Phase diagrams in an Ising nanotube (or nanowire) with a diluted surface; Effects of interlayer coupling at the surface

The phase diagrams and magnetizations of two nanosystems (nanotube and nanowire) with a dilution at the surface are investigated by the use of the effective field theory with correlations. In particular, the effects of interlayer coupling between the surface and the core on them are discussed for the two systems. Some interesting phenomena have been found in the phase diagrams and the thermal variations of magnetizations, especially for the nanotube with a very high dilution and the possibility of two compensation points in the nanowire with a small interlayer coupling.