59 citations · 135 across the 14 of their papers we have counts for
15 papers
Significant modulation of acoustoelectric current associated with charge density wave transitions
Natsumi Nikaido, Takuya Kawada, Koji Fujiwara +5
We studied acoustoelectric (AE) currents in materials that undergo charge density wave (CDW) transitions, induced by a surface acoustic wave (SAW) on a piezoelectric substrate. The…
Electrical detection of spin-flip transition in metal/\ce{Na_5Co_{15.5}Te_6O_{36}} heterostructure
Hirotsugu Tagami, Takuya Kawada, Yuki Shiomi
We report on the longitudinal magnetoresistance (MR) in thin metal films on an Ising-type antiferromagnetic insulator, \ce{Na_5Co_{15.5}Te_6O_{36}} (\ce{NCTO}). Steep changes in th…
Hydrogenation-induced gigantic resistance decrease of palladium films deposited by high pressure magnetron sputtering
Yusuke Ikeda, Takuya Kawada, Yuki Shiomi
We demonstrate a pronounced decrease in the electrical resistance of highly disordered palladium (Pd) films deposited under a high working Ar pressure using a compact film coating…
Observation of Shapiro Steps in the Charge Density Wave State Induced by Strain on a Piezoelectric Substrate
Koji Fujiwara, Takuya Kawada, Natsumi Nikaido +4
Recent development in nanotechnology has enabled us to investigate the dynamic properties of van der Waals materials on a piezoelectric substrate. Here we report on the dynamics of…
Nonlinear planar Hall effect from superconducting vortex motion
Mio Hashimoto, Takako Konoike, Tomoki Kobayashi +6
We report the nonreciprocal charge transport along the longitudinal and transverse directions in the vortex flow regime of FeSe superconducting films. Clear nonreciprocal signals u…
Model calculations of the strains associated with surface acoustic waves
Takuya Kawada, Masashi Kawaguchi, Hiroki Matsumoto +1
Magnon-phonon coupling has garnered increasing interest in condensed matter physics due to its fertile physics and potential applications in devices with novel functionalities. Sur…
Spin current generation by acousto-electric evanescent wave
Takuya Kawada, Masashi Kawaguchi, Kei Yamamoto +5
We experimentally demonstrate that a spin current can be induced by the acousto-electric evanescent wave, an electric field associated with surface acoustic waves (SAWs) that decay…
Electromagnetic evanescent field associated with surface acoustic wave: Response of metallic thin films
Takuya Kawada, Kei Yamamoto, Masashi Kawaguchi +5
Surface acoustic waves (SAWs), coherent vibrational modes localized at solid surfaces, have been employed to manipulate and detect electronic and magnetic states in condensed-matte…
Acoustoelectric non-local spin wave power detector for studying magnon-phonon coupling
Hiroki Matsumoto, Yasuhiro Todaka, Takuya Kawada +2
We have developed a simple detection scheme to study spin waves excited by surface acoustic wave (SAW) in ferromagnetic thin films. Metallic antennas made of Ta and a ferromagnetic…
Magnon-phonon coupling of synthetic antiferromagnets in a surface acoustic wave cavity resonator
Hiroki Matsumoto, Isamu Yasuda, Motoki Asano +4
We use a surface acoustic wave (SAW) cavity resonator to study the coupling of acoustic magnons in a synthetic antiferromagnet (SAF) and the phonons carried by SAWs. The SAF is com…
On-chip all-electrical determination of the magnetoelastic coupling constant of magnetic heterostructures
Takuya Kawada, Isamu Yasuda, Masashi Kawaguchi +1
We have developed an approach to determine the magnetoelastic coupling constant of magnetic layers in thin film heterostructures. The film is formed on a piezoelectric substrate be…
Helicity resolved Raman spectroscopy of mono- and a few-layers thick PtSe
Isamu Yasuda, Takuya Kawada, Hiroki Matsumoto +2
We studied helicity resolved Raman scattering in PtSe flakes with different thicknesses. The peak amplitude of helicity-switched Raman scattering is significantly larger than t…
Large surface acoustic wave nonreciprocity in synthetic antiferromagnets
Hiroki Matsumoto, Takuya Kawada, Mio Ishibashi +2
We have studied the transmission of surface acoustic waves (SAWs) in ferromagnetic/non-magnetic/ferromagnetic tryilayers. The SAW scattering matrix is studied for devices with vari…
Acoustic spin Hall effect in strong spin-orbit metals
Takuya Kawada, Masashi Kawaguchi, Takumi Funato +2
We report on the observation of the acoustic spin Hall effect that facilitates lattice motion induced spin current via spin orbit interaction (SOI). Under excitation of surface aco…
Unidirectional planar Hall voltages induced by surface acoustic waves in ferromagnetic thin films
Takuya Kawada, Masashi Kawaguchi, Masamitsu Hayashi
The electromotive forces induced by surface acoustic waves (SAWs) are investigated in ferromagnetic thin films. CoFeB thin films deposited on LiNbO substrates are patterned int…