Surendra B. Anantharaman, Joachim Kohlbrecher, et al.
MRS Fall Meeting 2020
Paper
On the energy of {100} coincidence twist boundaries in MgO
Abstract
The energy of coincidence twist boundaries formed by rotation about a [100] axis in MgO crystals has been calculated using the Born-Mayer potential and rigid lattice approximation. It is found that the four prominent coincidence twist boundaries at 16.26, 22.62, 28.07, and 36.87° have local energy minima. The coincidence boundary formed by a rotation of 28.07° has a positive contribution to energy from the electrostatic term and therefore has the shallowest minima. This is in agreement with experimental observations on crystals of MgO smoke. © 1972.
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