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Effect of randomness on anomalous Hall coefficient in antiferromagnet U2PdGa3

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Identyfikatory
Warianty tytułu
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.
Rocznik
Strony
1069--1075
Opis fizyczny
Bibliogr. 12 poz., wykr.
Twórcy
autor
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wrocław, P. O. Box 1014, Poland
Bibliografia
  • [1] TRAN V.H., J. Phys. Cond. Matter, 8 (1996), 6267.
  • [2] TRAN V.H.,STEGLICH F.,ANDRÉ G., Phys. Rev., 65 (2002), 134401.
  • [3] RHYNE J.J., Phys. Rev., 172 (1968), 523.
  • [4] BERGER L., BERGMANN G., [in:] The Hall Effect and Its Applications, C.L. Chien, C.R. Westgate (Eds.), Plenum, New York, 1980, p. 55.
  • [5] COLEMAN P.,ANDERSON P.W.,RAMAKRISHNAN T.V., Phys. Rev. Lett., 55 (1985), 414.
  • [6] FERT A.,LEVY P.M., Phys. Rev. B, 36 (1987), 1907.
  • [7] TRAN V.H.,TROĆR.,STĘPIEŃ-DAMM J.,KOMATSUBARA T.,STEGLICH F.,HAUSER R.,BAUER E., Phys. Rev. B, 66 (2002), 54421.
  • [8] TATARA G.,KAWAMURA H., J. Phys. Soc. Japan, 71 (2002), 2613
  • [9] TAGUCHI Y.,OOHARA Y.,NAGAOSA N.,TOKURA Y., Science, 291 (2001), 2573.
  • [10] KAGEYAMA T.,AITO N.,IIKUBO S.,SATO M.,J. Phys. Soc. Jpn., 72 (2003), 1491.
  • [11] TANIGUCHI T., YAMANAKA K., SUMIOKA H., YAMAZAKI T., TABATA Y., KAWARAZAKI S., Phys. Rev. Lett., 93 (2004), 246605.
  • [12] YAMANAKA K.,TANIGUCHI T.,YAMAZAKI T.,ASHITAKA N.,MORIMOTO Y.,TABATA Y.,KAWARAZAKI S., J. Phys. Cond. Matter, 19 (2007), 145222.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-0f57af25-fbe5-468f-9cc4-cc5f8421ddbf
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