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• W1964139830 abstract "Ceramic ${text{Bi}}_{1ensuremath{-}x}{text{Nd}}_{x}{text{FeO}}_{3}$ solid solutions in the approximate compositional range $0.15ensuremath{le}xensuremath{le}0.25$ undergo first-order antiferroelectric $(text{AFE})ensuremath{leftrightarrow}text{paraelectric}$ (PE) phase transitions between $300text{ }ifmmode^circelsetextdegreefi{}text{C}$ and room temperature. The orthorhombic AFE ($Pnam$, $ensuremath{surd}2{a}_{text{c}}ifmmodetimeselsetexttimesfi{}2ensuremath{surd}2{a}_{text{c}}ifmmodetimeselsetexttimesfi{}4{a}_{text{c}}$, where ${a}_{text{c}}ensuremath{approx}4text{ }text{AA{}}$ and is the lattice parameter of an ideal cubic perovskite) and PE ($Pbnm$, $ensuremath{surd}2{a}_{text{c}}ifmmodetimeselsetexttimesfi{}ensuremath{surd}2{a}_{text{c}}ifmmodetimeselsetexttimesfi{}2{a}_{text{c}}$) structures differ not only in the type of octahedral tilt system but also in the pattern of $A$-cation (Bi/Nd) displacements. The $text{AFE}ensuremath{leftrightarrow}text{PE}$ transition is accompanied by a large $(ensuremath{approx}2mathrm{%})$ discontinuous volume change similar to that observed at the ferroelectric $(text{FE})ensuremath{leftrightarrow}text{PE}$ transition in ${text{BiFeO}}_{3}$. For all compositions, the structural transition occurs within the $G$-type antiferromagnetic (AFM) state. Variable-temperature magnetic measurements reveal a strong coupling between the $text{AFE}ensuremath{leftrightarrow}text{PE}$ transition and the magnetic ordering. Rietveld refinements using neutron powder-diffraction data demonstrate that the structural transition is accompanied by reorientation of magnetic dipoles within the $G$-type AFM array resulting in a significant increase in magnetization." @default.
• W1964139830 created "2016-06-24" @default.
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• W1964139830 date "2010-01-27" @default.
• W1964139830 modified "2023-09-27" @default.
• W1964139830 title "Reorientation of magnetic dipoles at the antiferroelectric-paraelectric phase transition of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>Bi</mml:mtext></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Nd</mml:mtext></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mrow><mml:mtext>FeO</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow…" @default.
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• W1964139830 doi "https://doi.org/10.1103/physrevb.81.020103" @default.
• W1964139830 hasPublicationYear "2010" @default.
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