Physics - Sciene

          Ferroelectric materials posses spontaneous polarization which can be reverse by applying an external electric field over a certain temperature range. Ferroelectric materials belong to special types of
crystals (non-centrosymmetric structure). Ferroelectric materials have a lot of industrial applications in medicine, environment and communications, etc. There are Many  ferroelectric materials such as

The analytical method is used to derive the formulae of optical properties for magnetic lens and deflector. From these formulae, the optical properties are computed for both magnetic lens and deflector. The minimum spherical and chromatic aberration coefficients (axial, magnification and rotation chromatic aberration coefficients) are selected from the results of calculation for both magnetic lens and deflector.The inverse power law model is adopted to obtain the axial field distribution of magnetic lenses.

A computer program based on Monte Carlo method had been designed and written in visual basic computer language and utilized for simulating the classic problem of gamma ray beam incident on finite plane slabs of absorbing materials.