Title: Interplay between transport, magnetic-, and structural properties of Mn-perovskites with various doping level
Authors: Wagner, P ×
Gordon, Ivan
Das, Arabinda
Vanacken, Johan
Moshchalkov, Victor
Bruynseraede, Yvan #
Issue Date: Dec-2000
Publisher: World Scientific
Series Title: International Journal of Modern Physics B, Condensed Matter Physics, Statistical Physics, Applied Physics vol:14 issue:29-31 pages:3735-3740
Abstract: We performed a comparative study on the colossal negative magnetoresistivity and the Hall effect in thin films of the manganese perovskite La1-xCaxMnO3 with x = 0.3 and x = 0.67. The underdoped sample (x = 0.3) undergoes a phase transition from a paramagnetic semiconductor to a ferromagnetic quasimetal at the Curie temperature T-C = 280 K,while the overdoped compound (x = 0.67) stays a paramagnetic semiconductor at all temperatures. Both materials show colossal negative magnetoresistivity, albeit on considerably different temperature- and field scales, depending on the magnetic interactions between neighbouring Mn ions. According to the Hall data, the charge carriers in the underdoped material are hole-type, partially compensated by an electron-type contribution. The overdoped system shows electronic carriers with a thermally activated concentration. The ordinary Hall effect is in both compounds superimposed by an anomalous Hall contribution with a sign opposite to the intrinsic charge-carrier type.
ISSN: 0217-9792
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science