11 citations · 12 across the 3 of their papers we have counts for
5 papers
Restructuring in bimetallic core-shell nanoparticles: Real time observation
Nobutomo Nakamura, Koji Matsuura, Akio Ishii +1
The formation process of core-shell bimetallic nanoparticles synthesized by sputtering onto a substrate is observed in real time using an originally developed acoustic technique. T…
The angular dependence of magnetization dynamics induced by a GHz range strain pulse
Kakeru Tojo, Akira Nagakubo, Hirotsugu Ogi
The dynamics of magnetization is important in spintronics, where the coupling between phonon and magnon attracts much attention. In this work, we study the angular dependence of th…
Elastic constant of dielectric nano-thin films using three-layer resonance studied by picosecond ultrasonics
Hiroki Fukuda, Akira Nagakubo, Hirotsugu Ogi
Elastic constants and sound velocities of nm-order thin films are essential for designing acoustic filters. However, it is difficult to measure them for dielectric thin films. In t…
Interplanar stiffness in defect-free monocrystalline graphite
Koichi Kusakabe, Atsuki Wake, Akira Nagakubo +4
The interplanar bond strength in graphite has been identified to be very low owing to the contribution of the van der Waals interaction. However, in this study, we use microscopic…
Perturbation theories behind thermal mode spectroscopy for high-accuracy measurement of thermal diffusivity of solids
Hideshi Ishida, Hirotsugu Ogi
Thermal mode spectroscopy (TMS) has been recently proposed for accurately measuring thermal diffusivity of solids from a temperature decay rate of a specific thermal mode selected…