Spin correlated dielectric memory and rejuvenation in relaxor ferroelectric CuCrS2

A. Karmakar; K. Dey; S. Chatterjee; S. Majumdar; S. Giri

doi:10.1063/1.4863937

Spin correlated dielectric memory and rejuvenation in relaxor ferroelectric CuCrS2

Materials Science 2015-06-16 v1

Authors: A. Karmakar , K. Dey , S. Chatterjee , S. Majumdar , S. Giri

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Abstract

CuCrS2, a Heisenberg antiferromagnet with layered edge sharing triangular lattice, exhibits a spiral magnetic order. Dielectric (E) and polarization studies show magnetoelectric (ME) coupling at Neel temperature (T_N=38 K) where simultaneous dielectric and magnetic long range order occur. The compound shows a diffused ferroelectric (FE) transition and slow relaxation dynamics above T_N, indicative of relaxor FE behavior. Interestingly, memory effect and magnetic field induced rejuvenation are also observed in E, establishing cooperative glassy dynamics and ME coupling even above T_N. We discuss the role of geometrical frustration and metal ligand hybridization for these unusual properties.

Keywords

relaxor ferroelectric CuCrS2 spin correlated dielectric memory rejuvenation magnetoelectric coupling geometrical frustration glassy dynamics

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@article{arxiv.1307.4859,
  title  = {Spin correlated dielectric memory and rejuvenation in relaxor ferroelectric CuCrS2},
  author = {A. Karmakar and K. Dey and S. Chatterjee and S. Majumdar and S. Giri},
  journal= {arXiv preprint arXiv:1307.4859},
  year   = {2015}
}

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5 pages, 3 figures

Spin correlated dielectric memory and rejuvenation in relaxor ferroelectric CuCrS2

Abstract

Keywords

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