Kondo-like effect in the double exchange ferromagnet La0.5−xCexSr0.5MnO3

Sundaresan, A ; Tholence, J.L ; Maignan, A ; Raveau, B ; Suard, E ; Bordet, P (2001) Kondo-like effect in the double exchange ferromagnet La0.5−xCexSr0.5MnO3 Journal of Magnetism and Magnetic Materials, 226-23 . pp. 777-779. ISSN 0304-8853

Full text not available from this repository.

Official URL: http://doi.org/10.1016/S0304-8853(00)01323-8

Related URL: http://dx.doi.org/10.1016/S0304-8853(00)01323-8


Neutron diffraction and magnetic measurements on La0.5−xCexSr0.5MnO3 (x⩽0.4) reveal that both the Mn-moments (for all x) and the Ce-moments (x⩾0.2) order ferromagnetically at different temperatures. Since Ce- and Mn-moments are coupled antiferromagnetically below T∼100 K, they form a ferrimagnetic ground state. Further, for x=0.3 and 0.4, the temperature dependence of resistivity shows a maximum and a minimum, in contrast to a metallic behavior expected from double exchange ferromagnetism and large band width W. These results suggest an antiferromagnetic Kondo interaction between the localized Ce : 4f and polarized conduction (Mn : eg) electrons in a ferromagnetic Kondo lattice formed by the local Mn : t2g and itinerant eg spins.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:120195
Deposited On:23 Jun 2021 12:46
Last Modified:23 Jun 2021 12:46

Repository Staff Only: item control page