Polar magnetic oxides from chemical ordering: A new class of multiferroics

P N, Ravi Shankar ; Mishra, Swarnamayee ; Athinarayanan, Sundaresan (2020) Polar magnetic oxides from chemical ordering: A new class of multiferroics APL Materials, 8 (4). 040906. ISSN 2166-532X

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Official URL: http://doi.org/10.1063/5.0003305

Related URL: http://dx.doi.org/10.1063/5.0003305


Combining ferroelectricity and magnetism in the same material remains a challenge because it involves complex crystal chemistry and stringent symmetry requirements. In conventional ferroelectrics, the polarization arises from the second-order Jahn–Teller effect associated with cations of d0 or s2 lone pair electronic configuration. In contrast, the magnetism arises from cations with partially filled d or f electrons. Materials that incorporate these two kinds of cations in different crystallographic sites exhibit multiferroic properties but with weak coupling between magnetism and ferroelectricity. On the other hand, a strong cross-coupling occurs in some materials, where specific spin structures induce weak ferroelectricity below the magnetic ordering temperature. In this article, we discuss a new class of multiferroics where the polar distortion results from chemical ordering. These polar oxides are mainly pyroelectric in the entire temperature range and exhibit magnetoelectric coupling below the magnetic ordering temperatures.

Item Type:Article
Source:Copyright of this article belongs to AIP Publishing.
ID Code:119970
Deposited On:21 Jun 2021 04:53
Last Modified:21 Jun 2021 04:53

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