Optical bandgap reduction and ferromagnetic enhancement at room-temperature in PbTi1-xFexO3-δ ferroelectrics

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

doi:10.1016/j.matlet.2016.09.022

Optical bandgap reduction and ferromagnetic enhancement at room-temperature in PbTi_1-xFe_xO_3-δ ferroelectrics

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

^*Corresponding author for this work

School of Physics and Electronic Science

East China Normal University
Shanghai University

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

15 Scopus citations

Abstract

The PbTi_1-xFe_xO_3-δ (xPTFO) ferroelectric ceramics have been studied by means of structural characterizations, optical and magnetic measurements. All the samples show a tetragonal perovskite structure with uniform grains. In Fe-doped PbTiO₃, the oxygen-vacancies were confirmed by an X-ray photoelectron spectroscopy, which affect the materials’ optical and magnetic properties. The optical bandgap of xPTFO decreases significantly with increasing Fe content, expressed by (2.78–5.05x) eV. Magnetic measurements show a ferromagnetic-paramagnetic transition occurs in xPTFO ceramics, which can be attributed to the competition between ferromagnetic and paramagnetic/antiferromagnetic components. These findings will open up a route to design optimal perovskite compounds for photovoltaic devices and magnetic storage.

Original language	English
Pages (from-to)	380-383
Number of pages	4
Journal	Materials Letters
Volume	185
DOIs	https://doi.org/10.1016/j.matlet.2016.09.022
State	Published - 15 Dec 2016

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Keywords

Crystal growth
Defects
Ferroelectrics
Modified bandgap and ferromagnetism
PbTiFeO

Access to Document

10.1016/j.matlet.2016.09.022

Cite this

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title = "Optical bandgap reduction and ferromagnetic enhancement at room-temperature in PbTi1-xFexO3-δ ferroelectrics",

abstract = "The PbTi1-xFexO3-δ (xPTFO) ferroelectric ceramics have been studied by means of structural characterizations, optical and magnetic measurements. All the samples show a tetragonal perovskite structure with uniform grains. In Fe-doped PbTiO3, the oxygen-vacancies were confirmed by an X-ray photoelectron spectroscopy, which affect the materials{\textquoteright} optical and magnetic properties. The optical bandgap of xPTFO decreases significantly with increasing Fe content, expressed by (2.78–5.05x) eV. Magnetic measurements show a ferromagnetic-paramagnetic transition occurs in xPTFO ceramics, which can be attributed to the competition between ferromagnetic and paramagnetic/antiferromagnetic components. These findings will open up a route to design optimal perovskite compounds for photovoltaic devices and magnetic storage.",

keywords = "Crystal growth, Defects, Ferroelectrics, Modified bandgap and ferromagnetism, PbTiFeO",

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

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2016.09.022",

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T1 - Optical bandgap reduction and ferromagnetic enhancement at room-temperature in PbTi1-xFexO3-δ ferroelectrics

AU - Zheng, Tuo

AU - Deng, Hongmei

AU - Zhou, Wenliang

AU - Yang, Pingxiong

AU - Chu, Junhao

PY - 2016/12/15

Y1 - 2016/12/15

N2 - The PbTi1-xFexO3-δ (xPTFO) ferroelectric ceramics have been studied by means of structural characterizations, optical and magnetic measurements. All the samples show a tetragonal perovskite structure with uniform grains. In Fe-doped PbTiO3, the oxygen-vacancies were confirmed by an X-ray photoelectron spectroscopy, which affect the materials’ optical and magnetic properties. The optical bandgap of xPTFO decreases significantly with increasing Fe content, expressed by (2.78–5.05x) eV. Magnetic measurements show a ferromagnetic-paramagnetic transition occurs in xPTFO ceramics, which can be attributed to the competition between ferromagnetic and paramagnetic/antiferromagnetic components. These findings will open up a route to design optimal perovskite compounds for photovoltaic devices and magnetic storage.

AB - The PbTi1-xFexO3-δ (xPTFO) ferroelectric ceramics have been studied by means of structural characterizations, optical and magnetic measurements. All the samples show a tetragonal perovskite structure with uniform grains. In Fe-doped PbTiO3, the oxygen-vacancies were confirmed by an X-ray photoelectron spectroscopy, which affect the materials’ optical and magnetic properties. The optical bandgap of xPTFO decreases significantly with increasing Fe content, expressed by (2.78–5.05x) eV. Magnetic measurements show a ferromagnetic-paramagnetic transition occurs in xPTFO ceramics, which can be attributed to the competition between ferromagnetic and paramagnetic/antiferromagnetic components. These findings will open up a route to design optimal perovskite compounds for photovoltaic devices and magnetic storage.

KW - Crystal growth

KW - Defects

KW - Ferroelectrics

KW - Modified bandgap and ferromagnetism

KW - PbTiFeO

UR - https://www.scopus.com/pages/publications/84988027167

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DO - 10.1016/j.matlet.2016.09.022

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