Wavelength‐Modulated Spectra of the Optical Properties of β′‐CuxZn1−x from 1.5 to 5.1 eV at the β′ ⇄ α + β′ Phase Transition

Abstract

AbstractWavelength‐modulated derivative spectra of the reflectivity of β'‐CuxZn1‐x are determined between 1.5 and 5.1 eV for compositions near the β' ⇄ α + β' phase transition. The alloys are annealed and quenched in the β' phase on both sides of the phase transition. Both the intraband and interband properties show marked changes at the transition. The Drude effective mass increases dramatically for the β' phase in the region where α + β' composition is thermodynamically preferred, indicating flattening of the bands. Shifts in interband properties also show a marked change at the phase transition, with the conduction bands showing a much greater sensitivity than the d‐bands.