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Stable humplike Hall effect and noncoplanar spin textures in SrRuO 3 ultrathin films

DOI: 10.1103/PhysRevResearch.3.023232 DOI Help

Authors: Byungmin Sohn (Seoul National University; Institute for Basic Science, Seoul) , Bongju Kim (Seoul National University; Institute for Basic Science, Seoul) , Se Young Park (Seoul National University; Institute for Basic Science, Seoul; Soongsil University) , Hwan Young Choi (Yonsei University) , Jae Young Moon (Yonsei University) , Taeyang Choi (Chung-Ang University) , Young Jai Choi (Yonsei University) , Hua Zhou (Advanced Photon Source) , Jun Woo Choi (Korea Institute of Science and Technology) , Alessandro Bombardi (Diamond Light Source; University of Oxford) , Dan. G. Porter (Diamond Light Source) , Seo Hyoung Chang (Chung-Ang University) , Jung Hoon Han (Sungkyunkwan University) , Changyoung Kim (Seoul National University; Institute for Basic Science)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Research , VOL 3

State: Published (Approved)
Published: June 2021
Diamond Proposal Number(s): 22181

Open Access Open Access

Abstract: We observed a humplike feature in Hall effects of SrRuO 3 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 SrRuO 3 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.

Journal Keywords: Magnetic texture; Skyrmions; Topological Hall effect; Topological materials; Thin films; Ultrathin films

Diamond Keywords: Skyrmions; Ferromagnetism; Data Storage

Subject Areas: Materials, Physics

Instruments: I16-Materials and Magnetism

Added On: 23/06/2021 08:42


Discipline Tags:

Surfaces Quantum Materials Hard condensed matter - electronic properties Physics Components & Micro-systems Information & Communication Technologies Magnetism Materials Science interfaces and thin films

Technical Tags:

Scattering Resonant Elastic X-ray Scattering (REXS)