Volume 67, Number 1, July 2004
|Page(s)||123 - 129|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 June 2004|
Chiral susceptibility in canonical spin glass and re-entrant alloys from Hall effect measurements
Instituto de Física, Universidade Federal do Rio Grande do Sul Caixa Postal 15051, 91501-970 Porto Alegre, RS, Brazil
2 Laboratoire des Verres, Université Montpellier II 34095 Montpellier, France
Accepted: 29 April 2004
The extraordinary Hall effect coefficients of the canonical spin glass alloys and and of an archetype re-entrant system were measured as functions of temperature. The data show a critical cusp-like term superimposed on a smooth background for the spin glasses, and change of sign with temperature for the re-entrant. The results can be interpreted consistently by invoking a chiral Hall effect contribution as proposed by Kawamura.
PACS: 75.50.Lk – Spin glasses and other random magnets / 75.47.-m – Magnetotransport phenomena; materials for magnetotransport / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)
© EDP Sciences, 2004
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