Concentration dependence of the exchange interaction in Pb 1 − x Eu x Te

摘要: From low-field measurements of the susceptibility at temperatures up to 385 K, fitted Curie-Weiss expression, exchange constant J/${\mathrm{k}}_{\mathrm{B}}$ ${\mathrm{Pb}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{Eu}}_{\mathrm{x}}$Te has been obtained for different values x. It observed that decreases with increasing Reasons this decrease are proposed. Measurements low-temperature magnetization fields 23 T yield a value pair ${\mathrm{J}}_{\mathrm{p}}$/${\mathrm{k}}_{\mathrm{B}}$, which is somewhat larger than from and nearly independent This result seems be due clustering Eu atoms.