Interface ferromagnetism in a SrMnO3/LaMnO3 superlattice
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Univ. of Illinois at Urbana-Champaign, IL (United States); University of Illinois
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Illinois at Urbana-Champaign, IL (United States)
Resonant soft x-ray absorption measurements at the O K edge on a SrMnO3/LaMnO3 superlattice show a shoulder at the energy of doped holes, which corresponds to the main peak of resonant scattering from the modulation in the doped hole density. Scattering line shape at the Mn L3,2 edges has a strong variation below the ferromagnetic transition temperature. This variation has a period equal to half the superlattice superperiod and follows the development of the ferromagnetic moment, pointing to a ferromagnetic phase developing at the interfaces. It occurs at the resonant energies for Mn3+ and Mn4+ valences. A model for these observations is presented, which includes a double-exchange two-site orbital and the variation with temperature of the hopping frequency tij between the two sites.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357; AC02-98CH10886; FG02-06ER46285; FG02-07ER46453; FG02-07ER46471
- OSTI ID:
- 1958849
- Alternate ID(s):
- OSTI ID: 1101838
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 17 Vol. 86; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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