Signatures of enhanced ordering temperatures in digital superlattices of (LaMnO{sub 3}){sub m}/(SrMnO{sub 3}){sub 2m}.
Digital superlattices of (LaMnO{sub 3}{sub m}/SrMnO{sub 3}){sub 2m} (m{<=}3) having the same nominal composition as La{sub 1/3}Sr{sub 2/3}MnO{sub 3}, an antiferromagnetic insulator, have been synthesized by means of molecular beam epitaxy. All superlattices show a sharp resistive maximum at temperatures near to or higher than the Neel temperature of bulk La{sub 1/3}Sr{sub 2/3}MnO{sub 3}. No discernible signatures of magnetic ordering are observed near the resistivity peak for m{<=}2, but m=3 has a susceptibility peak consistent with antiferromagnet ordering, which is canted when cooled in a small magnetic field. Analogies are drawn to d{sub x2-y2} orbitally ordered, layered antiferromagnetic manganites to explain the observations.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 915020
- Report Number(s):
- ANL/MSD/JA-59627
- Journal Information:
- Appl. Phys. Lett., Journal Name: Appl. Phys. Lett. Journal Issue: 05/31/2007 Vol. 90; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- ENGLISH
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