Stable humplike Hall effect and noncoplanar spin textures in SrRuO3 ultrathin films

Byungmin Sohn, Bongju Kim, Se Young Park, Hwan Young Choi, Jae Young Moon, Taeyang Choi, Young Jai Choi, Hua Zhou, Jun Woo Choi, Alessandro Bombardi, Dan G. Porter, Seo Hyoung Chang, Jung Hoon Han, Changyoung Kim

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

We observed a humplike feature in Hall effects of SrRuO3 ultrathin films, and systematically investigated it by controlling thicknesses, temperatures and magnetic fields. The humplike feature is extremely stable, even surviving as a magnetic field is tilted by as much as 85∘. Based on the atomic-level structural analysis of a SrRuO3 ultrathin film with a theoretical calculation, we reveal that atomic rumplings at the thin-film surface enhance Dzyaloshinskii-Moriya interaction, which can generate stable chiral spin textures and a humplike Hall effect. Moreover, temperature dependent resonant x-ray measurements at the Ru L edge under a magnetic field showed that the intensity modulation of unexpected peaks was correlated with the hump region in the Hall effect. We verify that the two-dimensional property of ultrathin films generates stable noncoplanar spin textures having a magnetic order in a ferromagnetic oxide material.

Original languageEnglish
Article number023232
JournalPhysical Review Research
Volume3
Issue number2
DOIs
Publication statusPublished - 2021 Jun

Bibliographical note

Publisher Copyright:
© 2021 authors. Published by the American Physical Society.

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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