Relaxor ferroelectric behavior in Ca-doped TbMnO3

N. Mufti; A.A. Nugroho; G.R. Blake; T.T.M.  Palstra

doi:10.1103/PhysRevB.78.024109

Relaxor ferroelectric behavior in Ca-doped TbMnO3

N. Mufti, A.A. Nugroho, G.R. Blake, T.T.M. Palstra

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Abstract

We have studied the effect of Ca-doping in single-crystal Tb1−xCaxMnO3(x≤0.1) on the crystal and magnetic structure, magnetocapacitance, and electric polarization. For low doping (x=0.05), the presence of Mn4+ ions gives rise to a state with behavior resembling that of a relaxor ferroelectric. The coherence length of the Mn magnetic spin spiral is reduced, while the Mn-modulation wave vector is unchanged. For doping larger than 5%, the ferroelectric state is suppressed, which we ascribe to breakdown of the spiral magnetic structure.

Original language	English
Article number	024109
Number of pages	5
Journal	Physical Review B (Condensed Matter and Materials Physics)
Volume	78
DOIs	https://doi.org/10.1103/PhysRevB.78.024109
Publication status	Published - 11 Jul 2008
Externally published	Yes

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title = "Relaxor ferroelectric behavior in Ca-doped TbMnO3",

abstract = "We have studied the effect of Ca-doping in single-crystal Tb1−xCaxMnO3(x≤0.1) on the crystal and magnetic structure, magnetocapacitance, and electric polarization. For low doping (x=0.05), the presence of Mn4+ ions gives rise to a state with behavior resembling that of a relaxor ferroelectric. The coherence length of the Mn magnetic spin spiral is reduced, while the Mn-modulation wave vector is unchanged. For doping larger than 5%, the ferroelectric state is suppressed, which we ascribe to breakdown of the spiral magnetic structure.",

author = "N. Mufti and A.A. Nugroho and G.R. Blake and T.T.M. Palstra",

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T1 - Relaxor ferroelectric behavior in Ca-doped TbMnO3

AU - Mufti, N.

AU - Nugroho, A.A.

AU - Blake, G.R.

AU - Palstra, T.T.M.

PY - 2008/7/11

Y1 - 2008/7/11

N2 - We have studied the effect of Ca-doping in single-crystal Tb1−xCaxMnO3(x≤0.1) on the crystal and magnetic structure, magnetocapacitance, and electric polarization. For low doping (x=0.05), the presence of Mn4+ ions gives rise to a state with behavior resembling that of a relaxor ferroelectric. The coherence length of the Mn magnetic spin spiral is reduced, while the Mn-modulation wave vector is unchanged. For doping larger than 5%, the ferroelectric state is suppressed, which we ascribe to breakdown of the spiral magnetic structure.

AB - We have studied the effect of Ca-doping in single-crystal Tb1−xCaxMnO3(x≤0.1) on the crystal and magnetic structure, magnetocapacitance, and electric polarization. For low doping (x=0.05), the presence of Mn4+ ions gives rise to a state with behavior resembling that of a relaxor ferroelectric. The coherence length of the Mn magnetic spin spiral is reduced, while the Mn-modulation wave vector is unchanged. For doping larger than 5%, the ferroelectric state is suppressed, which we ascribe to breakdown of the spiral magnetic structure.

U2 - 10.1103/PhysRevB.78.024109

DO - 10.1103/PhysRevB.78.024109

M3 - Article

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VL - 78

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

M1 - 024109

ER -

Relaxor ferroelectric behavior in Ca-doped TbMnO3

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