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Suppression and reemergence of directional transport across the ferromagnetic transition in SrRuO3

  • Smriti Bhatia
  • Neha Sharma
  • Srishti Bhardwaj
  • Shruti Roy
  • Dirk Fuchs
  • Tulika Maitra
  • Vivek Kumar Malik
  • Kaushik Sen
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Abstract

SrRuO3 is a canonical itinerant ferromagnet that continues to serve as a fertile platform for exploring spin-orbit coupled transport and topological responses in correlated oxide metals. Here, we investigate a (110)-oriented epitaxial SrRuO3 thin film on DyScO3, where crystallographic anisotropy allows for symmetry-resolved charge transport along orthogonal in-plane directions. We uncover two principal findings. First, the resistance above the Curie temperature Tc,on≈ 165 K exhibits strong anisotropy, consistent with directionally dependent spin-fluctuation scattering. Below Tc,on, this anisotropy nearly vanishes, despite persistent structural inequivalence, due to isotropic electron-magnon and electron-electron scattering processes. Second, the application of a magnetic field reveals a striking directional contrast in the linear magnetoresistance (MR): it remains negative and saturates along [001], but changes sign and becomes positive along [11̅0] below T0=145 K. In contrast, the quadratic MR term is identical for both directions and peaks near TOHE*=155 K, where the ordinary Hall coefficient crosses zero, consistent with carrier compensation under a two-band scenario. A sign change in the anomalous Hall signal at TAHE*=150 K is consistent with a temperature-dependent redistribution of Berry-curvature contributions near the Fermi level. These results establish ferromagnetic ordering as the primary driver of the observed directional magnetotransport in SrRuO3.

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Cite

BibTeXRIS
BibTeX
@misc{bhatia2026suppression,
  title = {{Suppression and reemergence of directional transport across the ferromagnetic transition in SrRuO$_3$}},
  author = {Smriti Bhatia and Neha Sharma and Srishti Bhardwaj and Shruti Roy and Dirk Fuchs and Tulika Maitra and Vivek Kumar Malik and Kaushik Sen},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.27791},
  eprint = {2610.27791},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.27791},
}
RIS
TY  - UNPB
TI  - Suppression and reemergence of directional transport across the ferromagnetic transition in SrRuO_3
AU  - Smriti Bhatia
AU  - Neha Sharma
AU  - Srishti Bhardwaj
AU  - Shruti Roy
AU  - Dirk Fuchs
AU  - Tulika Maitra
AU  - Vivek Kumar Malik
AU  - Kaushik Sen
PY  - 2026
DA  - 2026/10/20
PB  - arXiv
DO  - 10.48550/arxiv.2610.27791
UR  - https://arxiv.org/abs/2610.27791
AB  - SrRuO_3 is a canonical itinerant ferromagnet that continues to serve as a fertile platform for exploring spin-orbit coupled transport and topological responses in correlated oxide metals. Here, we investigate a (110)-oriented epitaxial SrRuO3 thin film on DyScO_3, where crystallographic anisotropy allows for symmetry-resolved charge transport along orthogonal in-plane directions. We uncover two principal findings. First, the resistance above the Curie temperature T_c,on≈ 165 K exhibits strong anisotropy, consistent with directionally dependent spin-fluctuation scattering. Below T_c,on, this anisotropy nearly vanishes, despite persistent structural inequivalence, due to isotropic electron-magnon and electron-electron scattering processes. Second, the application of a magnetic field reveals a striking directional contrast in the linear magnetoresistance (MR): it remains negative and saturates along [001], but changes sign and becomes positive along [11̅0] below T_0=145 K. In contrast, the quadratic MR term is identical for both directions and peaks near T_OHE^*=155 K, where the ordinary Hall coefficient crosses zero, consistent with carrier compensation under a two-band scenario. A sign change in the anomalous Hall signal at T_AHE^*=150 K is consistent with a temperature-dependent redistribution of Berry-curvature contributions near the Fermi level. These results establish ferromagnetic ordering as the primary driver of the observed directional magnetotransport in SrRuO_3.
ER  -