マルチフェロイック六方晶マンガン酸化物のボルテックス分域構造と新奇物性

抄録

Characteristic behavior and physical properties associated with the vortex domain structure in multiferroic hexagonal manganites RMnO₃（R＝Y, and Ho）have been investigated mainly using transmission electron microscopy and high angle annular dark field scanning transmission electron microscopy. The insulating nature due to peculiar local structures is found at the vortex domain boundaries. In addition, unique 180° charged ferroelectric boundaries originated from the vortex domain formation are discovered, leading to selective boundary conduction related to bound charge screening.