Magnetic Susceptibility and Charge State of Gd Impurity in Pb_1-xSn_xTe⟨Gd⟩ Crystals

Abstract

The effective magnetic momentum peff of Gd-impurities in the Pb1-xSnxTe(Gd) crystals as a function of crystal composition x with 0 < x < 0.25 is studied. It is shown that with the increase in tin content in the crystals from 0 to 0.15, p(Gd) increases slowly from 37 to 43.Then p2eff(Gd) increases abruptly to 63 value when x = 0.16 ± 0.01. For subsequent increase x > 0 . 1 7 p 2 e f f ( G d ) r e ma i n s c o n s t a n t a t 6 3 . P o s s i b l e r e a s o n s of observed changes of peff (Gd) and possible mechanisms of in fluence of the Pb 1 -x Snx Te crystal field on the effective magnetic momentum value of Gd -impurities in the crystals under study are analysed.

Study of the Gd Impurity Influence on the Defect Structure of Pb1-xSnxTe Crystals by Means of119Sn M�ssbauer Spectroscopy

“…In the Sn rich Pb 1--x Sn x Te crystals, the Gd impurity exists in the Gd 3+ state [14]. Therefore, it is singly charged relative to the main state of the ions of the metal sublattice, which are substituted by Gd in the crystal [13].…”