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Aqueous Chemical Solution Deposition of Functional Double Perovskite Epitaxial Thin Films

AuthorsWang , Hailin; Frontera, Carlos CSIC ORCID; Herrero Martín, Javier CSIC ORCID; Pomar, Alberto CSIC ORCID; Pere Roura,[; Martínez Perea, Benjamín CSIC ORCID; Mestres, Narcís CSIC ORCID
KeywordsB-site cationic ordering
Chemical growth methods
Double perovskites
Polymer-assisted deposition
Issue Date27-Jul-2020
CitationChemistry - a European Journal 26(42): 9338-9347 (2020)
AbstractDouble perovskite structure (A2BB′O6) oxides exhibit a breadth of multifunctional properties with a huge potential range of applications in fields as diverse as spintronics, magneto‐optic devices, or catalysis, and most of these applications require the use of thin films and heterostructures. Chemical solution deposition techniques are appearing as a very promising methodology to achieve epitaxial oxide thin films combining high performance with high throughput and low cost. In addition, the physical properties of these materials are strongly dependent on the ordered arrangement of cations in the double perovskite structure. Thus, promoting spontaneous cationic ordering has become a relevant issue. In this work, our recent achievements by using polymer‐assisted deposition (PAD) of environmentally friendly, water‐based solutions for the growth of epitaxial ferromagnetic insulating double perovskite La2CoMnO6 and La2NiMnO6 thin films on SrTiO3 and LaAlO3 single‐crystal substrates are presented. It is shown that the particular crystallization and growth process conditions of PAD (very slow rate, close to thermodynamic equilibrium conditions) promote high crystallinity and quality of the films, as well as favors spontaneous B‐site cationic ordering.
Publisher version (URL)http://dx.doi.org/10.1002/chem.202000129
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