Hysteresis behavior of Blume–Capel model on a cylindrical Ising nanotube

• In this work, we have investigated surface shell and core magnetization of spin-1 Ising nano-tube by employing EFT with correlations.
• We present comprehensive calculations of hysteresis loops and coercivities for both ferro- and anti-ferromagnetic situations.
• Double and triple hysteresis loops are found and dependencies of coercivities are drawn as a function of temperature.
• Superparamagnetic phases are found when the interaction is reduced between core and shell layers.

We have investigated Blume–Capel model on a cylindrical Ising nanotube by using the effective field theory with correlations. Hysteresis loops, magnetic susceptibility and coercivities have been calculated numerically for ferromagnetic and antiferromagnetic cases. When interactions are low between the core and shell sites, double and triple hysteresis loops can be seen in the system for ferro- and antiferromagnetic interactions, respectively. The effect of temperature has been examined on hysteresis loops and dependencies of coercivity based on temperature are depicted.