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Magnetoelastic Coupling in La0.7Ca0.3MnO3/BaTiO3 Ultrathin Films



A. Alberca, N. M. Nemes, F. J. Mompean, Titusz Feher, Ferenc Simon, J. Tornos, C. Leon, C. Munuera, Brian Kirby, M. R. Fitzsimmons, A. Hernando, J. Santamaria, M. Garcia-Hernandez


The magnetism of La0.7Ca0.3MnO3 (LCMO) expitaxial thin films grown SrTi3 (STO)and BaTiO3 (BTO) substrates is studied using Polarized Neutron Reflectometry (PNR) and Ferromagnetic Resonance (FMR) techniques. PNR reveals a strongly suppressed magnetization throughout the LCMO/BTO (300 kA/m) half of the expected value with actue reduction (50 kA/m) at the BTO interface. FMR is observable at 8.9 GHz only around the [110] crystallographic direction in thin LCMO/BTO, wit the resonance field barely budging when the applied field is rotated away. The FMR results are analyzed in terms of magnetoelastic anisotropy, up to fourth order and compared to LCMO/STO twin samples. A two-layer magnetization model is proposed, based on strong out-of-plane anisotropy near the BTO interface, and shown to explain qualitatively the main characteristics of the FMR results.
Physical Review B


PNR, magnetism


Alberca, A. , Nemes, N. , Mompean, F. , Feher, T. , Simon, F. , Tornos, J. , Leon, C. , Munuera, C. , Kirby, B. , Fitzsimmons, M. , Hernando, A. , Santamaria, J. and Garcia-Hernandez, M. (2013), Magnetoelastic Coupling in La<sub>0.7</sub>Ca<sub>0.3</sub>MnO<sub>3</sub>/BaTiO<sub>3</sub> Ultrathin Films, Physical Review B, [online], (Accessed July 18, 2024)


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Created October 10, 2013, Updated October 12, 2021