76 citations · 254 across the 7 of their papers we have counts for
7 papers
Photovoltaic effect by soft phonon excitation
Yoshihiro Okamura, Takahiro Morimoto, Naoki Ogawa +7
Photodetection is an indispensable function of optoelectronic devices in modern communication and sensing systems. Contrary to the near-infrared/visible regions, the fast and sensi…
Magnetic anisotropy of -ordered FePt thin films studied by Fe and Pt -edges x-ray magnetic circular dichroism
K. Ikeda, T. Seki, G. Shibata +12
The strong perpendicular magnetic anisotropy of -ordered FePt has been the subject of extensive studies for a long time. However, it is not known which element, Fe or Pt…
Electromagnon resonance in a collinear spin state of a polar antiferromagnet Fe2Mo3O8
T. Kurumaji, Y. Takahashi, J. Fujioka +4
Magnetic excitations are investigated for a hexagonal polar magnet Fe2Mo3O8 by terahertz spectroscopy. We observed magnon modes including an electric-field active magnon, electroma…
Unidirectional terahertz light absorption in the pyroelectric ferrimagnet CaBaCo4O7
S. Bordács, V. Kocsis, Y. Tokunaga +5
Spin excitations were studied by absorption spectroscopy in CaBaCo4O7 which is a type-I multiferroic compound with the largest magnetic-order induced ferroelectric polarization (ΔP…
Thickness-dependent magnetic properties and strain-induced orbital magnetic moment in SrRuO3 thin films
K. Ishigami, K. Yoshimatsu, D. Toyota +16
Thin films of the ferromagnetic metal SrRuO3 (SRO) show a varying easy magnetization axis depending on the epitaxial strain and undergo a metal-to-insulator transition with decreas…
Electromagnons in the multiferroic state of perovskite manganites with symmetric-exchange striction
Y. Takahashi, S. Ishiwata, S. Miyahara +5
We have investigated electrically-active magnetic excitations (electromagnons) in perovskite manganites with the -type (up-up-down-down) spin structure by terahertz spectroscopy…
Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites
N. Kida, Y. Takahashi, J. S. Lee +7
Recent spectroscopic studies at terahertz frequencies for a variety of multiferroics endowed with both ferroelectric and magnetic orders have revealed the possible emergence of a n…