Figure 5
From: Uncoupled surface spin induced exchange bias in α-MnO2 nanowires
Origination of magentic moment.
(a), Comparison of surface states of (1 0 0), (0 1 0) and (2 1 0) planes in α-MnO2 nanowires composed of MnO6 octahedra. The highlighted parts indicate the weak linked MnO6 octahedral chains on the (2 1 0) plane when it is at the surface. (b), Electron configuration of the Mn 3d levels of Mn4+ and the induced magnetic moment in MnO6 octahedron.
