TheinteractionofmultifoldpolarorderingsinBa-dopedSr"0"."7Ca"0"."3TiO"3资源-CSDN文库

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Author's personal copy

The

interaction

multifold

polar

orderings

Ba-doped

0.7

0.3

TiO

Wei

Q.J.

Zhou

Q.G.

Song

Z.P.

S.Q.

Guo

Y.R.

Guo

Y.F.

Chen

X.L.

J.-M.

Liu

College

Science

and

Institute

Low

Dimensional

Materials

and

Technology,

Civil

Aviation

University

China,

Tianjin

300300,

China

Laboratory

Solid

State

Microstructures,

Nanjing

University,

Nanjing

210093,

China

Introduction

SrTiO

(STO)

peculiar

and

interesting

incipient

ferroelectric

(IFE)

[1–3]

and

displays

number

attractive

new

phenomena

due

the

existence

quantum

critical

phenomenon

[4,5].

exhibits

quantum

paraelectricity

(QPE)

when

the

lattice

soft

mode

IFE

suppressed

quantum

mechanical

effects

temperature

This

special

case

quantum

saturation

order

parameter

where,

upon

cooling,

the

order

parameter

fails

become

non-zero

due

quantum

ﬂuctuations

(QFs)

[6–8].

However,

referring

the

high

polarizability

the

lattice,

STO

very

sensitive

dipole

impurities

which

can

induce

various

types

polar

phases,

for

example,

dipole

glass,

ferroglass,

ferroelectric

(FE),

and

anti-ferroelectric

(AFE),

etc.

[9–13].

Now,

mixed

1y

TiO

(SCTy)

attractive

researchers

because

its

rich

physics

relative

the

end

members

[14–17].

For

example,

small

ion

-doping

the

site

can

transform

STO

into

XY-type

state,

ferrielectric

(FIE)

phase,

relaxor

dipole

glass

phase,

and

AFE

state,

etc.

[1,14,18].

believed

that

the

dipole

moment

the

off-center

small

ions

(e.g.,

ions

SCT)

and

the

corresponding

reorientation

dynamic

are

considered

have

drastic

inﬂuence

upon

the

physical

properties

SCTy

system

[1,9,10].

For

SCTy,

the

novel

AFE

transition

driven

the

and

point

instabilities

the

paraelectric

(PE)

phase

was

not

addressed

until

recent

work

for

SCTy

0.12



0.40

[14,19].

However,

our

best

knowledge,

the

instability

AFE

phase,

particularly

the

competition

AFE

ordering

with

other

polar

orderings,

was

not

received

much

attention.

Here,

great

interest

research

the

possible

competition

coupling

interactions

between

different

polar

orderings

(if

any

exist)

which

may

allow

additional

phenomena

and

physics

discovered

yet.

realize

the

above

motivation,

sober

approach

the

incorporation

other

dipole

impurity

current

SCTy

system.

this

case,

the

quadrupole

ordering

induced

STO

matrix

[12]

can

explored

appropriate

dipole

impurity

modify

the

AFE

phase

research

the

possible

competition

coupling

interactions

these

polar

orderings

with

different

intrinsic

polar

properties

[1,12].

Therefore,

the

major

issue

worth

addressing

the

interaction

between

different

polar

orderings

and

the

instability

the

AFE

state

against

-doping

the

AFE

SCTy

system.

this

paper,

will

pay

our

attention

the

low-T

property

0.7x

0.3

TiO

with

relatively

stable

AFE

state

when

0.0,

and

particular

the

inﬂuence

-doping

-site

the

crystalline

structure,

AFE

behavior,

dielectric

properties,

and

phase

transitions

properties,

referring

the

different

polar

orderings

and

their

possible

peculiar

competition

and

coupling

interactions.

Materials

Research

Bulletin

(2012)

1316–1322

Article

history:

Received

November

2011

Received

revised

form

February

2012

Accepted

March

2012

Available

online

March

2012

PACS:

77.22.d

77.

80.Bh

77.84.s

Keywords:

Ceramics

X-ray

diffraction

Dielectric

properties

Ferroelectricity

series

polycrystalline

0.7x

0.3

TiO

(SCBT)

(0.0



0.25)

samples

were

synthesized

through

solid-state

reaction

method,

and

their

microstructural,

anti-ferroelectric

(AFE),

ferroelectric

(FE),

dielectric,

and

phase

transition

properties

were

investigated.

With

the

incorporation

site,

the

AFE

polar

phase

0.0)

has

been

sharply

changed,

experiencing

AFE

state,

enhanced

state,

cooperative

state,

and

normal

state,

owing

the

competition

and

coupling

interactions

different

polar

orderings

SCBT

system.

Note

that

excellent

behavior

has

been

found

the

cooperative

state.

addition,

the

critical

region

has

been

proposed

the



phase

diagram.

2012

Elsevier

Ltd.

All

rights

reserved.

Corresponding

author.

Tel.:

+86

151

22848807;

fax:

+86

025

83595535.

E-mail

addresses:liujm@nju.edu.cn

(J.-M.

Liu),

weitong.nju@gmail.com

(T.

Wei).

Contents

lists

available

SciVerse

ScienceDirect

Materials

Research

Bulletin

age:

w.els

evier.c

m/lo

ate/mat

res

0025-5408/$

–

see

front

matter

2012

Elsevier

Ltd.

All

rights

reserved.

doi:10.1016/j.materresbull.2012.03.013

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