Title: Reversal of Anomalous Hall Effect and Octahedral Tilting in SrRuO 3 Thin Films via Hydrogen Spillover

Journal Article · · Advanced Materials
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [3];  [1]; ORCiD logo [4];  [1];  [1]; ORCiD logo [5]; ORCiD logo [1]
  1. Nano Systems from Ions, Spins, and Electrons (NISE) Max Planck Institute of Microstructure Physics 06120 Halle (Saale) Germany
  2. Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USA
  3. ALBA Synchrotron Light Source Cerdanyola del Vallès Barcelona E‐08290 Spain
  4. Materials Science Division Argonne National Laboratory Lemont IL 60439 USA
  5. Nano Systems from Ions, Spins, and Electrons (NISE) Max Planck Institute of Microstructure Physics 06120 Halle (Saale) Germany, Institute for Theoretical Physics Johannes Kepler University Linz 4040 Austria

Abstract The perovskite SrRuO 3 (SRO) is a strongly correlated oxide whose physical and structural properties are strongly intertwined. Notably, SRO is an itinerant ferromagnet that exhibits a large anomalous Hall effect (AHE) whose sign can be readily modified. Here, a hydrogen spillover method is used to tailor the properties of SRO thin films via hydrogen incorporation. It is found that the magnetization and Curie temperature of the films are strongly reduced and, at the same time, the structure evolves from an orthorhombic to a tetragonal phase as the hydrogen content is increased up to ≈0.9 H per SRO formula unit. The structural phase transition is shown, via in situ crystal truncation rod measurements, to be related to tilting of the RuO 6 octahedral units. The significant changes observed in magnetization are shown, via density functional theory (DFT), to be a consequence of shifts in the Fermi level. The reported findings provide new insights into the physical properties of SRO via tailoring its lattice symmetry and emergent physical phenomena via the hydrogen spillover technique.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1899197
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 3 Vol. 35; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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