Effect of randomness on anomalous Hall coefficient in antiferromagnet U2PdGa3

• Autorzy: Tran V H
• Języki publikacji: EN

Abstrakty

EN

The Hall effect has been studied for antiferromagnet U2PdGa3. In the paramagnetic state, the Hall data can be interpreted in terms of skew scattering theory for heavy-fermion systems. We observe a large contribution of anomalous Hall coefficient, indicating a dominated contribution of incoherent skew scattering by uranium 5f moments. Interesting behaviour of the RH(T) dependence is found at low temperatures. The RH(T) curve displays a plateau between T* = 12 and TN = 33 K, followed by a shoulder with further decreasing temperature. The appearance of the anomaly around T* suggests the existence of a new scattering mechanism, in addition to well known skew and jump-side scatterings. We compare the Hall data of U2PdGa3 with those observed for strongly correlated electron systems and with those of spin-glasses. Like the latter systems, non-zero spin chirality seems to play a considerable role in the anomalous Hall effect of U2PdGa3.

Słowa kluczowe

EN

U2PdGa3; Hall effect; strongly correlated electron systems; randomness; spin chirality

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2008
• Tom: Vol. 26, No. 4
• Strony: 1069--1075
• Opis fizyczny: Bibliogr. 12 poz., wykr.

Twórcy

autor

Tran V H

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wrocław, P. O. Box 1014, Poland

Bibliografia

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