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Journal Article
Ferromagnetic CaRuO3
2014
Overview
The non-magnetic and non-Fermi-liquid CaRuO
3
is the iso-structural analog of the ferromagnetic (FM) and Fermi-liquid SrRuO
3
. We show that an FM order in the orthorhombic CaRuO
3
can be established by the means of tensile epitaxial strain. The structural and magnetic property correlations in the CaRuO
3
films formed on SrTiO
3
(100) substrate establish a scaling relation between the FM moment and the tensile strain. The strain dependent crossover from non-magnetic to FM CaRuO
3
was observed to be associated with switching of non-Fermi liquid to Fermi-liquid behavior. The intrinsic nature of this strain-induced FM order manifests in the Hall resistivity too; the anomalous Hall component realizes in FM tensile-strained CaRuO
3
films on SrTiO
3
(100) whereas the non-magnetic compressive-strained films on LaAlO
3
(100) exhibit only the ordinary Hall effect. These observations of an elusive FM order are consistent with the theoretical predictions of scaling of the tensile epitaxial strain and the magnetic order in tensile CaRuO
3
. We further establish that the tensile strain is more efficient than the chemical route to induce FM order in CaRuO
3
.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
