“…In contrast, the negative exchange interaction between the core and the shell also leads to the appearance of multiple loops. Similar behaviors can be seen in previous studies of nanowires, [32,[61][62][63] ferrimagnetic nanoisland, [64] multilayer, [65] and the BiFeO 3 /YMnO 3 antiferroelectric/ferroelectric Ising bilayer system. [66] Experimentally, triple and double hysteresis loop behaviors have been witnessed in nanoparticles, [67] and in various Py=Cu, CoFeB=Cu, CoNiP=Cu, FeGa=Py, and FeGa=CoFeB multilayered nanowires.…”