Relaxor ferroelectric behavior in Ca-doped TbMnO3

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

Research output: Contribution to journalArticleAcademicpeer-review

26 Citations (Scopus)

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 languageEnglish
Article number024109
Number of pages5
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume78
DOIs
Publication statusPublished - 11 Jul 2008
Externally publishedYes

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