Crystalline symmetry controlled magnetic switching in epitaxial (111) La_0.7Sr_0.3MnO₃ thin films

Exchange coupling in (111)-orientedLa0.7Sr0.3MnO3/Jia1, Chopdekar2, Arenholz3 et al. 2015Phys. Rev. B142120View full textAdd to dashboardCite

“…This result suggests that the crystalline anisotropy is low between along the < 112 > and < 110 > directions lying within the (111) plane. This behavior is consistent with the low magnetocrystalline anisotropy of the LSMO layers measured by Mn XMCD, which has been observed in (111)-oriented single layer LSMO film 47 .…”

Thickness dependence of exchange coupling in (111)-oriented perovskite oxide superlattices

“…2(c) were measured at 10 K after cooling with an applied field of 2 T along the in-plane [110] direction. (111)-oriented LSMO thin films have low magnetocrystalline anisotropy [16] and a low coercive field of 1 mT, which is also the case for the bilayer with a thick LSMO sublayer with a coercive field of 2 mT. In comparison, a coercivity enhancement was found in all three superlattices, which is a signature of exchange coupling, though the lack of horizontal shifts suggests that the form of exchange coupling is not exchange bias.…”

“…Finally, the orientation of the films also plays an important role. (001)-oriented La 0.7 Sr 0.3 MnO 3 (LSMO) films under tensile strain have biaxial anisotropy along the in-plane 110 axes [15], while (111)-oriented LSMO films have low magnetocrystalline anisotropy in the (111) plane with a sixfold symmetry along the 110 and 11 2 directions [i.e., two low-index families of directions lying within the (111) plane] [16]. Among these tuning parameters, the study of the effect of orientation on the behavior of perovskite oxide thin films has been comparatively limited, with most research being focused on (001)-oriented perovskite heterostructures.…”

Property control from polyhedral connectivity in ABO3 oxides

“…These approaches include using chemical pressure, 5 cation size effects, 6 and doping in bulk oxides. In addition, epitaxial strain, 7,8 proximity and confinement effects, [9][10][11][12][13] and substrate orientation (geometric lattice engineering) in heterostructures [14][15][16][17] and superlattices 18,19 of thin film oxides.…”