Zeeman Effect and Dilution Effect of Absorption Lines in GCrSH

Abstract

Zeeman effect of the R and B lines in GCrSH was measured. No difference was observed between the Zeeman patterns of the R₁ and R₂ absorption lines. Non-zero g-values of the excited states were obtained from the patterns in a magnetic field perpendicular to the trigonal axis. From these results, it is concluded that these two lines are not attributed to the two transitions ⁴A₂→\barE(²E) and ⁴A₂→2\barA(²E) of a Cr³⁺ ion, but to the transition ⁴A₂→\barE(²E) in the two different Cr³⁺ sites. Both the B₁ and the B₁′ lines were assigned to ⁴A₂→\barE_b(²T₂) from the Zeeman patterns in a high pulsed magnetic field.
New lines were found in the R-line region when GCrSH was diluted by aluminum. They are considered to originate from certain kinds of Cr³⁺ sites and to have relation with the ferroelectric character of the crystals. In the B-line region, however, no new lines were observed.