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Room Temperature Polar and Weak-Ferromagnetic Oxide with Low Dielectric Loss

SSRN, ISSN: 1556-5068
2023
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    176
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      152
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      24

Article Description

Single-phase materials that are simultaneously ferroelectric and ferromagnetic at room temperature are promising for devices such as non-volatile random access memory. Perovskite BiFeO3 which crystallizes in the polar rhombohedral structure (R3c) is ferroelectric and antiferromagnetic at room temperature. Here, we report a family of perovskite oxides in the BiFeO3 – Bi2/3TiO3 – ATiO3 (where A2+= Ca2+, Sr2+, Ba2+) ternary phase diagram that is polar as well as weak ferromagnetic above room temperature. The composition (Bi0.9167A0.075)(Fe0.9Ti0.1)O3 crystallizes in the polar rhombohedral structure space group R3c as corroborated by powder X-ray and neutron diffraction analysis. The nearly pure A-site perovskite possesses a long-range magnetic ordering above room temperature. These perovskites show a low dielectric loss, and the electrical response is dominated by grain contributions below 723 K.

Bibliographic Details

Nagamalleswari katragadda; Pranab Mandal; Premkumar Yanda; Sundaresan Athinarayanan; Som Datta Kaushik; Weiguo Zhang; P. Shiv Halasyamani; Alicia Manjón-Sanz

Elsevier BV

Multidisciplinary; Perovskites; Multiferroic; weak ferromagnetic; polar; and impedance spectroscopy

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