Designing polar and magnetic oxides: Zn2FeTaO6 - In search of multiferroics

Man Rong Li, Peter W. Stephens, Maria Retuerto, Tapati Sarkar, Christoph P. Grams, Joachim Hemberger, Mark C. Croft, David Walker, Martha Greenblatt

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Polar oxides are technically of great interest but difficult to prepare. Our recent discoveries predicted that polar oxides can be synthesized in the corundum-derivative A2BB′O6 family with unusually small cations at the A-site and a d0 electron configuration ion at B′-site. When magnetic transition-metal ions are incorporated more interesting polar magnetic oxides can form. In this work we experimentally verified this prediction and prepared LiNbO3 (LN)-type polar magnetic Zn2FeTaO6 via high pressure and temperature synthesis. The crystal structure analysis indicates highly distorted ZnO6 and (Fe/Ta)O6 octahedra, and an estimated spontaneous polarization (PS) of ∼50 μC/cm2 along the c-axis was obtained from point charge model calculations. Zn2Fe3+Ta 5+O6 has a lower magnetic transition temperature (T N ∼ 22 K) than the Mn2FeTaO6 analogue but is less conductive. The dielectric and polarization measurements indicate a potentially switchable component.

Original languageEnglish (US)
Pages (from-to)8508-8511
Number of pages4
JournalJournal of the American Chemical Society
Volume136
Issue number24
DOIs
StatePublished - Jun 18 2014

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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