Engineering the magnetic order in epitaxially strained Sr&lt;sub&gt;1−x&lt;/sub&gt;Ba&lt;sub&gt;x&lt;/sub&gt;MnO&lt;sub&gt;3&lt;/sub&gt; perovskite thin films

Maurel, L.; Marcano, N.; Langenberg, E.; Guzmán, R.; Prokscha, T.; Magén, C.; Pardo, J.A.; Algarabel, P.A.

doi:10.1063/1.5090824

Engineering the magnetic order in epitaxially strained Sr_1−xBa_xMnO₃ perovskite thin films

Maurel L, Marcano N, Langenberg E, Guzmán R, Prokscha T, Magén C, Pardo JA & Algarabel PA

Citation

Maurel, L., Marcano, N., Langenberg, E., Guzmán, R., Prokscha, T., Magén, C., … Algarabel, P. A. (2019). Engineering the magnetic order in epitaxially strained Sr_1−xBa_xMnO₃ perovskite thin films. APL Materials, 7(4), 041117 (7 pp.). https://doi.org/10.1063/1.5090824

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:21210

Chemical doping and epitaxy can be used to tailor the magnetoelectric properties of multiferroic thin films, such as SrMnO₃. Here, we study the dependence of the magnetic order temperatures of Sr_1−xBa_xMnO₃ thin films on epitaxial strain and Ba content. Combining low-energy muon spin spectroscopy and scanning transmission electron microscopy, the broadness of the magnetic transition is attributed to the presence of a Mn-O-Mn angle gradient along the out-of-plane direction. We also demonstrate that the unit cell volume is the key parameter to determine the Néel temperature in Sr_1−xBa_xMnO₃ thin films showing G-type antiferromagnetic order. The occurrence of a simultaneously ferroelectric and ferromagnetic ground state at high strain levels is suggested for the Sr_0.8Ba_0.2MnO₃ thin film deposited on TbScO₃.