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Electrical, magnetic and thermal properties of the δ-FeZn10 complex intermetallic phase


Jazbec, S.; Koželj, P.; Vrtnik, S.; Jagličić, Z.; Popčević, Petar; Ivkov, Jovica; Stanić, Denis; Smontara, Ana; Feuerbacher, M.; Dolinšek, J.
Electrical, magnetic and thermal properties of the δ-FeZn10 complex intermetallic phase // Physical Review B - Condensed Matter and Materials Physics, 86 (2012), 064205-1 doi:10.1103/PhysRevB.86.064205 (međunarodna recenzija, članak, znanstveni)


Naslov
Electrical, magnetic and thermal properties of the δ-FeZn10 complex intermetallic phase

Autori
Jazbec, S. ; Koželj, P. ; Vrtnik, S. ; Jagličić, Z. ; Popčević, Petar ; Ivkov, Jovica ; Stanić, Denis ; Smontara, Ana ; Feuerbacher, M. ; Dolinšek, J.

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 86 (2012); 064205-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
PACS numbers: 72.15.Eb; 75.47.Np; 65.40.Ba

Sažetak
We report the electrical, magnetic and thermal properties of the δ-FeZn10 phase in the zinc-rich domain of the Fe–Zn system. The δ-FeZn10 phase possesses high structural complexity typical of complex metallic alloys: a giant unit cell comprising 556 atoms, polyhedral atomic order with icosahedrally-coordinated environments, fractionally occupied lattice sites and statistically disordered atomic clusters that introduce intrinsic disorder into the structure. Structural disorder results in suppression of the electrical and heat transport phenomena, making δ-FeZn10 poor electrical and thermal conductor. Structural complexity results in a complex electronic structure that is reflected in the opposite signs of the thermoelectric power and the Hall coefficient. The δ-FeZn10 phase is paramagnetic down to the lowest investigated temperature of 2 K with a significant interspin coupling of antiferromagnetic type. Specific heat indicates the formation of short-range-ordered spin clusters at low temperatures, very likely a precursor of a phase transition to a collective magnetic state that would take place below 2 K. The magnetoresistance of δ-FeZn10 is sizeable, amounting to 1.5 % at 2 K in 9 T field. The electrical resistivity exhibits a maximum at about 220 K and its temperature dependence could be explained by the theory of slow charge carriers, applicable to metallic systems with weak dispersion of the electronic bands, where the electron motion changes from ballistic to diffusive upon heating.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0352826-2848 - Transport topline i naboja u jako frustriranim magnetima i srodnim materijalima (Ana Smontara, )
286-0000000-3212 - Radioaktivnost u okolišu, detekcija i primjena (Josip Planinić, )

Ustanove
Institut za fiziku, Zagreb,
Sveučilište u Osijeku - Odjel za fiziku

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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