Spezifische Wärmen von HoCl3 · 6H2O und ErCl3 · 6H2O im Temperaturbereich zwischen 1,2 °K und 230 °K

Zeitschrift für Physik A Hadrons and nuclei - Die spezifischen Wärmenc Ho undc Er von HoCl3 · 6 H2O und ErCl3 · 6 H2O werden im Temperaturbereich zwischen 1,2 ΩK und 230...     

Electrical conductivity of slightly reduced rutile between 2° and 370°K

Abstract

The electrical resistivity and the Hall coefficient of slightly reduced rutile crystals were measured in the temperature range between about 2 °K and 370 °K. The time of reduction treatments between 900 °C and 1300 °C was usually as long as 300 hrs, which assures the homogeneous reduction of crystals, The conduction mechanisms in three temperature ranges, i. e. 1. 9～3°K, 3～100°K and 100～250°K, were discussed in terms of lattice defects evidenced by ESR studies.     

The 220°K defect in electron irradiated p-Type Germanium

Lattice defects introduced in p-type nondegenerate germanium by 1.5 MeV electron irradiation at liquid nitrogen temperature was investigated by means of electrical resistivity and Hall coefficient measurements. The annealing behavior of two kinds of defects, which anneal at about 220 °K, was investigated in detail. Each of them has an electron trap. Making use of trap-filling and emptying processes, the 220 °K defects are separated from other defects.     

A detailed model for the conductivity of magnetite below 119°K

The question of charge transport through the Fe₃O₄ lattice in the ordered state is reexamined. It is shown that only a fairly complicated defect can transfer charge. The implications of this model are compared with the experimental data.     

Über Magnetisierung und Feld stabförmiger Körper

The scintillation response of anthracene crystals to positrons and electrons is investigated in the energy region below 200 kev and is found to be linear within experimental error, with an intercept on the energy axis of a few kev, depending on size and surface conditions of the crystal. The light yield of positrons might be slightly below that of electrons, but the difference is less than about 2%.