Engineering multiferroism in CaMnO3.
作者： Satadeep Bhattacharjee , Eric Bousquet , Philippe Ghosez
DOI: 10.1103/PHYSREVLETT.102.117602
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摘要: Structural instabilities of CaMnO3 are investigated from first principles. We point out that, on top a strong antiferrodistortive instability responsible for its orthorhombic ground state, the cubic perovskite structure also exhibits weak ferroelectric instability. Although ferroelectricity is suppressed by motions, we show that it can be favored using strain or chemical engineering in order to make multiferroic. finally highlight Mn-dominated. This illustrates contrary common belief, and magnetism not necessarily exclusive but driven same cation.
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