2002
DOI: 10.1063/1.1447870
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Abstract: We report the observation of exchange bias in (Pt/Co0.90Fe0.10)n/FeMn multilayers, with perpendicular magnetic anisotropy. We analyze the behavior of the exchange-bias field Heb as a function of temperature, FeMn thickness, number of (Pt/Co0.90Fe0.10) bilayers, and annealing conditions. Measurements carried out with field applied perpendicular to the plane of the samples indicate that the hysteresis loops present 100% of remanent magnetization, with Heb reaching 200 Oe and a tunable coercive field, depending o… Show more

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Cited by 70 publications
(41 citation statements)
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“…A similar reduction of the perpendicular magnetic anisotropy has also been found for CoFe/ Pt multilayers with an FeMn film on top. 9 Figure 5 summarizes the effective magnetic anisotropy for different Co/ Pt bilayer repetitions.…”
Section: Resultsmentioning
confidence: 99%
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“…A similar reduction of the perpendicular magnetic anisotropy has also been found for CoFe/ Pt multilayers with an FeMn film on top. 9 Figure 5 summarizes the effective magnetic anisotropy for different Co/ Pt bilayer repetitions.…”
Section: Resultsmentioning
confidence: 99%
“…[17][18][19][20][21][22] Although rather small, the perpendicular interfacial exchange energies for the Co/ Pt-IrMn system are comparable to those measured on similar CoFe/ Pt and Co/ Pt multilayers with an AFM FeMn film on top. 9 To determine the effects of field annealing on the perpendicular magnetic anisotropy of exchange-biased Co/ Pt multilayers we measured the EHE voltage with an in-plane FIG. 1.…”
Section: Resultsmentioning
confidence: 99%
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“…No coercivity enhancement has been observed. A similar lack of coercivity enhancement in exchange-coupled systems has been seen in (Pt/Co 0.9 Fe 0.1 )n/FeMn multilayers with perpendicular anisotropy 4 and in FeNi/FeMn bilayers 14 for FeMn thicknesses above 100 Å, and has been ascribed to the pinning of AF spins due to the AF anisotropy.…”
Section: Methodsmentioning
confidence: 63%
“…Recently, exchange coupling has been found in FM/AF systems with a ferromagnetic out-of-plane easy axis. [3][4][5][6] Pt/Co or Pt/CoFe multilayers are used as the FM layer with out-of-plane anisotropy. In Co/Pt multilayers exchange-biased with naturally oxidized thin CoO ͑10 Å͒, 3 a model has been proposed to show that out-of-plane AF spin components are necessary to obtain out-of-plane exchange coupling.…”
Section: Introductionmentioning
confidence: 99%