CaBaCo${}_4$O${}_7$ : A ferrimagnetic pyroelectric

Abstract

Magneto-electric coupling in pyroelectric CaBaCo${}_4$O${}_7$ is investigated using ab-intio calculations and Landau theory. The former shows that exchange-striction is strong enough to produce a giant change in electric polarization upon ferrimagnetic ordering, comparable to the experimentally determined value of ~17 mC/m${}^2$ . Furthermore, Landau theory demonstrates that magneto-elastic coupling in CaBaCo${}_4$O${}_7$ is responsible for the strong magneto-electric coupling appearing close to the magnetic phase transition.

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• Spin-Orbit Coupling and Ion Displacements in Multiferroic TbMnO3
• Effect of magnetic disorder and strong electron correlations on the thermodynamics of CrN
• Competing magnetic interactions in the extended Kagome system YBaCo4O7
• Magnetic-induced phonon anisotropy in ZnCr${}_2$O${}_4$ from first principles
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Cited by in corpus (7)

• Competing Exchange Interactions in the Multiferroic and Ferrimagnetic CaBaCo${}_4$O${}_7$
• Giant magnetostriction and nonsaturating electric polarization up to 60 T in the polar magnet CaBaCo4O7
• Structural, magnetic and electronic properties of CaBaCo4-xMxO7 (M= Fe, Zn)
• Switching from pyroelectric to ferroelectric order in Ni doped CaBaCo4O7
• \textit{Ab initio} study on spin fluctuations of itinerant kagome magnet FeSn
• Terahertz frequency magnetoelectric effect in Ni doped CaBaCo${}_4$O${}_7$
• Relieving Geometrical frustration through doping in the Dy${}_{1-x}$Ca${}_x$BaCo${}_4$O${}_7$ Swedenborgites