Low-temperature MFM studies of CMR manganites
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We have performed low-temperature Magnetic Force Microscopy (MFM) studies of colossal magneto-resistive (CMR) (La0.67Ca0.33)MnO3 films prepared by physical vapor codeposition (PVCD). The samples exhibit sharp metal-insulator transitions at Tc =265 K, and 120 nm grain structures. MFM studies performed down to T = 77 K showed irregularly-shaped magnetic features at temperatures below Tc. Characteristic magnetic domain sizes were 1-2 m, which exceeds the grain size for these films, implying coherence across grain boundaries in this system. 2000 Elsevier Science B.V. All rights reserved.
Physica C: Superconductivity
author list (cited authors)
Xiao, G., Ross, J. H., Parasiris, A., Rathnayaka, K., & Naugle, D. G.