Self-assembled antidots in La2/3Sr1/3MnO3 thin films

Self-assembled pit arrays as templates for the integration of Au nanocrystals in oxide surfaces

“…18 In a previous work we have shown that by choosing the appropriate substrate miscut angle and carefully adjusting the growth conditions, long-range ordered rows of nanopits aligned with the underlying substrate steps can be obtained in sputtered manganite La 2/3 Sr 1/3 MnO 3 (LSMO) thin lms grown on SrTiO 3 -(001) (STO) substrates. 7,19 In this article, we demonstrate the efficiency of this surface nanostructure as a nanotemplate for the fabrication of longrange ordered patterns of gold NCs (sub-50 nm range), achieving area densities around 2 Â 10 10 cm À2 hardly attainable by other methods. Guided self-organization of gold NCs is driven by selective nucleation inside the nanopits, promoting their epitaxial growth and leading to octahedral shapes in their equilibrium state in contrast to the rounded shape of NCs typically obtained by physical vapor deposition methods.…”

“…Manganite thin lms with a wide range of nominal thickness, t (3 nm < t < 250 nm), exhibiting self-organized surface nanopits, were grown by RF magnetron sputtering at a high temperature (900 C) under a pure oxygen pressure of 19 Pa. The pits size (in-plane diameter), s, and density, r, can be controlled within the ranges r $ 100 to 400 pits per mm 2 and s $ 20 to 60 nm by adjusting the growth rate through the voltage bias, 19 the substrate miscut angle and the mist value by substrate choice. 20 Here we study lms grown on top of the STO substrates at a voltage bias of $120 V corresponding to a growth rate of $1 nm min À1 .…”

Nanoscale mechanical control of surface electrical properties of manganite films with magnetic nanoparticles

“…25,[51][52][53][54] Epitaxial manganite lms are usually elastically strained due to a lattice mismatch between the lms and underlying substrates (STO in the considered case). This strain facilitates growth of various self-organized morphologies such as pit arrays [55][56][57] which can serve as templates for subsequent self-assembly of NPs. 44 The strain state in our lms is analyzed by the asymmetric reciprocal space mapping of the reection (103) for the nanostructured 100 nm thick LSMO lm grown on top of the STO substrate ( Fig.…”

Lateral parameter variations on the properties of La0.7Sr0.3MnO3 films prepared on Si (100) substrates by dc magnetron sputtering

“…In addition sputtering of LSMO has relatively high deposition rate and hence is well suited to industrial-scale large area deposition [20]. Different substrates such as SrTiO 3 (STO), LaAlO 3 , NdGaO 3 , MgO, Sapphire and Silicon are employed for the growth of high quality manganites thin film [21][22][23][24]. But for economical reason and industrial applications low cost Si substrates are preferable [25].…”