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- W2001232150 abstract "We have investigated the effects of the strain induced by ferroelectric poling (or the converse piezoelectric effect) on the transport properties of ${text{LaMnO}}_{3+ensuremath{delta}}$ and ${text{CaMnO}}_{3}$ thin films grown on ferroelectric $0.67text{Pb}({text{Mg}}_{1/3}{text{Nb}}_{2/3}){text{O}}_{3}text{ensuremath{-}}0.33{text{PbTiO}}_{3}$ single-crystal substrates. The ferroelectric poling of the substrate gives rise to a reduction in the in-plane tensile strain of the ${text{LaMnO}}_{3+ensuremath{delta}}$ film, which results in a significant decrease in the resistance and increase in the insulator-to-metal transition temperature ${T}_{P}$ of the film. The ferroelectric poling also leads to opposite effects on the magnetoresistance (MR) below and above ${T}_{P}$, namely, MR is reduced for $T<{T}_{P}$ while MR is enhanced for $T>{T}_{P}$. These strain effects are explained in terms of coexisting phases whose volume fractions are modified as a result of the reduction in the Jahn-Teller (JT) distortion due to ferroelectric poling. An investigation of the effects of the strain induced by the converse piezoelectric effect on the resistance of the ${text{LaMnO}}_{3+ensuremath{delta}}$ and ${text{CaMnO}}_{3}$ films shows that the resistance-strain coefficients $(ensuremath{Delta}R/R)/(ensuremath{Delta}{c}_{film}/{c}_{film})$ of the ${text{LaMnO}}_{3+ensuremath{delta}}$ film is much larger than those of the ${text{CaMnO}}_{3}$ film. This result may imply that the strain-induced modification of the electronic bandwidth alone cannot account for the large $(ensuremath{Delta}R/R)/(ensuremath{Delta}{c}_{film}/{c}_{film})$ observed in the ${text{LaMnO}}_{3+ensuremath{delta}}$ film, and highlights that the strong coupling of charge carriers to JT distortion is crucial for understanding the effects of the substrate-induced strain in manganite thin films." @default.
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- W2001232150 date "2010-03-30" @default.
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- W2001232150 title "Effects of substrate-induced strain on transport properties of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>LaMnO</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>CaMnO</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow…" @default.
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- W2001232150 doi "https://doi.org/10.1103/physrevb.81.104427" @default.
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