Emergence of topological Hall effect in half-metallic manganite thin films by tuning perpendicular magnetic anisotropy

Abstract

Magnetic materials hosting topological spin textures like magnetic skyrmion exhibit nontrivial Hall effect, namely, topological Hall effect (THE). In this study, we demonstrate the emergence of THE in thin films of half-metallic perovskite manganites. To stabilize magnetic skyrmions, we control the perpendicular magnetic anisotropy by imposing a compressive epitaxial strain as well as by introducing a small Ru doping. When the perpendicular magnetic anisotropy is tuned so that it is balanced with the magnetic dipolar interaction, the film exhibits a sizable THE in a magnetization reversal process. Real-space observations indicate the formation of skyrmions and some of them have high topological charge number. The present result opens up the possibility for novel functionalities that emerge under keen competition between the skyrmion phase and other rich phases of perovskite manganites with various orders in spin, charge, and orbital degrees of freedom.

7 pages, 9 figures

References in corpus (6)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Tunable Room Temperature Magnetic Skyrmions in Ir/Fe/Co/Pt Multilayers
• A centrosymmetric hexagonal magnet with superstable biskyrmion magnetic nanodomains in a wide temperature range of 100K to 340K
• Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films
• Chirality induced anomalous-Hall effect in helical spin crystals
• Synthesizing Skyrmion Molecules in Fe-Gd Thin Films

Cited by in corpus (16)

• Giant topological Hall effect in correlated oxide thin films
• Oxide spin-orbitronics: spin-charge interconversion and topological spin textures
• Topological Hall Effect and Emergent Skyrmion Crystal in Manganite-Iridate Oxide Interfaces
• Tailoring Magnetism in Self-intercalated Cr1+δTe2 Epitaxial Films
• Topological Hall effect in thin films of Mn${}_{1.5}$PtSn
• Berry phase manipulation in ultrathin SrRuO${}_3$ films
• Planar Topological Hall Effect from Conical Spin Spirals
• Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions
• Oxygen Vacancy-Induced Topological Hall effect in a Nonmagnetic Band Insulator
• Role of magnetic exchange interactions in chiral-type Hall effects of epitaxial Mn${}_x$PtSn films
• Electrically driven spin torque and dynamical Dzyaloshinskii-Moriya interaction in magnetic bilayer systems
• Magnetic Anisotropy and Its Structural Origins in Ru-Substituted Manganite Films
• Anomalous magnetoentropic response of skrymion crystals
• Sn${}_{0.06}$Cr${}_3$Te${}_4$: A Skyrmion Superconductor
• Atomic Origins of Magnetic Anisotropy in Ru-substituted Manganite Films
• Evolution of magnetic bubble domains in the uniaxial ferromagnet CeRu${}_2$Ga${}_2$B inferred from the Hall effect and ac magnetic susceptibility