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Magnetic properties of the Hf-base metallic glasses


Ristić, Ramir; Pajić, Damir; Zadro, Krešo; Babić, Emil; Marohnić, Željko; Drobac Đuro
Magnetic properties of the Hf-base metallic glasses // Condensed Matter Physics Conference of Balkan Countries
Mugla: Mugla University, 2008. str. 120-120 (poster, međunarodna recenzija, sažetak, znanstveni)


Naslov
Magnetic properties of the Hf-base metallic glasses

Autori
Ristić, Ramir ; Pajić, Damir ; Zadro, Krešo ; Babić, Emil ; Marohnić, Željko ; Drobac Đuro

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

Izvornik
Condensed Matter Physics Conference of Balkan Countries / - Mugla : Mugla University, 2008, 120-120

Skup
Condensed Matter Physics Conference of Balkan Countries

Mjesto i datum
Mugla, Turska, 26-28.05.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Magnetic properties; Metallic glasses; Hf

Sažetak
Recent discovery of Hf-Cu base bulk metallic glasses [1] increased the interest in amorphous alloys consisting of the early and late transition metals. Here, we report new results for the magnetic properties of Hf100-xFex metallic glasses in the concentration range (20 ≤ x ≤ 43) below the onset of long range ferromagnetic order, xc ≈ 50 [2]. We have measured magnetization and ac susceptibility of Hf100-xFex (x = 20, 25, 40 and 43) glassy alloys in the temperature range 1.5K to 300K and magnetic field up to 5.5T. The magnetic susceptibility χ exp increases rapidly with x, which is due to presence of Fe 3d states at EF and the onset of magnetic correlations in the vicinity of transition into the ferromagnetic state, xc ≈ 50. The onset of correlations shows up in the Curie-Weiss term in χ exp for x = 25 and superparamagnetism for x = 40 and 43 (with blocking temperatures rapidly increasing with x). Thus, the formation of magnetic clusters inside the paramagnetic matrix precedes the formation of ferromagnetic state in Hf-Fe metallic glasses [3]. The results are compared with those for similar Zr-base glassy alloys. [1] A.Inoue, W.Zhang, T.Zhang and K.Kurosaka, Acta Materialia, 49 (2001) 2645 ; [2] S.H. Liou, G.Xiao, J.N. Taylor and C.L. Chien, Journal of Applied Physics, 57 (1985) 3535 ; [3] D. Pajić, K. Zadro, R. Ristić, I. Živković, Ž. Skoko and E. Babić, Journal of Physics: Condensed Matter, 19 (2007) 296207.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0352843-2845 - Kvantni magneti: Osnovna stanja u kompeticiji (Mladen Prester, )
119-1191458-1017 - Nanomagneti (Krešo Zadro, )
119-1191458-1019 - Elektromagnetska svojstva nanostrukturiranih materijala (Emil Babić, )

Ustanove
Institut za fiziku, Zagreb,
Prirodoslovno-matematički fakultet, Zagreb