Norihito Suzuki

Electronic States of the Antiferromagnet UGa3

We have grown a single crystal with the residual resistivity ratio of 81, and studied its electronic properties of the cubic antiferromagnetic compound UGa 3 . From the transverse magnetoresistance...

Interplay between magnetism and superconductivity in URu2Si2 studied by neutron scattering experiments

Neutron scattering experiments have been carried out for a heavy fermion superconductor URu 2 Si 2 . We found that the (1 0 0) magnetic Bragg peak intensity is reduced by 1–2% in magnitude below the superconducting transition temperature of 1.15 K. This is direct evidence of the interplay between magnetism and superconductivity in URu 2 Si 2 .

de Haas-van Alphen Oscillations and magnetic Properties of YbPb3 and EuPb3

We observed the de Haas-van Alphen oscillations of a Pauli paramagnetic compound YbPb 3 and an antiferromagnetic compound EuPb 3 . Detected Fermi surfaces in YbPb 3 are three in number, which are well explained by the FLAPW band calculations. The cyclotron effective masses are in the range from 0.21 to 0.60 m 0 . The paramagnetic and antiferromagnetic Fermi surfaces were detected in EuPb 3 . The former Fermi surface is the same as in YbPb 3 , which is seen by magnetic breakdown. EuPb 3 is a divalent compound whose magnetic properties were studied by the specific heat, magnetic susceptibility and high-field magnetization experiments.

Photoelectric pulse interval distribution of gaussian-lorentzian light

Abstract The time interval distribution of two successive photoelectric pulses depends not only upon the spectral linewidth but also on the correlation factor. The distribution is derived in the case of gaussian-lorentzian light under the condition of a markovian process and is also applied to the analysis of the counting loss of a circuit with dead time, from which information on the spectral linewidth is obtained. The theoretical counting loss is compared with the experimental one.

Fermi surfaces of RIn3 (R=Tb, Dy, Ho, Er, Tm, Yb and Lu)

Abstract We observed the de Haas–van Alphen (dHvA) oscillations in RIn3 (R=Tb, Dy, Ho, Er, Tm Yb and Lu). The Fermi surfaces in each RIn3 are compared to the results of FLAPW band calculations.

RKKY interaction in intercalation compounds of transition-metal dichalcogenides

Abstract Exchange couplings due to the RKKY interaction are calculated for intercalation compounds M x NbS 2 and M x TiS 2 (M = transition metal) by using the realistic band structures of the mother crystals. The results are discussed in connection with the magnetic orderings observed in these intercalation compounds.

Statistics of photoelectric pulses for Gaussian-Lorentzian light

The practical treatment of statistics for Gaussian-Lorentzian light is studied theoretically and experimentally by using the time interval distribution of photoelectric pulses, which is derived in two approaches that are based on Markovian processes and the generating function of photon counting statistics, taking the experimental conditions into account. The limits of the validity of the Markovian assumption are made clear. In arbitrary light intensity it is valid experimentally to employ the practical generating function of photon counting distribution expressed as the product of an ideal generating function and a Poissonian one.

The spectral profile of light scattered by particles in electrophoretic movement

Abstract The electrophoretic movements of polystyrene latex particles suspended in water and in electrolyte solutions have been investigated with an optical beating technique. When two kinds of particles in water move in the presence of an external electric field, it is observed that the laser light scattered by these particles exhibits a shifted spectrum with a single peak profile, even if the electrophoretic mobilities of the two kinds of particles are different to each other. However, when these particles are suspended in an electrolyte solution, two separate spectral lines are observed which correspond to the velocity of each kind of particles.

Electronic structure and magnetism of transition-metal mononitrides

Abstract We perform systematically FLAPW band calculations for transition-metal mononitrides MN (M ue5fb Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu). The equilibruim lattice constants are determined from the total energy calculations and the results are compared with the existing experimental data. We calculate also the hyperfine field at the Fe site in NaCl-type FeN, and effects of the defects of N atoms on the hyperfine field are discussed.

Electrical and Thermal Properties of UB2

We have measured the electrical resistivity, thermoelectric power, magnetic susceptibility, magnetoresistance and specific heat of a Pauli paramagnetic compound UB 2 . The magnetoresistance shows a...