Interdiffusion effect on strained La0.8Ba0.2MnO3 thin films by off-axis sputtering on SrTiO3 (100) substrates

Abstract

Microstructures and resistivity of cuprate/manganite bilayer deposited on SrTiO 3 substrate Effect of substrate-film lattice mismatch in La 0.7 Ba 0.3 MnO 3−δ thin films for transport properties

Electronic Properties of Fully Strained La1–xSrxMnO3 Thin Films Grown by Molecular Beam Epitaxy (0.15 ≤ x ≤ 0.45)

“…However, discrepancies between the expected ferromagnetic and the actual paramagnetic insulating behaviors of LSMO 21 as a function of doping (e.g., in Horiba et al., 20 only Sr ≈ 0.3 and 0.4 doping levels do show an FM behavior at room temperature) often question possible oxygen vacancies 22 as well as the La/Sr/Mn stoichiometry. 21 , 23 − 25 Hence, there is a need to investigate in-detail a systematic study of Sr-doped La 1– x Sr x MnO 3 films by careful tuning of the La/Sr cation ratio using the powerful molecular beam epitaxy (MBE) technique and by fixing the thickness realizing how the physical properties in thin films are affected with respect to the epitaxial strain imposed by the underlying substrate. 26 …”

“…Although several studies have been performed on manganites, for instance, Hishida et al investigated the relationship between the valence-band X-ray photoelectron spectroscopy (XPS) spectral weights to the electrical conductivity of the entire Sr doping series of the polycrystalline La 1– x Sr x MnO 3 samples, whereas Horiba et al studied the loss of spectral weight at the Fermi level and subsequent increase in the shoulder of the O 1s X-ray absorption spectroscopy (XAS) spectra and suggested pseudo-gap formation with an increase in Sr doping in PLD-grown La 1– x Sr x MnO 3 films. However, discrepancies between the expected ferromagnetic and the actual paramagnetic insulating behaviors of LSMO as a function of doping (e.g., in Horiba et al., only Sr ≈ 0.3 and 0.4 doping levels do show an FM behavior at room temperature) often question possible oxygen vacancies as well as the La/Sr/Mn stoichiometry. ,− Hence, there is a need to investigate in-detail a systematic study of Sr-doped La 1– x Sr x MnO 3 films by careful tuning of the La/Sr cation ratio using the powerful molecular beam epitaxy (MBE) technique and by fixing the thickness realizing how the physical properties in thin films are affected with respect to the epitaxial strain imposed by the underlying substrate …”