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- Title
Localization of conduction electrons in the ferromagnetic clusters AuFe.
- Authors
Prokhorov, A. S.; Zhukova, E. S.; Gorshunov, B. P.; Hesselberth, M. B. S.; Aarts, J.; Nieuwenhuys, G. J.; Kaiser, S.; Dressel, M.
- Abstract
The optical-conductivity spectra of concentrated solutions Au1 − xFe x with x = 17 and 22 at % have been measured in a frequency range of (10–33) × 103 cm−1 at room temperature. The results are analyzed together with previous optical data obtained for compounds with x = 4–12 at %. It is found that the magnetic contributions σmagn = σAuFe − σAu to dc and low-frequency(10 cm−1) conductivities for an Fe concentration below 4 at % are almost equal, while the low-frequency magnetic contribution for larger concentrations is significantly larger than the dc one. An absorption band at frequencies of 1000–3000 cm−1 has been found for samples with concentrations x = 6–22 at %. The observed phenomena are attributed to the localization of electrons inside clusters containing ferromagnetically ordered iron ions.
- Subjects
LOCALIZATION theory; CONDUCTION electrons; FERROMAGNETISM; IRON ions; OPTICS
- Publication
JETP Letters, 2009, Vol 89, Issue 9, p466
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364009090094