Magnetic anisotropy of an extended double exchange model for layered manganites: A Monte Carlo study
Supercomputing Center, Korea Institute of Science and Technology Information, Yuseong, PO Box
122, Daejeon 305-600, Korea
Corresponding author: a firstname.lastname@example.org
Published online: 6 March 2003
The magnetic ground state properties of layered manganites are investigated on the basis of an anisotropic double exchange model using a Monte Carlo technique. The temperature dependence of magnetization and spin-spin correlations are calculated in a highly anisotropic hopping integral regime. The ferromagnetic ordering temperature (Tc) is suppressed by introducing , and eventually a layered ferromagnetic structure appears along the c-axis, but there are block-walls. The significant change of magnetic anisotropy is also observed for the antiferromagnetic superexchange integral . We discuss the connection of these results to the magnetic anisotropy observed in the La1.4Sr1.6Mn2O7.
PACS: 75.50.Cc – Other ferromagnetic metals and alloys / 75.30.Et – Exchange and superexchange interactions / 75.30.-m – Intrinsic properties of magnetically ordered materials / 72.10.-d – Theory of electronic transport; scattering mechanisms
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003