Effect of La 0.7 Sr 0.3 MnO 3 crystal structures on magnetization of (1 1 1) oriented La 0.7 Sr 0.3 MnO 3 –SrRuO 3 superlattices - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2016

Effect of La 0.7 Sr 0.3 MnO 3 crystal structures on magnetization of (1 1 1) oriented La 0.7 Sr 0.3 MnO 3 –SrRuO 3 superlattices

Résumé

A series of superlattices consisting of 15 bilayers of ferromagnetic La0.7Sr0.3MnO3 (LSMO) and SrRuO3 (SRO) were grown with either stacking order on (1 1 1) oriented SrTiO3 (STO) substrates using the pulsed laser deposition technique. The Raman spectra of these superlattices show the existence of rhombohedral and orthorhombic crystal structures of LSMO in (111)STO/[11-unit cell (u.c.) LSMO/n-u.c. SRO]X15 superlattices with n  =  2 and 3. Interestingly, the Raman spectra of (1 1 1)STO/[11-u.c. SRO/n-u.c. LSMO]X15 superlattices with n  =  2 and 3 show only the orthorhombic structure of LSMO. The (1 1 1)STO/[11-u.c. LSMO/n-u.c. SRO]X15 superlattices exhibit enhanced magnetization with weak antiferromagnetic coupling whereas reduced magnetization with strong antiferromagnetic coupling is observed in (1 1 1)STO/[11-u.c. SRO/n-u.c. LSMO]X15 superlattices. The observed magnetic properties of these superlattices can be explained by the interfacial structural coupling, as evident from their Raman spectra which suggest a modification in the stereochemistry of Mn at the interfaces.
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hal-02118551 , version 1 (03-05-2019)

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Wilfrid Prellier, B Behera, P. Padhan. Effect of La 0.7 Sr 0.3 MnO 3 crystal structures on magnetization of (1 1 1) oriented La 0.7 Sr 0.3 MnO 3 –SrRuO 3 superlattices. Journal of Physics: Condensed Matter, 2016, 28 (19), pp.196004. ⟨10.1088/0953-8984/28/19/196004⟩. ⟨hal-02118551⟩
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