Increasing the exchange-bias field of Ni0.5Co0.5O films by microstructural control

作者: Dinesh Martien , Kentaro Takano , A. E. Berkowitz , David J. Smith

DOI: 10.1063/1.123535

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摘要: The exchange-bias field produced by antiferromagnetic monoxide films has been shown to scale with the density of uncompensated interfacial spins. spin is inversely proportional grain diameter. Accordingly, we have prepared Ni0.5Co0.5O in which average diameter small, but grains are elongated, thus avoiding thermally activated fluctuations system associated small volumes. remained diameter, and was increased twice its previous maximum value without introducing significant thermal instability.

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