Hello,
Anyone knows the Magnetic ordering feature in LaMnO3?
Is there a superexchange through Oxygens (like in the case of simple MnO) ?
By the way, As we know the crystal structure is Orthoromblic, So what is the direction of superexchange?
Thank you soooo muchhhh
>Anyone knows the Magnetic ordering feature in LaMnO3?
You can find magnetic structure in [F. Moussa, M. Hennion, J. Rodriguez-Carvajal, H. Moudden, L. Pinsard, and A. Revcolevschi Phys. Rev. B 54, 15149]
>Is there a superexchange through Oxygens (like in the case of simple MnO)?
Yes, of course, it is superexchange through oxygen ions, there is no direct exchange.
>By the way, As we know the crystal structure is Orthorhombic, So what is the direction of superexchange?
In the mentioned paper, two exchanges were obtained: FM in-plane (ab plane) constant J1 = 0.83 meV and J2 = -0.58 meV for the AFM exchange along c.
>Wouldn't the Goodenough-Kanamori rules provide a guideline to answer the question?
In my opinion, Goodenough-Kanamori-Anderson rules is a very good starting point for qualitative analysis of the exchange structures, however, one should be aware of violation/modification of such rules due to the influence of the sidegroups, see for example [Geertsma, Wiebe, and D. Khomskii. "Influence of side groups on 90 superexchange: A modification of the Goodenough-Kanamori-Anderson rules." Physical Review B 54.5 (1996): 3011]
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science