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CaBaCo4O7: A ferrimagnetic pyroelectric
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DOI：10.1103/PhysRevB.90.045129.png)
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Abstract
En 中文
Magnetoelectric coupling in pyroelectric CaBaCo4O7 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 similar to 17mC/m(2). Furthermore, Landau theory demonstrates that magnetoelastic coupling in CaBaCo4O7 is responsible for the strong magnetoelectric coupling appearing close to the magnetic phase transition.
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POLARIZATION
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