Room-temperature epitaxial growth of NiO(111) thin films by pulsed laser deposition

Epitaxial NiO (100) and NiO (111) films grown by atomic layer deposition

“…The FWHM values are summarized in Table 1. The PLD films also show broadening in the j direction as observed in this study [7]. By calculating the in-plane and out-of-plane cell parameters it was found that the a-axis shows small changes with This result is in line with previous results from PLD films, where it was found that the epitaxial quality was increased by increasing the oxygen partial pressure.…”

“…The formation of twins is common for 111 films on hexagonal (0 0 l) substrates because the two orientations have very similar energy of formation. Twin formation has also been reported from films deposited by laser ablation [7]. At all the applied temperatures the epitaxial relationships for the NiO (111) films are NiO (111) …”

“…Low-temperature epitaxial growth of nickel oxide has been reported by using laser ablation techniques. Epitaxial films were obtained at temperatures as low as room temperature at oxygen partial pressures below 1.3 Pa [7][8][9].…”

“…The a-Al 2 O 3 (0 0 l) surface resembles the structure of a closed packed surface and has a mismatch to NiO (111) of 7% in the ½1 0 1 direction and about 6.8% in the ½1 2 1 direction. There are also reports of epi-NiO growth on a larger cell with 4 NiO (111) unit cells that match with 3 unit cells of a-Al 2 O 3 (0 0 l) to give a mismatch of 4.5% [7].…”

Room-temperature synthesis of epitaxial oxide thin films for development of unequilibrium structure and novel electronic functionalization

“…38) Furthermore, up to 50 mol % Li + -ion in a nickel oxide of LiNiO 2 with ¡-NaFeO 2 type crystal structure (hexagonal phase) is considered to be a possible cathode material for the future generations of Li-ion batteries. 39) Many studies have been conducted on the deposition of NiO epitaxial thin films with RT processess, 40), 41) but there are few reports on the fabrication of NiO thin films containing large amount of Li + -ions (over 50 mol %) using an RT process, with regard to the crystalline and electrical characterization of these films. Here we demonstrate RT-synthesis of NiO epitaxial thin films with 60 mol % Li + -ion content using a laser MBE process at RT.…”