Reverse Monte Carlo study of local structural and magnetic cross-correlations in x=1/3 (La,Ca) manganites

Authors
Mompean, FJ Mellergard, A Garcia-Hernandez, M Sanchez-Soria, D de Andres, A McGreevy, RL Martinez, JL
Citation
Fj. Mompean et al., Reverse Monte Carlo study of local structural and magnetic cross-correlations in x=1/3 (La,Ca) manganites, J ALLOY COM, 323, 2001, pp. 404-407
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
323
Year of publication
2001
Pages
404 - 407
Database
ISI
SICI code
0925-8388(20010712)323:<404:RMCSOL>2.0.ZU;2-U
Abstract
Local deviations from the average magnetic and atomic structure of La0.67Ca 0.33MnO3 are explored by combining neutron diffraction and reverse Monte Ca rlo techniques. Short range FM Mn-Mn spin pair correlations are found to be a majority well above T-e, while AF correlations between first neighbour p airs of Mn ions develop preferentially around Ti and within those pairs wit h a distance larger than the average first neighbour Mn-Mn distance. These results agree with the predictions of current theories on phase transitions in double exchange systems. (C) 2001 Elsevier Science B.V. All rights rese rved.