K. Onuma

Spin dynamics and spin freezing behavior in the two-dimensional antiferromagnet NiGa$_{2}$S$_{4}$ revealed by Ga-NMR, NQR and $\mu$SR measurements (2007)

Takeya, H., Ishida, K., Kitagawa, K., Ihara, Y., Onuma, K., Maeno, Y., ...

We have performed $^{69,71}$Ga nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) and muon spin rotation/resonance on the quasi two-dimensional antiferromagnet (AFM)...

Unusual superexchange pathways in a Ni triangular lattice of NiGa$_2$S$_4$ with negative charge-transfer energy (2007)

Takubo, K., Mizokawa, T., Nambu, Y., Onuma, K., Tonomura, H., ...

We have studied the electronic structure of the Ni triangular lattice in NiGa$_2$S$_4$ using photoemission spectroscopy and subsequent model calculations. The cluster-model analysis of the Ni 2$p$...

In vitro bioactivity of starch thermoplastic/hydroxyapatite composite biomaterials: an in situ study using atomic force microscopy (2003)

Leonor, I. B., Ito, A., Onuma, K., Kanzaki, N., Reis, R. L.

The in vitro bioactivity of a composite composed by a biodegradable starch-based polymeric matrix and hydroxyapatite fillers was investigated, in situ, as a function of immersion time in a simulated...

In situ study of partially crystallized Bioglass and hydroxylapatite in vitro bioactivity using atomic force microscopy (2002)

Leonor, I. B., Ito, A., Onuma, K., Kanzaki, N., Zhong, Z. P., Greenspan, D., ...

The present work investigates, in situ, the in vitro bioactivity of partially crystallized 45S5 Bioglass® (BG) as a function of immersion time in a simulated body fluid (SBF) using atomic force...