Magnetic structure of L{i_{1 - x}}N{i_{1 + x}}{o_2} |
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| Authors: | M.D. Núnez-Regueiro E. Chappel G. Chouteau C. Delmas |
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| Affiliation: | (1) Grenoble High Field Magnetic Laboratory, MPI-FKF and CNRS, BP 166, 38042 Grenoble Cedex 9, France, FR;(2) Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, école Nationale Supérieure de Chimie et de Physique de Bordeaux, avenue A. Schweitzer, 33608 Bordeaux, France, FR |
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| Abstract: | We study the magnetic structure of layered Li1-xNi1+xO2 and propose a new scheme: the AF interaction between the excess Ni2+ in the Li layers and the Ni3+ ions in the Ni planes, gives rise to the formation of ferrimagnetic clusters, which control the physics of these systems. The values of the different interactions are estimated from a mean field calculation in the high temperature limit. For the small x samples studied here the method does not yield an accurate value of , but it is very sensitive to the intralayer interactions, allowing to conclude that they are ferromagnetic. The recent proposal of a quantum spin-orbital liquid in this system is discussed and the comparison with Jahn-Teller distorted NaNiO2 is made. Received 8 December 1999 |
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| Keywords: | PACS. 75.10.-b General theory and models for magnetic ordering - 75.30.Et Exchange and superexchange interactions |
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