Abstract
A new lanthanum and manganese ethylenediaminetetraacetate (EDTA) coordination polymer (EDTA4− = [(CH2N)2(CH2-COOH)(CH2COO)4]) was synthesized from La(NO3)3 and Mn(NO3)2 reagents, ethylenediaminetetraacetic acid, and water at room temperature. The structure of the new compound formed, [{La2Mn3(EDTA)3(H2O)11}·12H2O]n, was determined by the single crystal X-ray diffraction technique. The synthesis and characterization of the La(III) and Mn(II) coordination complex, characterized by FTIR spectroscopy, thermogravimetry, and differential thermal analysis of the complex, are envisaged. X-ray crystal structure determination indicates that seven- and four-coordinate modes between La(III)/Mn(Π) and H4EDTA exist. [{La2Mn3(EDTA)3(H2O)11}·12H2O]n crystallizes in the monoclinic space group C2 with unit cell parameters of a = 16.1227(17) Å, b = 14.8049(16) Å, c = 14.8736(16) Å, and β = 116.107(2)°. Using this precursor, LaMnO3 (LMO) epitaxial thin films were grown by the polymer-assisted deposition (PAD) method on (100)SrTiO3 (STO) single crystalline substrates at a temperature of 900 °C. The LMO crystallized films exhibit a (001)LMO/(001)STO out-of-plane epitaxial relationship and a smooth surface morphology.
Highlights
The use of the LaMnO3 (LMO) oxide compound in applications such as magnetic field sensors and electric field devices requires high quality, homogeneous, and uniform surface morphology thin films [1]
Some authors have experimentally found that stoichiometric LMO thin films grown on SrTiO3 single crystalline substrates present a ferromagnetic behavior [4,5]
The single crystal was grown by the slow solvent evaporation solution method at room temperature from the LaMnO3 (LMO) precursor solution prepared by the polymer-assisted deposition (PAD) technique
Summary
The use of the LaMnO3 (LMO) oxide compound in applications such as magnetic field sensors and electric field devices requires high quality, homogeneous, and uniform surface morphology thin films [1]. For a perfect stoichiometry in LMO films, the magnetic ground states are expected to be A-type antiferromagnetic. Some authors have experimentally found that stoichiometric LMO thin films grown on SrTiO3 single crystalline substrates present a ferromagnetic behavior [4,5]. It is unanimously accepted that the composition, microstructure, and morphology of the final compound strongly depends on the precursor’s nature. In this context, the use of single source
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