Enhanced electric polarizability at the magnetic ordering temperature of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">La</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span><span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CuO</mi></mrow><mrow><mn>4</mn><mo>+</mo><mi mathvariant="italic">x</mi></mrow></msub></mrow></math></span>

G. Cao; J. W. O’Reilly; J. E. Crow; L. R. Testardi

doi:10.1103/PhysRevB.47.11510

Enhanced electric polarizability at the magnetic ordering temperature of ${La}_{2}$ ${CuO}_{4 + x}$

G. Cao, J. W. O’Reilly, J. E. Crow, and L. R. Testardi

Phys. Rev. B 47, 11510 – Published 1 May 1993

Abstract

The low-frequency c-axis dielectric constant of ${La}_{2}$ ${CuO}_{4 + x}$ exhibits values ∼1500 for T≤350 K with an added ∼2000 enhancement in the vicinity of the magnetic ordering temperature. The possibility of a simultaneous (anti)ferroelectric-antiferromagnetic transition at 270 K is suggested, but experimental confirmation of the ferroelectric state is precluded by the high and field-dependent electrical conductivity.

Received 14 December 1992

DOI:https://doi.org/10.1103/PhysRevB.47.11510

Authors & Affiliations

G. Cao, J. W. O’Reilly, J. E. Crow, and L. R. Testardi

Center for Material Research and Technology and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306

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Vol. 47, Iss. 17 — 1 May 1993

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Physical Review B

covering condensed matter and materials physics