Absence of the second-order phase transitions in the dimerized Ising chains with spin larger than 12

A general spin S Ising chain interacting with a single phonon mode of the harmonic lattice is studied. The thermodynamics of the spin system is calculated exactly for S = 1, $\text{1}\text{2}$ and $\text{3}\text{2}$, while self-consistent equations for the induced lattice distortions are derived. It is demonstrated that for S >$\text{1}\text{2}$ there is no second-order phase transition, in contrast to the case S = $\text{1}\text{2}$ which was proved to have a tricritical point. This is found to cohere with the previous studies of the dimerized magnetic model chains.     

Ein neuer Typ der laufenden Schichten in Neon

Ohne Zusammenfassung

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Coefficients for the determination of one-sided tolerance limits of normal distribution

A table of such coefficientsk is given that the interval (?∞, ¯x+ks) or (¯x?ks, +∞) covers with the probabilityP at least the ratioα of the normal population with unknown parameters.     

The susceptibility of lead telluride PbTe

The results are given of measuring the temperature dependence of the susceptibility of samples of n- and p-type PbTe, containing either an excess of one or other of the components or ions Cl^–, or Ag⁺, as impurities. The conception of cation or anion vacancies, which can be occupied by a hole or electron, Ag⁺ or Cl^– ions, was employed, in addition to the constants taken from other measurements, to explain the dependences measured.