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Applied Physics Letters / Volume 96 / Issue 14 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 96, 141904 (2010); http://dx.doi.org/10.1063/1.3384996 (3 pages)

Anelastic anomalies and negative Poisson’s ratio in tetragonal BaTiO3 ceramics

Liang Dong1, Donald S. Stone1, and Roderic S. Lakes2

1Materials Science Program, University of Wisconsin, Madison, Wisconsin 53706-1687, USA
2Department of Engineering Physics, Engineering Mechanics Program, Materials Science Program, University of Wisconsin, Madison, Wisconsin 53706-1687, USA

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(Received 13 February 2010; accepted 18 March 2010; published online 6 April 2010)

Anelastic anomalies (sharp variations in modulus and damping with temperature) were observed in tetragonal BaTiO3 via broadband viscoelastic spectroscopy after aging at 50 °C for 15 h. The effect was most pronounced under electrical short circuit condition, at low frequency and under small excitation strain (10−6). Softening in bulk modulus and negative Poisson’s ratio were observed near 60 °C. Effects are attributed to an oxygen vacancy mechanism. A relaxational model cannot account for sharp response at smaller strains. Heterogeneity of negative stiffness is considered as a cause.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

ageing, anelastic relaxation, barium compounds, ceramics, damping, elastic constants, internal stresses, Poisson ratio, softening, vacancies (crystal), viscoelasticity

PACS

  • 81.40.Jj

    Elasticity and anelasticity, stress-strain relations

  • 62.40.+i

    Anelasticity, internal friction, stress relaxation, and mechanical resonances

  • 61.72.jd

    Vacancies

  • 62.20.dj

    Poisson's ratio

  • 81.05.Je

    Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3384996

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    R. S. Lakes, Phys. Rev. Lett. 86, 2897 (2001).

    W. J. Merz, Phys. Rev.78, 52 (1950).

    T. Lee, R. S. Lakes, and A. Lal, Rev. Sci. Instrum. 71, 2855 (2000)RSINAK000071000007002855000001.

    R. Loetzsch, A. Lubcke, I. Uschmann, E. Forster, V. Große, M. Thuerk, T. Koettig, F. Schmidl, and P. Seidel, Appl. Phys. Lett. 96, 071901 (2010)APPLAB000096000007071901000001.

    L. Chen, X. M. Xiong, H. Meng, P. Lv, and J. X. Zhang, Appl. Phys. Lett. 89, 071916 (2006)APPLAB000089000007071916000001.

    L. Dong, D. S. Stone, and R. S. Lakes, J. Appl. Phys. 107, 023514 (2010)JAPIAU000107000002023514000001.

    W. J. Merz, Phys. Rev. 91, 513 (1953).

    L. X. He and D. Vanderbilt, Phys. Rev. B 68, 134103 (2003).

    K. Yoshimoto, T. S. Jain, K. V. Workum, P. F. Nealey, and J. J. de Pablo, Phys. Rev. Lett. 93, 175501 (2004).


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