Superconducting properties of Pr-based Filled skutterudite PrRu$_4$As$_{12}$ (2007)
Namiki, T., Aoki, Y., Sato, H., Sekine, C., Shirotani, I., Matsuda, T. D., ...
We report on systematic study of superconducting characteristics and Pr crystalline-electric-field (CEF) levels of filled-skutterudite \pra ($T_{\rm c}$ = 2.33 K). The temperature dependences of the...
Pressure-temperature phase diagram of the heavy-electron superconductor URu2Si2 (2006)
Amitsuka, H., Matsuda, K., Kawasaki, I., Tenya, K., Yokoyama, M., Sekine, C., ...
The pressure-temperature phase diagram of the heavy-electron superconductor URu2Si2 has been reinvestigated by ac-susceptibility and elastic neutron-scattering (NS) measurements performed on a small...
Hachitani, K., Fukazawa, H., Kohori, Y., Watanabe, I., Sekine, C., Shirotani, I.
Muon spin relaxation measurements on the filled skutterudite compound SmRu4P12 have been carried out in zero- and longitudinal-fields. Temperature dependence of both initial asymmetry and muon-spin...
Matsunami, M., Chen, L., Takimoto, M., Okamura, H., Nanba, T., Sekine, C., ...
Electronic structures of the filled-skutterudite compounds PrRu$_4$P$_{12}$ and SmRu$_4$P$_{12}$, which undergo a metal-insulator transition (MIT) at $T_{\rm MI}$ = 60 K and 16 K, respectively, have...
Charge-Density-Wave Ordering in the Metal-Insulator Transition Compound PrRu4P12 (2004)
Lee, C. H., Matsuhata, H., Yamaguchi, H., Sekine, C., Kihou, K., Suzuki, T., ...
X-ray and electron diffraction measurements on the metal-insulator (M-I) transition compound PrRu$_4$P$_{12}$ have revealed the emergence of a periodic ordering of charge density around the Pr atoms....
Single Crystal Growth of Skutterudite CoP3 under High Pressure (2003)
Lee, C. H., Kito, H., Ihara, H., Akita, K., Yanase, N., Sekine, C., ...
A new method to grow single crystals of skutterudite compounds is examined. Using a wedge-type, cubic-anvil, high-pressure apparatus, single crystals of CoP3 were grown from stoichiometric melts...
Magnetic properties of Ce(Rh1-xRux)2Si2 single crystals for x up to 0.5 (2003)
Haen, P., Lapierre, F., Lejay, P., Jaworska-Golab, T., Sekine, C., De Brion, S.
Magnetic phase diagram of filled skutterudite SmRu4P12 (2003)
Sekine, C., Shirotani, I., Marsuhara, K., Haen, P., De Brion, S., Chouteau, G., ...
Possible Kondo resonance in PrFe4P12 studied by bulk-sensitive photoemission (2002)
Yamasaki, A., Imada, S., Nanba, T., Sekiyama, A., Sugawara, H., Sato, H., ...
Pr 4f electronic states in Pr-based filled skutterudites PrT4X12(T=Fe and Ru; X=P and Sb) have been studied by high-resolution bulk-sensitive Pr 3d-4f resonance photoemission. A very strong spectral...
Structural Phase Transition Accompanied by Metal - Insulator Transition in PrRu4P12 (2000)
Lee, C. H., Matsuhata, H., Yamamoto, A., Ohta, T., Takazawa, H., Ueno, K., ...
A structural phase transition has been found using electron diffraction technique in PrRu4P12 accompanied by a metal - insulator (M - I) transition (TMI = 60K). Weak superlattice spots appeared at...
XANES study of rare-earth valency in LRu4P12 (L = Ce and Pr) (2000)
Lee, C. H., Oyanagi, H., Sekine, C., Shirotani, I., Ishii, M.
Valency of Ce and Pr in LRu4P12 (L = Ce and Pr) was studied by L2,3-edge x-ray absorption near-edge structure (XANES) spectroscopy. The Ce-L3 XANES spectrum suggests that Ce is mainly trivalent, but...
Iki, K., Suenaga, K., Uwatoko, Y., Oomi, G., Sekine, C.
Thermal expansion of URu2Si2 and CeRu2Si2 has been measured under high pressure 20kbar; the contribution of crystal electric field splitting to thermal expansion of both compounds tends to disappear...
Suzuki, Y., Aoyagi, Y., Muramatsu, M., Sekine, C., Isemura, M., Ichida, F.
Monoclonal antibodies 18H4 and 19F12 against alpha-foetoprotein (AFP) were examined by enzyme immunoassay for binding to two forms of AFP that were separated on the basis of the reactivity with...
Sekine, C., Aoyagi, Y., Suzuki, Y., Ichida, F.
The reactivity of alpha-1-antitrypsin (AAT) with Lens culinaris agglutinin (LCA) was studied by crossed immuno-affinity electrophoresis of the sera of 246 subjects from 6 groups (acute virus...