Magnetic interaction at an interface between manganite and other transition-metal oxides
- ORNL
A general consideration is presented for the magnetic interaction at an interface between a perovskite manganite and other transition-metal (TM) oxides. The latter is specified by the electron number $$n$$ in the $$d_{3z^2-r^2}$$ level as $$(d_{3z^2-r^2})^n$$. Based on the molecular orbitals formed at the interface and the generalized Hund's rule, the sign of the magnetic interaction is rather uniquely determined. The exception is when the $$d_{3z^2-r^2}$$ orbital is stabilized in the interfacial manganite layer neighboring to a $$(d_{3z^2-r^2})^1$$ or $$(d_{3z^2-r^2})^2$$ system. In this case, the magnetic interaction is sensitive to the occupancy of the Mn $$d_{3z^2-r2}$$ orbital. It is also shown that the magnetic interaction between the interfacial Mn layer and the bulk region can be changed. Manganite-based heterostructures thus show a rich magnetic behavior. We also present how to generalize the argument including $$t_{2g}$$ orbitals.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 984392
- Journal Information:
- Physical Review B, Vol. 82, Issue 2; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Time-Resolved Spectroscopy of Insulator-Metal Transitions: Exploring Low-Energy Dynamics in Strongly Correlated Systems. Final Report
Orbital reconstruction and covalent bonding at an oxide interface.