Magnetism, charge ordering, and metal-insulator transition in the lanthanum manganites
Data(s) |
15/04/1997
|
---|---|
Resumo |
We examine the magnetic and structural properties of the lanthanum manganite-based double-exchange magnets exhibiting colossal magnetoresistance. A model Hamiltonian containing the double-exchange, superexchange, and the Hubbard terms, with parameters obtained from density–functional calculations (Ref. 1), is studied within a mean-field approximation both at temperature T=0 and T>0 and with the effects of the magnetic field included. The phase diagrams we obtain with magnetic and charge-ordered phases enable us to examine the competition between the double- and superexchange terms as functions of doping and temperature. Our theoretical study provides a qualitative understanding of the phase diagram observed in the experiments. © 1997 American Institute of Physics. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/38292/1/Magnetism%2C_charge_ordering.pdf Mishra, SK and Pandit, R and Satpathy, S (1997) Magnetism, charge ordering, and metal-insulator transition in the lanthanum manganites. In: Journal of Applied Physics, 81 (8). p. 4977. |
Publicador |
American Institute of Physic |
Relação |
http://jap.aip.org/resource/1/japiau/v81/i8/p4977_s1 http://eprints.iisc.ernet.in/38292/ |
Palavras-Chave | #Physics |
Tipo |
Editorials/Short Communications PeerReviewed |