Longitudinal spin Seebeck effect in a half-metallic La0.7Sr0.3MnO3

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

“…1,2 Recently, perovskite LSMO is attracting more and more interest in the field of spintronics due to recent observations of the electric field tunability of the magnetoresistance, spin Seebeck effect, and critical temperature of magnetic phase transitions. [3][4][5][6][7][8][9][10] Moreover, epitaxial LSMO on a SrTiO 3 (STO) substrate is also attractive for the study of spin wave transmission [11][12][13][14] due to its low Gilbert damping 15 of a $ 10 À4 and low lattice mismatch with the substrate, which make it a promising candidate for a spin wave transmission study. 16 Spin waves possess interesting characteristics such as high-speed information processing due to their high frequency up to THz and their fairly low energy consumption due to the absence of charge current.…”

Role of spin mixing conductance in determining thermal spin pumping near the ferromagnetic phase transition in EuO1−x and La2NiMnOMallick1, Wagh2, Ionescu3 et al. 2019Phys. Rev. B210150View full textAdd to dashboardCite

“…However, in this study, we focus only on the monotonic decrease above 175K that extends up to T c . In analogy to previous reports, this region could be fitted to a (T c -T ) P power law 14,25,34,35 .…”

“…Measurements on thick films of YIG/Pt by Wang et al 14 obtained V LSSE ∝ (T c − T ) 1.5 . Other than YIG, LSSE(T ) for two other manganites namely, La 0.7 Sr 0.3 MnO 3 35 and La 0.7 Ca 0.3 MnO 3 25 could be described by, (T c − T ) 1.9 . and (T c − T ) 0.7 respectivelty.…”

Temperature Dependence of the Spin Seebeck Effect in a Mixed Valent Manganite

“…For instance, a report using the transverse geometry failed to detect any voltage corresponding to the SSE in La 0.67 Sr 0.33 MnO 3 , and concluded that the observed magneto-thermoelectric voltages were entirely comprised of anomalous and planar Nernst effect signals [22]. On the other hand, a subsequent LSSE measurement on the same system suggested that more than 95% of the thermally driven voltage arises from the magnonic spin current contribution alone, with the ANE contribution being barely discernible [18]. In this letter, we report temperature dependent LSSE measurements of the closely related La 0.7 Ca 0.3 MnO 3 system in an attempt to resolve this apparent contradiction.…”

“…Junctions comprising of the ferrimagnetic insulator Y 3 Fe 5 O 12 (YIG) and Pt are now recognized as being model systems for investigations of the LSSE, and recent measurements have focused on the dependence of the LSSE signals on control parameters like temperature [5,[9][10][11], magnetic field [12,13] and sample thickness [14,15]. Temperature dependent LSSE measurements have also revealed a remarkable correlation of this quantity with intrinsic properties of the magnetic material, and a few strongly correlated systems have been explored in this fashion [16][17][18].…”