Effect of annealing on magnetic and structural properties of Co/Re superlattices : 37th Annual conference on magnetism and magnetic materials
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1089-7550
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
We have studied the effect of annealing on the magnetic and structural properties of sputtered Si/Re50 A(ring) [Co20 A(ring)/RexA(ring)]40 superlattices with xRe=3,5,7,10 A(ring). Annealing the samples for 1 h at 300 °C causes a slight increase in interfacial mixing and a contraction of lattice spacing d(002) owing to interdiffusion and structural relaxation, as indicated by the x-ray diffraction data. In addition, the subsequent room-temperature magnetoresistance (MR) increases for samples with antiferromagnetic (AF) coupling, by up to 20% for xRe=5 A(ring), providing strong experimental evidence for the spin-dependent scattering mechanism which predicts an increasing MR with increasing diffuse interface scattering. A further 1 h anneal at 525 °C provokes dramatic interdiffusion between the Co and Re layers, which is accompanied by a considerable decrease of the MR, indicating a disappearance of the interlayer AF coupling.
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| Type of Medium: |
Electronic Resource
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| URL: |