loops indicate that the BTCPO film exhibits an excellent combination of saturation magnetization and coercivity at room temperature.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Materials Letters
Volume	177
DOIs	https://doi.org/10.1016/j.matlet.2016.04.167
State	Published - 15 Aug 2016

Keywords

Ba(TiCePd)O
Ferroelectrics
Optical and magnetic properties
Sol-gel preparation
Thin films

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10.1016/j.matlet.2016.04.167

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title = "Pb-free semiconductor ferroelectrics: An experimental study of Ba(Ti0.75Ce0.125Pd0.125)O3-δ thin films",

abstract = "Thin films of perovskite-type Ba(Ti0.75Ce0.125Pd0.125)O3-δ (BTCPO) have been investigated by means of microstructural characterizations, optical and magnetic measurements. X-ray diffraction patterns show that the BTCPO exhibits a centrosymmetric cubic perovskite structure accompanied by the grain refinement. Raman spectroscopy, however, shows the symmetry of crystalline structures is locally lowered by the presence of dopants, significantly deviating from the ideal Pm3m space group, possibly due to an increased internal strain. The BTCPO film possesses a narrow bandgap of 2.21 eV, much smaller than BaTiO3 (3.5 eV), which originates from new states in the electronic structure with the presence of Pd2+. Magnetic hysteresis loops indicate that the BTCPO film exhibits an excellent combination of saturation magnetization and coercivity at room temperature.",

keywords = "Ba(TiCePd)O, Ferroelectrics, Optical and magnetic properties, Sol-gel preparation, Thin films",

author = "Wenliang Zhou and Hongmei Deng and Tuo Zheng and Pingxiong Yang and Junhao Chu",

year = "2016",

month = aug,

day = "15",

doi = "10.1016/j.matlet.2016.04.167",

language = "英语",

volume = "177",

pages = "1--4",

journal = "Materials Letters",

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T1 - Pb-free semiconductor ferroelectrics

T2 - An experimental study of Ba(Ti0.75Ce0.125Pd0.125)O3-δ thin films

AU - Zhou, Wenliang

AU - Deng, Hongmei

AU - Zheng, Tuo

AU - Yang, Pingxiong

AU - Chu, Junhao

PY - 2016/8/15

Y1 - 2016/8/15

N2 - Thin films of perovskite-type Ba(Ti0.75Ce0.125Pd0.125)O3-δ (BTCPO) have been investigated by means of microstructural characterizations, optical and magnetic measurements. X-ray diffraction patterns show that the BTCPO exhibits a centrosymmetric cubic perovskite structure accompanied by the grain refinement. Raman spectroscopy, however, shows the symmetry of crystalline structures is locally lowered by the presence of dopants, significantly deviating from the ideal Pm3m space group, possibly due to an increased internal strain. The BTCPO film possesses a narrow bandgap of 2.21 eV, much smaller than BaTiO3 (3.5 eV), which originates from new states in the electronic structure with the presence of Pd2+. Magnetic hysteresis loops indicate that the BTCPO film exhibits an excellent combination of saturation magnetization and coercivity at room temperature.

AB - Thin films of perovskite-type Ba(Ti0.75Ce0.125Pd0.125)O3-δ (BTCPO) have been investigated by means of microstructural characterizations, optical and magnetic measurements. X-ray diffraction patterns show that the BTCPO exhibits a centrosymmetric cubic perovskite structure accompanied by the grain refinement. Raman spectroscopy, however, shows the symmetry of crystalline structures is locally lowered by the presence of dopants, significantly deviating from the ideal Pm3m space group, possibly due to an increased internal strain. The BTCPO film possesses a narrow bandgap of 2.21 eV, much smaller than BaTiO3 (3.5 eV), which originates from new states in the electronic structure with the presence of Pd2+. Magnetic hysteresis loops indicate that the BTCPO film exhibits an excellent combination of saturation magnetization and coercivity at room temperature.

KW - Ba(TiCePd)O

KW - Ferroelectrics

KW - Optical and magnetic properties

KW - Sol-gel preparation

KW - Thin films

UR - https://www.scopus.com/pages/publications/84964898725

U2 - 10.1016/j.matlet.2016.04.167

DO - 10.1016/j.matlet.2016.04.167

M3 - 文章

AN - SCOPUS:84964898725

SN - 0167-577X

VL - 177

SP - 1

EP - 4

JO - Materials Letters

JF - Materials Letters

ER -

Pb-free semiconductor ferroelectrics: An experimental study of Ba(Ti_0.75Ce_0.125Pd_0.125)O_3-δ thin films

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Keywords

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