J.S. Noh, T.K. Nath, et al.
Applied Physics Letters
We report results of quantitative magnetization studies on epitaxial thin films of La0.60Y0.07Ca0.33MnO3-δ, and La1-x□xMnO3-δ with □ standing for vacancy on the La site. The magnetization in all samples shows significant field dependent broadening of the ferromagnetic transition. Classical mean-field analysis of magnetization data in applied fields above a few Tesla leads to a magnetic cluster size of the order of a few unit cells. The density of such a magnetic cluster correlates with the doping concentration x in the compound series La1-x□xMnO3-δ. In thin films of La0.60Y0.07Ca0.33MnO3-δ, a magnetic field dependent, non-Curie-Weiss susceptibility was found in the paramagnetic state, indicating local ferromagnetic cluster formation above macroscopic ferromagnetic ordering temperature. © 1996 American Institute of Physics.
J.S. Noh, T.K. Nath, et al.
Applied Physics Letters
R.B. Laibowitz, J.Z. Sun, et al.
Applied Physics Letters
J.-M.L. Beaujour, A.D. Kent, et al.
Journal of Applied Physics
R.L. Greene, L. Krusin-Elbaum, et al.
Physical Review Letters