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

Published

October 11, 2013

Author(s)

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

Abstract

The magnetism of La_0.7Ca_0.3MnO₃ (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.

Citation

Physical Review B

Volume

88

Issue

13

Pub Type

Journals

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Keywords

PNR, magnetism

Citation

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_0.7Ca_0.3MnO₃/BaTiO₃ Ultrathin Films, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=913486 (Accessed December 3, 2024)