Structure and magnetic properties of La2/3Sr1/3MnO3/CaMnO3 multilayers

M. GRANADA, M. SIRENA, L. B. STEREN, G. LEYVA

Buenos Aires, Argentina

Conferencia; At the frontiers of Condensed Matter 2004; 2004

Structural and magnetic properties of manganite-based multilayers, La2/3Sr1/3MnO3/CaMnO3, composed of ferromagnetic metals and antiferromagnetic insulator barriers areinvestigated in this work. Compounds of similar lattice parameters were used to build thesamples, so we expect an excellent stacking of the different layers along the structure. To geta first insight of this system, the crystalline structure of a series of samples, grown on (1 0 0)SrTiO3 and (1 0 0) MgO single-crystalline substrates, has been studied. X-ray diffractionpatterns show that the structure is strongly textured in the (1 0 0) direction when grown onSrTiO3, regardless the composition of the bottom layer. A different result is found on thesame system grown on MgO: when the buffer layer is CaMnO3, the structure grows in the (11 0) orientation while it grows in the (1 0 0) direction when the bottom layer is La2/3Sr1/3MnO3. Magnetic coupling of the ferromagnetic layers across the antiferromagnetic spacerhas been studied with magnetization measurements.