Abstract
A large Hall effect was observed in Fe–XCr–10Co (wt%) granular alloy films at room temperature. After aging, phase separation into α1 (ferromagnetic) and α2 (paramagnetic) phases was observed and verified using a high-resolution transmission electron microscope (HRTEM). The alloy composition and heat treatment conditions, which influence a film's microstructure, obviously affect the Hall effect. The Hall resistivity is positive for both as-deposited and annealed films. After aging the Fe–10Cr–10Co films at 200°C for 60 min, we observed the maximum Hall resistivity (ρH) of 12.6 µ Ω·cm (measured at 300 K and 14 kOe). The Hall resistivity varies almost linearly with the applied field.
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