Magnetization reversal in NiFe/NiMn bilayers was studied by measuring anisotropic magnetoresistance and pseudo-Hall effect simultaneously. Since the single domain state of the ferromagnetic layer could be well traced in such measurements, we were able to distinguish hysteresis of exchange bias from inhomogeneous magnetization. The exchange bias was found to have two components during the single domain reversal process. Domain breaking in given fields took place when the biasing field became more random.
Abstract. In the present solar minimum, corotating interaction regions (CIRs) produce frequent particle enhancements at 1 AU as observed at STEREO and ACE. As the two STEREO spacecraft move apart, differences in CIR time profiles observed at each spacecraft are becoming large. The timing differences are often roughly similar to the corotation time lag between the two spacecraft, however many of the features seen at Ahead and Behind reqinre more than just a time shift. Perhaps transient disturbances in the solar wind affect connection to or transport from the shock, or temporal changes occur in the CIR shock itself. Additional timing differences of >1 day result from the different heliographic latitudes of the two STEREO spacecraft.
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