New Type ofd-Band-Metal Alloys: The Valence-Band Structure of the Metallic Glasses Pd-Zr and Cu-Zr

The valence bands and core levels of the metallic glasses ${\mathrm{Pd}}_{100-x}{\mathrm{Zr}}_x$ ($65<~x<~75$) and ${\mathrm{Cu}}_{100-x}{\mathrm{Zr}}_x$ ($40<~x<~70$) and the polycrystalline pure components have been measured by ultraviolet photoelectron spectroscopy ($h\nu =21.2\mathrm{} \mathrm{and} 40.8$ eV) and x-ray photoemission spectroscopy ($h\nu =1253.6\mathrm{}$ eV). The valence-band spectra of the alloys are characterized by a large shift of the Cu and Pd $d$-band peaks to higher binding energies and a complete change of the shape of these bands to Gaussian-like peaks. This behavior is in contrast to crystalline $d$-band alloys studied to date.