Transverse Ising nano-systems: Unconventinal surface effects

• Phase diagrams and magnetizations are examined for some nanosystems.
• The effects of surface parameters on them are examined by the EFT.
• Some novel and universal features are obtained for these systems.
• The possibility of re-entrant phenomena is proposed.

The phase diagrams and temperature dependences of magnetizations in core–shell transverse Ising nanosystems, namely nanowire, nanotube and nanoparticles, are studied by the use of the effective-field theory with correlations (EFT). Some novel and universal features, such as the possibility of re-entrant phenomena being free from disorder induced frustration, are obtained for the magnetic properties in such systems.