Multiple state luminescence for the d⁴ OsCl₆^2- impurity ion in K₂PtCl₆ and Cs₂ZrCl₆ cubic crystals

Abstract

Strong sharp-line luminescence has been observed for Os⁴⁺(5d⁴) as an impurity in single cubic crystals of Cs₂ZrCl₆ and K₂PtCl₆ at low temperatures. For Os⁴⁺ in Cs₂ZrCl₆, sharp-line luminescence within the t _2g ⁴ configuration, is observed from the Г₁(¹ A _1g ) excited electronic state at 17069 cm^-1 to the four spin-orbit components of the ³ T _1g ground electronic state at 0, 2777, 4873, and 4972 cm^-1. For Os⁴⁺ in K₂PtCl₆, a similar set of transitions is observed. Excitation of the sample was carried out by use of a krypton laser at 568·2 nm and with a xenon or mercury lamp. The detailed vibrational structure can be interpreted from a phonon density-of-states calculation.

Additional information

Notes on contributors

S.M. Khan

This work was done in partial fulfilment of the requirements for the Ph.D. Degree of S. M. Khan at the University of Maine in Physics. Present address is

Howard H. Patterson

Guest Scientist at Brookhaven National Laboratory. Research supported by NSF, DMR77-07140.

Herbert Engstrom

Research at Brookhaven supported by the Division of Basic Energy Sciences, Department of Energy, under Contract No. EY-76-C-02-0016.