Structural evidence for enhanced polarization in a commensurate short-period BaTiO3/SrTiO3 superlattice

被引：83

作者：

Tian, W. ^{[1
]}

Jiang, J. C.

Pan, X. Q.

Haeni, J. H.

Li, Y. L.

Chen, L. Q.

Schlom, D. G.

Neaton, J. B.

Rabe, K. M.

Jia, Q. X.

机构：

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[3] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[4] Los Alamos Natl Lab, MPA, STC, Los Alamos, NM 87545 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2335367

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A short-period (BaTiO3)(6)/(SrTiO3)(5) superlattice was characterized by x-ray diffraction and transmission electron microscopy. The superlattice is epitaxially oriented with the c axes of BaTiO3 and SrTiO3 normal to the (001) surface of the SrTiO3 substrate. Despite the large in-plane lattice mismatch between BaTiO3 and SrTiO3 (similar to 2.2%), the superlattice interfaces were found to be nearly commensurate. The crystallographic c/a ratio of the superlattice was measured and the results agree quantitatively with first-principles calculations and phase-field modeling. The agreement supports the validity of the enhanced spontaneous polarization predicted for short-period BaTiO3/SrTiO3 superlattices. (c) 2006 American Institute of Physics.

引用

页数：3

共 28 条

[1] Relaxor features in ferroelectric superlattices: A Maxwell-Wagner approach [J].

Catalan, G ;

O'Neill, D ;

Bowman, RM ;

Gregg, JM .

APPLIED PHYSICS LETTERS, 2000, 77 (19) :3078-3080

[2] Ferroelectric and antiferroelectric coupling in superlattices of paraelectric perovskites at room temperature [J].

Christen, HM ;

Specht, ED ;

Silliman, SS ;

Harshavardhan, KS .

PHYSICAL REVIEW B, 2003, 68 (02)

[3] Field-dependent dielectric permittivity of paraelectric superlattice structures [J].

Christen, HM ;

Knauss, LA ;

Harshavardhan, KS .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1998, 56 (2-3) :200-203

[4] Enhancement of dielectric constant and associated coupling of polarization behavior in thin film relaxor superlattices [J].

Corbett, MH ;

Bowman, RM ;

Gregg, JM ;

Foord, DT .

APPLIED PHYSICS LETTERS, 2001, 79 (06) :815-817

[5] Unusual behavior of the ferroelectric polarization in PbTiO3/SrTiO3 superlattices -: art. no. 177601 [J].

Dawber, M ;

Lichtensteiger, C ;

Cantoni, M ;

Veithen, M ;

Ghosez, P ;

Johnston, K ;

Rabe, KM ;

Triscone, JM .

PHYSICAL REVIEW LETTERS, 2005, 95 (17)

[6]

DEVONSHIRE AF, 1954, PHILOS MAG S, V3, P85, DOI DOI 10.1080/00018735400101173

[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] RHEED intensity oscillations for the stoichiometric growth of SrTiO3 thin films by reactive molecular beam epitaxy [J].

Haeni, JH ;

Theis, CD ;

Schlom, DG .

JOURNAL OF ELECTROCERAMICS, 2000, 4 (2-3) :385-391

[9] Abrupt PbTiO3/SrTiO3 superlattices grown by reactive molecular beam epitaxy [J].

Jiang, JC ;

Pan, XQ ;

Tian, W ;

Theis, CD ;

Schlom, DG .

APPLIED PHYSICS LETTERS, 1999, 74 (19) :2851-2853

[10] Strain manipulation in BaTiO3/SrTiO3 artificial lattice toward high dielectric constant and its nonlinearity [J].

Kim, L ;

Jung, DG ;

Kim, J ;

Kim, YS ;

Lee, J .

APPLIED PHYSICS LETTERS, 2003, 82 (13) :2118-2120

← 1 2 3 →