Thickness and angular dependent magnetic anisotropy of La 0.67 Sr 0.33 MnO 3 thin films by Vectorial Magneto Optical Kerr Magnetometry

S K Chaluvadi (1) , P. Perna (2) , F Ajejas (2) , J Camarero (3, 4) , A Pautrat (5) , S Flament (1) , Laurence Méchin (1)

1 Equipe Electronique - Laboratoire GREYC - UMR6072
2 Instituto IMDEA Nanociencia [Madrid]
3 Institute IMDEA Materials [Madrid]
4 UAM - Universidad Autónoma de Madrid
5 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

We investigate the in-plane magnetic anisotropy in La 0.67 Sr 0.33 MnO 3 thin films grown on SrTiO 3 (001) substrate using angular dependent room temperature Vectorial Magneto-Optical Kerr Magnetometry. The experimental data reveals that the magnetic anisotropy symmetry landscape significantly changes depending upon the strain and thickness. At low film thickness (12 and 25 nm) the dominant uniaxial anisotropy is due to interface effects, step edges due to mis-cut angle of SrTiO 3 substrate. At intermediate thickness, the magnetic anisotropy presents a competition between magnetocrystalline (biaxial) and substrate step induced (uniaxial) anisotropy. Depending upon their relative strengths, a profound biaxial or uniaxial or mixed anisotropy is favoured. Above the critical thickness, magnetocrystalline anisotropy dominates all other effects and shows a biaxial anisotropy.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Micro et nanotechnologies/Microélectronique

S K Chaluvadi, P. Perna, F Ajejas, J Camarero, A Pautrat, et al.. Thickness and angular dependent magnetic anisotropy of La 0.67 Sr 0.33 MnO 3 thin films by Vectorial Magneto Optical Kerr Magnetometry. 8th Joint European Magnetic Symposia (JEMS2016), Aug 2016, Glasgow, United Kingdom. pp.12021, ⟨10.1088/1742-6596/903/1/012021⟩. ⟨hal-01631199⟩