Electronic structure of hydrogenated amorphous NiZr alloys

Transport properties of hydrogen‐doped (Zr803d20)1−xHx (3d = Co, Ni) metallic glasses

“…The values of the density of states at Fermi level, N(E F ), derived from the relation, N(E F ) = (e 2 ρD) -1 , are given in Table 2. Hydrogen reduces the d-density of states at the Fermi-level in Zr-3d metallic glasses, which is consistent with the ultra-violet photoelectron spectroscopy measurements [16] as well as the magnetic susceptibility results [17] and specific heat measurements [15]. Thus we conclude that the resistivity increase of (Zr 80 3d 20 ) 1-x H x (3d = Co, Ni), (Table 1), is partly caused by the decrease of the density of d-states at the Fermi level, N(E F ), and partly by the observed decrease of the electron diffusion constant, D, ( Table 1).…”

Structure property relationship in (TiZrNbCu)1−xNix metallic glasses

“…The results of PES in a-HEA region are illustrated in Figure 4 and compared with those for binary and ternary Zr-based MGs [67]. The Figure 4, it is evident that the low-energy part of the spectrum has contributions from Ni-3d and Zr-4d bands [67]. It appears that most of the spectral intensity between 1 eV and 2 eV below EF comes from the DoS associated with Ni-3d bands [68,69].…”

“…Accordingly, we performed combined PES [22,66] and LTSH [18,36] studies of a-(TiZrNbCu)1-xNix alloys with x covering both HEA and regions with higher Ni content. The results of PES in a-HEA region are illustrated in Figure 4 and compared with those for binary and ternary Zr-based MGs [67]. The Figure 4, it is evident that the low-energy part of the spectrum has contributions from Ni-3d and Zr-4d bands [67].…”

“…The Ni contribution to the intensity at the Fermi level is not negligible and is likely to increase at high Ni-content [70]. The Zr-4d band is expected to contribute to the DoS mainly at the Fermi level [71] as is the Ti-3d band, as judged from the spectrum from pure Ti [72] and an amorphous (Ni0.33Zr0.67)0.85Ti0.15 alloy [67]. The Nb-4d band contributes to the spectral intensity at the Fermi level and around 1.2 eV [73] but possibly to a lesser extent than Ni [74].…”

“…The spectral maximum at 3.5 eV below the Fermi level, associated with the Cu-3d states, is well resolved and separated from the low-energy part of the spectrum. From the UPS spectra of (TiZrNbCu)0.8 Ni0.2 (blue dots,[66]) and for comparison, of (Ni0.33 Zr0.67)0.85 Cu0.15 and Ni0.33 Zr0.67 from ref [67][67], shown in the lower part of…”