Our work centers on magnetic thin films (Fe, Co, Ni) and their coupling with adjacent physical mechanisms — gas adsorption, electric fields, two-dimensional materials, and emergent magnetic phases. The goal is tunable, often reversible control over magnetic order and electron transport, with implications for next-generation sensors and spintronic devices.
We study how hydrogen absorption and diffusion reversibly modify the magnetic behavior of Pd-based alloy and multilayer films. By engineering Fe/Pd/Fe, Co/Pd, and FePd systems, we show that hydrogen can rotate the magnetic easy axis by 90°, modulate interlayer coupling, and induce measurable changes in magneto-transport.
These findings open device concepts: programmable magnetic anisotropy, H₂ / CO dual-gas sensors, and hydrogen-gated spintronic elements.
Two-dimensional magnets — Fe₃GaTe₂, FePS₃, and related layered compounds — combine atomic thinness with intrinsic magnetic order. We investigate their interfacial coupling with conventional ferromagnets and with 2D materials such as graphene, hBN, and MoS₂.
Recent work includes localized creation of bubble domains via conductive AFM, exchange coupling at Co/FePS₃ interfaces, and laser-stability of Gr/h-BN-protected MoS₂.
Topological spin textures — skyrmions and bubble domains — carry information with topological protection. In collaboration with our partners in Japan and Europe, we create, image, and move such textures in magnetic multilayers and vdW ferromagnets.
The goal: low-power, high-density information encoding schemes based on current-driven motion of topological solitons.
Altermagnets — a newly recognized class of magnetic order — exhibit spin-split electronic bands without net magnetization, a possibility that had long been thought incompatible. We are exploring candidate altermagnetic materials and interfaces, and how they may host spin currents and magneto-transport phenomena beyond the conventional ferromagnet / antiferromagnet dichotomy.
This is an emerging theme; our contributions build on our long expertise in exchange bias, non-collinear magnetism, and thin-film heterostructures.
Ongoing
Functional oxides, multiferroics, and organic/inorganic hybrids at magnetic film interfaces produce properties neither constituent possesses alone. We probe electric-field control of magnetism (Fe/ZnO, Co/BaTiO₃), interfacial exchange coupling in YIG/CoO bilayers, and the magnetic response of perovskite-based heterostructures.
These studies lay the groundwork for voltage-controlled and multiferroic spintronic devices.