Multiferroicity with coexisting isotropic and anisotropic spins in Ca 3 Co2-x Mn x O6

Jae Wook Kim, Y. Kamiya, Eun Deok Mun, M. Jaime, N. Harrison, J. D. Thompson, V. Kiryukhin, H. T. Yi, Y. S. Oh, S. W. Cheong, C. D. Batista, V. S. Zapf

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18 Scopus citations


We study magnetic and multiferroic behavior in Ca3Co2-xMnxO6 (x∼ 0.97) by high-field measurements of magnetization (M), magnetostriction [L(H)/L], electric polarization (P), and magnetocaloric effect. This study also gives insight into the zero- and low-magnetic-field magnetic structure and magnetoelectric coupling mechanisms. We measured M and ΔL/L up to pulsed magnetic fields of 92 T, and determined the saturation moment and field. On the controversial topic of the spin states of Co2+ and Mn4+ ions, we find evidence for S=32 spins for both ions with no magnetic-field-induced spin-state crossovers. Our data also indicate that Mn4+ spins are quasi-isotropic and develop components in the ab plane in applied magnetic fields of 10 T. These spins cant until saturation at 85 T, whereas the Ising Co2+ spins saturate by 25 T. Furthermore, our results imply that the mechanism for suppression of electric polarization with magnetic fields near 10 T is flopping of the Mn4+ spins into the ab plane, indicating that appropriate models must include the coexistence of Ising and quasi-isotropic spins.

Original languageEnglish (US)
Article number060404
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - Feb 13 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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