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Schlagwörter:
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Zusammenfassung:
We report a study of the Hall effect of high-purity Sr3Ru2O7 single
crystals. We establish an empirical correlation between the onset of its
unusual low-temperature, high-field phase and a pronounced dip in the
field-dependent Hall coefficient. Unlike the order parameter obtained
from measurements of anisotropic resistivity, which is affected by the
formation of domains, the Hall effect feature seems to reflect the
nature of the ordering within a single domain. We checked for violations
of the Onsager relations for the off-diagonal components of the
resistivity tensor but do not detect any. We compare our observations to
those on materials that have long-wavelength spin structures, and
discuss them in relation to a growing body of theoretical work on the
nature of the low-temperature phase in Sr3Ru2O7.
