Role of oxygen defects in magnetic property of Cu doped ZnO

Structural, Optical, and Antibacterial Efficacy of Pure and Zinc-Doped Copper Oxide Against Pathogenic Bacteria

“…The magnified O 1s peak is shown in Figure 5d. The broad peak was assigned to O 2− ions at a binding energy of 533.2 eV in the Cu-O bonding of the monoclinic structure in oxygen-deficient regions [44]. XPS results confirm the structure consisting of a CuO-NS doped with Zn was in good agreement with the literature data [45,46].…”

“…The binding energy of major peaks, such as Cu 2p 3/2 and Cu 2p 1/2 , appeared at 937.5 eV and 958.4 eV, with a spin-orbit splitting of about 20.1 eV, as shown in Figure 5 c. Moreover, the presence of two satellite peaks indicated the existence of Cu 2+ located at about 10 eV higher than those of the Cu 2p 3/2 and Cu 2p 1/2 [ 42 , 43 ]. The magnified O 1s peak is shown in Figure 5 d. The broad peak was assigned to O 2− ions at a binding energy of 533.2 eV in the Cu–O bonding of the monoclinic structure in oxygen-deficient regions [ 44 ]. XPS results confirm the structure consisting of a CuO-NS doped with Zn was in good agreement with the literature data [ 45 , 46 ].…”

Effects of Copper Dopants on the Magnetic Property of Lightly Cu-Doped ZnO Nanocrystals

“…With the Cu concentration increasing, the concentration of V O + nearly remained unchanged since the Cu concentrations were too low to significantly influence the defect contribution (the defect concentration was calculated from the integral area). Many works have proven that RTFM of pure ZnO and TM-doped ZnO can be modulated through changing the concentration of oxygen vacancies, especially singly ionized oxygen vacancies by post-annealing ZnO samples in different atmospheres [30,31,37]. However, in this work, RTFM varies remarkably with increasing Cu concentration in the low doping level (~1% at most) while defects' distribution is nearly the same.…”

Effect of Cu-Dopant on the Structural, Magnetic and Electrical Properties of ZnO

“…Another study by Karamat et al [12] showed that ZnO thin film doped with 1-3 at.% Cu was ferromagnetic whereas when doped with 5 at.% Cu it had diamagnetic behavior. Cu-doped ZnO nanoparticles synthesized through sol-gel method and annealed at N 2 , O 2 , and Ar environments have wurtzite hexagonal structure and ferromagnetic behavior [4,13,14]. Iqbal et al [15] and Yildirim & Durucan [16] have successfully substituted Cu ions to ZnO matrix by using the co-precipitation method so that Cu-doped ZnO became ferromagnetic.…”