Soft mode behavior in strained SrTiO3 thin film

被引：0

作者：

Hua, Wu ^{[1
]}

Zhan Yage ^{[1
]}

Rong, Zhang ^{[2
]}

机构：

[1] Donghua Univ, Dept Appl Phys, Shanghai, Peoples R China

[2] Shanghai Maritime Univ, Dept Phys, Shanghai, Peoples R China

来源：

2011 INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS (ISAF/PFM) AND 2011 INTERNATIONAL SYMPOSIUM ON PIEZORESPONSE FORCE MICROSCOPY AND NANOSCALE PHENOMENA IN POLAR MATERIALS | 2011年

基金：

中国国家自然科学基金;

关键词：

soft mode; misfit strain; quantum fluctuation; PHASE-DIAGRAMS; FERROELECTRICITY;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We investigate the soft mode properties in strained SrTiO3 thin films by employing the transverse-fieldIsing model, combining with the thermodynamic analysis to modify the strain dependent parameters. It is found that SrTiO3 thin film shows the behavior of the quantum paraelectrics under the tensile strain smaller than the critical misfit strain epsilon(SC)(T=0K) = 0.038%. Under a strain slightly higher than eSC, the SrTiO3 thin film shows the behavior of quantum ferroelectrics. Further increase of the tensile strain results in the greatly enhanced ferroelectricity in SrTiO3 thin film.

引用

页数：4

共 23 条

[1] Phase diagrams and dielectric response of epitaxial barium strontium titanate films: A theoretical analysis [J].

Ban, ZG ;

Alpay, SP .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (11) :9288-9296

[2] DIELECTRIC CONSTANT IN PEROVSKITE TYPE CRYSTALS [J].

BARRETT, JH .

PHYSICAL REVIEW, 1952, 86 (01) :118-120

[3] Relaxor ferroelectricity in strained epitaxial SrTiO3 thin films on DyScO3 substrates [J].

Biegalski, M. D. ;

Jia, Y. ;

Schlom, D. G. ;

Trolier-McKinstry, S. ;

Streiffer, S. K. ;

Sherman, V. ;

Uecker, R. ;

Reiche, P. .

APPLIED PHYSICS LETTERS, 2006, 88 (19)

[4] In-plane anisotropy in the microwave dielectric properties of SrTiO3 films -: art. no. 024107 [J].

Chang, WT ;

Kirchoefer, SW ;

Bellotti, JA ;

Qadri, SB ;

Pond, JM ;

Haeni, JH ;

Schlom, DG .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (02)

[5] CRYSTAL STABILITY AND THE THEORY OF FERROELECTRICITY [J].

COCHRAN, W .

ADVANCES IN PHYSICS, 1960, 9 (36) :387-423

[6]

Devonshire A. F., PHIL MAG S, V3, p[851, 954]

[7] Room-temperature ferroelectricity in strained SrTiO3 [J].

Haeni, JH ;

Irvin, P ;

Chang, W ;

Uecker, R ;

Reiche, P ;

Li, YL ;

Choudhury, S ;

Tian, W ;

Hawley, ME ;

Craigo, B ;

Tagantsev, AK ;

Pan, XQ ;

Streiffer, SK ;

Chen, LQ ;

Kirchoefer, SW ;

Levy, J ;

Schlom, DG .

NATURE, 2004, 430 (7001) :758-761

[8] Quantum paraelectric and induced ferroelectric states in SrTiO3 [J].

Hemberger, J ;

Nicklas, M ;

Viana, R ;

Lunkenheimer, P ;

Loidl, A ;

Bohmer, R .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (25) :4673-4690

[9] SURFACE EFFECTS ON PHASE-TRANSITIONS IN FERROELECTRICS AND DIPOLAR MAGNETS [J].

KRETSCHMER, R ;

BINDER, K .

PHYSICAL REVIEW B, 1979, 20 (03) :1065-1076

[10] Perovskite CaTiO3 as an incipient ferroelectric [J].

Lemanov, VV ;

Sotnikov, AV ;

Smirnova, EP ;

Weihnacht, M ;

Kunze, R .

SOLID STATE COMMUNICATIONS, 1999, 110 (11) :611-614

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