Naslov
Hall effect and electronic structure of transition metal based metallic glasses

Autori
Babić, Emil

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Symposium in memory of Jovica Ivkov / Popčević, Petar ; Smontara, Ana - Zagreb : Institut za fiziku, 2017, 5-5

ISBN
978-953-7666-15-6

Skup
Symposium in memory of Jovica Ivkov

Mjesto i datum
Zagreb, Hrvatska, 24.02.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Hall effect, metallic glasses

Sažetak
The intimate relationship of the Hall coefficient, RH, with the electronic band structure (EBS) and the dynamical properties of electrons in solids is particularly important in amorphous alloys, where most of the direct methods for the determination of the EBS are not applicable. Because of this, the results of the lifelong study of RH in amorphous alloys (including thin films) by Dr. J. Ivkov, are one of the most important, permanent achievements from the over 40-year long extensive investigations of these systems in Zagreb. I will try to illustrate this by showing the correlations between RH and the EBS in two most important types of metallic glasses (MG): late transition metal-metalloid (TL-M) and the early transition metal-late transition metal (TE-TE) MGs. In the former case (Ni-base MGs) Ivkov obtained accurate numbers of the conduction electrons per atom, na , over a broad composition range which enabled him to deduce changes in the EBS with the content and type of M[1]. He could also show that the Ziman- Faber theory can explain the transport properties of these MGs. Similarly, Ivkov was the first to demonstrate the correlation between the split- band EBS and the change of sign of RH (Fig. 1) in TE-Tl MGs[2] . He also provided some evidence for the connection between positive values of RH and the spin-orbit interaction in these alloys. Equally important was his study of anomalous Hall effect and the EBS in ferromagnetic TL-M MGs [3]. Fig.1. Hall coefficients of Cu-Ti, Zr, Hf alloys. [1] J. Ivkov, E. Babic, J. Phys. F: Met. Phys. 15, L161 (1985) ; J. Ivkov , E. Babic, H. H. Liebermann, J. Phys.:Cond. Mat. 2, 8591 (1990) [2] J. Ivkov, E. Babic, R. L. Jacobs, J. Phys. F: Met. Phys. 14, L53 (1984) ; J. Ivkov, E. Babic, J. Phys.: Cond. Mat.2. 3891 (1990) [3] J. Ivkov, Ž. Marohnić, P. Dubček, E. Babić, J. Phys. F: Met. Phys. 14, 3023 (1984)

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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