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Hysteretic magneto-resistance of point contacts formed between non-magnetic tips and single ferromagnetic films exchange-pinned by antiferromagnetic films is investigated. The analysis of the measured current driven and field driven hysteresis agrees with the recently proposed model of the surface spin-valve, where the spin orientation at the interface can be different from that in the bulk of the...
In this study, spin-transfer induced magnetization dynamics in exchange-biased spin-valves, for both polarities of current and field are studied. The structure of the samples included a synthetic pinned layer and a soft free layer, patterned into square pillars with a lateral size of the order of 100 nm. The resistance of the pillars was of the order of 5Omega, and the measured giant magnetoresistance...
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