3 documents found, page 1 of 1
Strain induced enhanced ferromagnetic behavior in inhomogeneous low doped La0.9...
Das, S.; Amaral, J. S.; De, K.; Willinger, M.; Gonçalves, J. N.; Roy, A.; Dhak, P.; Giri, S.; Majumder, S.; Silva, Carlos J. R.; Gomes, M. J. M.We report an unusual high-temperature ferromagnetic transition in bulk single-phase nanocrystalline La0.95Sr0.05MnO3þd, achieved through localized strain and inhomogeneous Sr-doping. Magnetization measurements show a well defined transition at 290 K and a broad one at 150 K. HRTEM imaging reveals the strain on the highly crystalline nanometer sized grains and Sr-doping gradients, while oxygen homogeneity at the...
Strain induced enhanced ferromagnetic behavior in inhomogeneous low doped La0.9...
Das, S.; Amaral, J. S.; De, K.; Willinger, M.; Goncalves, J. N.; Roy, A.; Dhak, P.; Giri, S.; Majumder, S.; Silva, C. J. R.; Gomes, M. J. M.We report an unusual high-temperature ferromagnetic transition in bulk single-phase nanocrystalline La0.95Sr0.05MnO3+delta, achieved through localized strain and inhomogeneous Sr-doping. Magnetization measurements show a well defined transition at 290K and a broad one at similar to 150 K. HRTEM imaging reveals the strain on the highly crystalline nanometer sized grains and Sr-doping gradients, while oxygen homo...
Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3 + δ
De, K.; Das, S.; Roy, A.; Dhak, P.; Willinger, M.; Amaral, J. S.; Amaral, V. S.; Giri, S.; Majumder, S.; Silva, Carlos J. R.; Gomes, M. J. M.Unusual high temperature ferromagentism is reported for La0.95Sr0.05MnO3+δ with Curie temperatures (TC1 and TC2) TC1 at 290 K and TC2 ∼ 150 K. Weak antiferromagnetism (AFM) is thought to give low moment, low temperature irreversibility, and non-saturation up to 10 T at 5 K. A short-range ferromagnetism is predicted from well-defined hysteresis at 5 K and field-cooled (FC) magnetization curves. Strong irreversib...