Artificial magnetism in a carbon diamond nanolattice with the spin orientation effect

摘要

In this paper, we investigate the spin orientation effects on the magnetic properties of the Carbon diamond nanolattice (CDNL) by using Kaneyoshi approach (KA) within the effective field theory. In our calculations, we use the normalized lattice constant (na = 3.566 = a/1 A(0)) which is obtained from the real lattice constant (a = 3.566 A(0)) of the CDNL. The CDNL has three different magnetic atoms according to nearest-neighbor, and they are defined as corner atoms (m(c)), face atoms (m(f)) and inner atoms (m(i)). For m(c), m(f) and m(j), the CDNL has eight spin orientations as +++ (up arrow up arrow up arrow), -++ (down arrow up arrow up arrow), ++- (up arrow up arrow down arrow), -+- (down arrow up arrow down arrow), --+ (down arrow down arrow up arrow), ---(down arrow down arrow down arrow), +--(up arrow down arrow down arrow) and +-+ (up arrow down arrow up arrow), respectively. We find that the CDNL has two kinds of critical temperature behaviors, we call them as high critical temperature behavior (HCTB) for the first four spin orientations and low critical temperature behavior (LCTB) for the second four spin orientations. However, the CDNL exhibits ferromagnetic (FM), antiferromagnetic (AFM), superconductivity (SC), discontinuous diamagnetic (DM) and discontinuous paramagnetic (PM) hysteresis behaviors according to the spin orientation of its atoms. Therefore, we suggest that it is possible to obtain different magnetic behaviors and artificial magnetism from the Carbon and Carbon-based materials with the spin orientations of their atoms. (C) 2016 Elsevier B.V. All rights reserved.