Nonmagnetic B-site impurity-induced ferromagnetic tendency in CE-type manganites
- Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing
- ORNL
Using a two-orbital model and Monte Carlo simulations, we investigate the effect of nonmagnetic B-site substitution on half-doped CE-type manganites. The lattice defects induced by this substitution destabilize the CE phase, which transforms into 1 the ferromagnetic FM metallic competing state, 2 a regime with short-range FM clusters, or 3 a spin-glass state, depending on couplings and on the valence of the B-site substitution. While a C-type antiferromagnetic state is usually associated with an average eg charge density of less than 0.5, the nonmagnetic B-site substitution that lowers the eg charge density is still found to enhance the FM tendency in our simulations. The present calculations are in qualitative agreement with experiments and provide a rationalization for the complex role of nonmagnetic B-site substitution in modulating the phase transitions in manganites.
- 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:
- 961775
- Journal Information:
- Physical Review B, Vol. 79, Issue 2; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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