Thermal stability of giant thermoelectric seebeck coefficient for SrTiO3/SrTi0.8Nb0.2O3 superlattices at 900 K

被引：30

作者：

Lee, Kyu Hyoung ^{[1
]}

Mune, Yoriko ^{[2
]}

Ohta, Hiromichi ^{[1
,2
]}

Koumoto, Kunihito ^{[1
,2
]}

机构：

[1] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[2] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

来源：

APPLIED PHYSICS EXPRESS | 2008年 / 1卷 / 01期

关键词：

Seebeck coefficient;

D O I：

10.1143/APEX.1.015007

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Herein we report the carrier transport properties of [(SrTi0O(3))(x)/(SrTi0.8Nb0.2O3)(1)](20) (x = 0-50) superlattices at high temperatures (T = 300-900K). Significant structural changes were not observed in the superlattices after annealing at 900K in a vacuum. The Seebeck coefficient of the [(SrTiO3)(20)/(SrTi0.8Nb0.2O3)(1)](20) superlattice, which was 300 mu V.K-1 at room temperature, gradually increased with temperature and reached 450 mu V.K-1 at 900 K, which is similar to 3 times larger than that of bulk SrTi0.8Nb0.2O3. These observations provide clear evidence that the superlattice is stable and exhibits a giant Seebeck coefficient even at high temperature. (C) 2008 The Japan Society of Applied Physics.

引用

页数：3

共 6 条

[1]

MEYERS MA, 1985, FRONTIERS MAT TECHNO, P478

[2] Enhanced Seebeck coefficient of quantum-confined electrons in SrTiO3/SrTi0.8Nb0.2O3 superlattices [J].

Mune, Yoriko ;

Ohta, Hiromichi ;

Koumoto, Kunihito ;

Mizoguchi, Teruyasu ;

Ikuhara, Yuichi .

APPLIED PHYSICS LETTERS, 2007, 91 (19)

[3] A-site layer terminated perovskite substrate:: NdGaO3 [J].

Ohnishi, T ;

Takahashi, K ;

Nakamura, M ;

Kawasaki, M ;

Yoshimoto, M ;

Koinuma, H .

APPLIED PHYSICS LETTERS, 1999, 74 (17) :2531-2533

[4] Giant thermoelectric Seebeck coefficient of two-dimensional electron gas in SrTiO3 [J].

Ohta, Hiromichi ;

Kim, Sungwng ;

Mune, Yorika ;

Mizoguchi, Teruyasu ;

Nomura, Kenji ;

Ohta, Shingo ;

Nomura, Takashi ;

Nakanishi, Yuki ;

Ikuhara, Yuichi ;

Hirano, Masahiro ;

Hosono, Hideo ;

Koumoto, Kunihito .

NATURE MATERIALS, 2007, 6 (02) :129-134

[5] Large thermoelectric performance of heavily Nb-doped SrTiO3 epitaxial film at high temperature -: art. no. 092108 [J].

Ohta, S ;

Nomura, T ;

Ohta, H ;

Hirano, M ;

Hosono, H ;

Koumoto, K .

APPLIED PHYSICS LETTERS, 2005, 87 (09)

[6]

Wood J, 2007, MATER TODAY, V10, P15, DOI 10.1016/S1369-7021(07)70011-1

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