Rapid Thermal Annealing of Double Perovskite Thin Films Formed by Polymer Assisted Deposition

Abstract

The annealing process is an important step common to epitaxial films prepared by chemical solution deposition methods. It is so because the final microstructure of the films can be severely affected by the precise features of the thermal processing. In this work we analyze the structural and magnetic properties of double perovskite La2CoMnO6 and La2NiMnO6 epitaxial thin films prepared by polymer-assisted deposition (PAD) and crystallized by rapid thermal annealing (RTA). It is found that samples prepared by RTA have similar values of saturation magnetization and Curie temperature to their counterparts prepared by using conventional thermal annealing (CTA) processes, thus indicating low influence of the heating rates on the B-B’ site cationic ordering of the A2BB’O6 double perovskite structure. However, a deeper analysis of the magnetic behavior suggested some differences in the actual microstructure of the films.

Substitutional effect of Mg2+ on structural and magnetic properties of La2MgxNi1‐xMnO6 double‐perovskite thin films

“…Secondly, the RSM asymmetry (103) planes of the LM x NMO thin films are scanned to obtain the stress/strain information in the films, 34–38 as described in Figure 2(b–f). The (103) peak positions of all the films are located below that of the LAO substrate, indicating that these films are under in‐plane compressive stress 36 . Furthermore, based on the Q x and Q y values of the diffraction peaks, the lattice constants of the LM x NMO thin films can be calculated by the following equations.…”

“…Secondly, the RSM asymmetry (103) planes of the LM x NMO thin films are scanned to obtain the stress/strain information in the films, [34][35][36][37][38] as described in Figure 2(b-f). The (103) peak positions of all the films are located below that of the LAO substrate, indicating that these films are under in-plane compressive stress.…”

“…The (103) peak positions of all the films are located below that of the LAO substrate, indicating that these films are under in-plane compressive stress. 36 Furthermore, based on the Q x and Q y values of the diffraction peaks, the lattice constants of the LM x NMO thin films can be calculated by the following equations.…”

High-Performance Indium–Tin Oxide (ITO) Electrode Enabled by a Counteranion-Free Metal–Polymer Complex

“…10−12 The advantages of the PAD approach, compared to the sol−gel process, are the precise control of the film thickness, easy achievement of homogeneous doping concentration in large area, and the use of the conventional coating technologies. 13,14 A variety of inorganic thin films have been synthesized by the PAD process, including metal oxides, 15−17 metal carbides, 18−20 metal nitrides, 21−24 and metal chalcogenides 13,25 for the potential uses in magnetics, 15,26,27 optoelectronics, 14,28 and superconductors. 21,24 Transparent flexible conductors have been produced successfully through metal nanowires, 29−31 monolayer graphene, 32,33 and metal grids, 34,35 composite of metal and amorphous carbon films, 36,37 and printed metal lines.…”

“…Stable complexation of metal cations has been readily achieved by chelating with small molecules and effectively prevented the formation of metal hydroxides. Ethylenediaminetetraacetic acid (EDTA) has been extensively used for the metal complex anion in the form of [M-EDTA] (4– n )– , where n is valence of the metal ion. − Polyethyleneimine (PEI) is commonly used to bind to the metal complex anions. , PEI can be protonated to give positive charges and make the solution basic, [−CH 2 CH 2 –NH−] n + H 2 O [−CH 2 CH 2 –NH 2 + −] n + OH – ; hence, the electrostatic attraction between [M-EDTA] (4– n )– and the amines results in homogeneous metal–polymer complexes. − The advantages of the PAD approach, compared to the sol–gel process, are the precise control of the film thickness, easy achievement of homogeneous doping concentration in large area, and the use of the conventional coating technologies. , A variety of inorganic thin films have been synthesized by the PAD process, including metal oxides, − metal carbides, − metal nitrides, − and metal chalcogenides , for the potential uses in magnetics, ,, optoelectronics, , and superconductors. , …”