posted on 2019-09-25, 00:13authored byAlexis Boileau, Marie Dallocchio, Florent Baudouin, Adrian David, Ulrike Lüders, Bernard Mercey, Alain Pautrat, Valérie Demange, Maryline Guilloux-Viry, Wilfrid Prellier, Arnaud Fouchet
New paradigms are required in microelectronics when the transistor
is in its downscaling limit and integration of materials presenting
functional properties not available in classical silicon is one of
the promising alternatives. Here, we demonstrate the possibility to
grow La0.67Sr0.33MnO3 (LSMO) functional
materials on amorphous substrates with properties close to films grown
on single-crystalline substrates using a two-dimensional seed layer.
X-ray diffraction and electron backscatter diffraction mapping demonstrate
that the Ca2Nb3O10– nanosheet (NS) layer induces epitaxial stabilization of LSMO films
with a strong out-of-plane (001) texture, whereas the growth of LSMO
films on uncoated glass substrates exhibits a nontextured polycrystalline
phase. The magnetic properties of LSMO films deposited on NS are similar
to those of the LSMO grown on SrTiO3 single-crystal substrates
in the same conditions (which is used as a reference in this work). Moreover, transport measurements
take advantages of the texture and polycrystalline properties to induce
low-field magnetoresistance at low temperature and also a high value
of 40% magnetoresistance from 10 to 300 K, making it interesting for
sensor applications. Therefore, the NS seed layer offers new perspectives
for the integration of functional materials grown at moderate temperatures
on any substrate, which will be the key for the development of oxitronics.