首页|Relaxor ferroelectric nature and magnetoelectric coupling of the one dimensional frustrated Ca3CoMnO6
Relaxor ferroelectric nature and magnetoelectric coupling of the one dimensional frustrated Ca3CoMnO6
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NSTL
Elsevier
? 2022 Elsevier B.V.The typical ↑↑↓↓ spin order of the one-dimensional frustrated Ca3CoMnO6 breaks the inversion symmetry and results in the ferroelectricity. But the previous calculations predict a much larger ferroelectric polarization than the experimental observation. To comprehend the divergence, Ca3CoMnO6 ceramics were prepared and the magnetic, dielectric properties were studied. In accordance with the formation of short range magnetic correlation, around the antiferromagnetic transition temperature TN the Ca3CoMnO6 ceramics present weak relaxor ferroelectric nature. It implies the existence of polar nanoregions. Thus, the destruction of long range ferroelectric order and the formed polar nanoregions should be responsible for the suppressed macroscopic ferroelectric polarization. The activation energy and static freezing temperature of Ca3CoMnO6 are also calculated. The obtained values are Ea = 6.31 × 10?3 eV and Tf = 1.5 K, respectively. Both of them are lower about two orders of magnitude than the conventional relaxor ferroelectrics. Magnetic field dependent dielectric permittivity manifests the large magnetodielectric coupling of Ca3CoMnO6. Under the application of field of 7 T, the dielectric permittivity reduces by about 10%.
Magnetic frustrationMultiferroicRelaxor ferroelectric
Gong G.、Zhou J.、Duan Y.、Hu H.、Wang Y.、Cheng X.、Su Y.
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School of Physics and Electronic Engineering Zhengzhou University of Light Industry
NSTL
Elsevier
