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Title: Emergent c -axis magnetic helix in manganite-nickelate superlattices

Journal Article · · Physical Review B
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Synchrotron SOLEIL, Gif-sur-Yvette (France)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Sorbonne Univ., Paris Cedex (France); Chinese Academy of Sciences, Ningbo (China)
  5. Argonne National Lab. (ANL), Argonne, IL (United States); Harvard Univ., Cambridge, MA (United States)
  6. Canadian Light Source, Saskatoon, SK (Canada)
  7. Sorbonne Univ., Paris Cedex (France); Synchrotron SOLEIL, Gif-sur-Yvette (France)
  8. Argonne National Lab. (ANL), Argonne, IL (United States)

Here, the nature of the magnetic order in (La2/3Sr1/3MnO3)9/(LaNiO3)3 superlattices is investigated using x-ray resonant magnetic reflectometry. We observe a new -axis magnetic helix state in the (LaNiO3)3 layers that had never been measured in nickelates, and which mediates the ~130° magnetic coupling between the ferromagnetic (La2/3Sr1/3MnO3)9 layers, illustrating the power of x-rays for discovering the magnetic state of complex oxide interfaces. Resonant inelastic x-ray scattering and x-ray absorption spectroscopy show that Ni-O ligand hole states from bulk LaNiO3 are mostly filled due to interfacial electron transfer from Mn, driving the Ni orbitals closer to an atomic-like 3d8 configuration. We discuss the constraints imposed by this electronic configuration to the microscopic origin of the observed magnetic structure. The presence of a magnetic helix in (La2/3Sr1/3MnO3)9/(LaNiO3)3 is crucial for modeling the potential spintronic functionality of this system and may be important for designing emergent magnetism in novel devices in general.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
Early Career Award; Canada Foundation for Innovation (CFI); University of Saskatchewan; National Research Council (Italy); Canadian Institutes of Health Research (CIHR); Agence Nationale de la recherche (ANR); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; SC0012704; 1047478
OSTI ID:
1487028
Alternate ID(s):
OSTI ID: 1477485; OSTI ID: 1480563
Report Number(s):
BNL-209166-2018-JAAM; PRBMDO; 145210
Journal Information:
Physical Review B, Vol. 98, Issue 18; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Figures / Tables (5)