Susumu Matsuo

Photoemission study of an Al-Cu-Fe icosahedral phase

Photoemission spectra of the Al-Cu-Fe quasicrystal with the icosahedral phase were studied at room temperature. The line shape of the overall observed spectrum is like a large peak on a plateau cut-off at EF. The large peak observed at about 4 eV below EF seems to originate mainly from the 3d state of Cu atoms. The bump was observed at about 1 eV below EF. The high resolution experiment showed an anomalous valley at EF in the electronic density of states. This means that the dip at EF in the DOS has a half-width 0.3-0.4 eV and that its depth is 70% of the value for a no-dip case.

Superconducting transition temperature of aluminum, indium, and lead fine particles

AbstractAluminum, indium, and lead fine particles with free surfaces were made by evaporation in helium gas to study the size dependence of the superconducting transition temperatureTc in very small particles. The transition temperature was determined from the change of diamagnetic susceptibility with temperature. The present experiment shows thatTc rises with decrease of the average diameter

Magnetic Properties of a New Magnetic Phase in Fine bcc Chromium Particles Prepared by Gas Evaporation Method

\bar d

Anisotropic Magnetic Property of Single-Grained Al68Pd23Mn9 Icosahedral Quasicrystals

for aluminum and indium, while it remains nearly constant for lead. The enhancement factorsTc/Tcb (Tcb isTc for the bulk material) in the case of

High-temperature magnetic properties of a stable Al65Cu20Fe15 icosahedral phase

\bar d = 100 {\AA}

Quasiperiodic long-range ferrimagnetic order in Ising model simulation in an icosahedral quasicrystal model structure

are determined as 1.45, 1.15, and 1.0 for aluminum, indium, and lead, respectively. The effect of the soft phonon mode arising from the increasing fraction of surface satisfactorily explains the experiment with respect to both the size dependence and the difference among elements by a rather simple model.