Temperature dependence of the magnetization of La0.67Sr0.33MnO3 thin films on LaAlO3

Abstract

The authors report on the interplay between magnetically ordered phases with temperature and magnetic field across compressively strained interfaces of thin La 0:67 Sr 0:33 MnO 3 films on LaAlO 3 substrates. From the temperature dependence of the magnetization and resistivity studies, they find two distinct temperature regimes, where this interplay is clearly exhibited. They ascribe this to the strain induced Jahn-Teller-like distortion that favors the stabilization of the d 3z 2 Àr 2 orbitals and enhances superexchange between adjoining Mn atoms. The temperature and field sweep of the magnetization and electronic transport lead to a hybridization between the closely spaced energy levels of d 3z 2 Àr 2 and d x 2 Ày 2 orbitals leading to the coexistence of ferromagnetic and antiferromagnetic phases. Such an observation, not reported earlier, offers new routes for the design and study of magnetic textures in variously strained interfaces between perovskite oxides.

Temperature-dependent periodicity halving of the in-plane angular magnetoresistance in La0.67Sr0.33MnO3 thin films on LaAlO3

“…One manganite, in particular, La 0.67 Sr 0.33 MnO 3 (LSMO), has attracted much attention due to its high Curie temperature of 360 K. Using pulsed laser deposition (PLD), epitaxial thin films of LSMO can be grown with minimal oxygen vacancies. 15 Thickness-dependent thin film studies in LSMO led to new findings such as a shift in Curie temperature, [16][17][18] coexisting magnetic phases, 16,19 and the presence of magnetic dead layers. [20][21][22][23][24] In addition to controlling film thickness, the influence of strain induced by an underlying substrate 6 on the angle-dependent magnetotransport in LSMO thin films has been investigated.…”

“…The films used in our experiments have been grown using PLD with an excimer (KrF) laser using the previously published parameters. 19 The growth of both films were monitored in situ, using reflection high-energy electron diffraction (RHEED), to verify a smooth epitaxial growth (see the supplementary material, Fig. S1).…”

Surface anisotropy induced spin wave nonreciprocity in epitaxial La0.33 Sr0.67 MnO3 film on SrTiO3 substrate

“…6 After termination, the thin film of LSMO was grown using pulsed laser deposition. 41,42 Our system uses a KrF (248 nm) laser. Before the film deposition, the substrate was heated to 750 C, with a background pressure of 0.35 mbar of pure oxygen.…”

Angle-dependent magnetoresistance in epitaxially strain-engineered thin films

“…Based on our earlier work and that of others [12,14,50], we estimate the Curie temperatures of the samples to correspond closely to the peak in AdMR%. This results in Curie temperatures of 265 K, 180 K, and 130 K for the -0.7%, 0.9% and 1.9% strain samples, respectively.…”

“…Obvious candidates, in our field of expertise, are complex oxides as they contain a wide range of desirable material properties and can be doped [44], stacked with other complex oxides [39,50], or strained to observe skyrmions. Of the complex oxide family, we picked La 0.67 Sr 0.33 MnO 3 (LSMO), as we believe that tailoring the right magnetic environment will result in the observation of skyrmions in thin films of La 0.67 Sr 0.33 MnO 3 .…”