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

Dinesh Martien; Kentaro Takano; A. E. Berkowitz; David Smith

doi:10.1063/1.123535

Increasing the exchange-bias field of Ni_0.5Co_0.5O films by microstructural control

Dinesh Martien, Kentaro Takano, A. E. Berkowitz, David Smith

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The exchange-bias field produced by antiferromagnetic monoxide films has been shown to scale with the density of uncompensated interfacial spins. The uncompensated spin density is inversely proportional to the interfacial grain diameter. Accordingly, we have prepared Ni_0.5Co_0.5O films in which the average interfacial grain diameter is small, but the grains are elongated, thus avoiding thermally activated fluctuations of the spin system associated with small grain volumes. The exchange-bias field remained inversely proportional to the interfacial grain diameter, and was increased to twice its previous maximum value without introducing significant thermal instability.

Original language	English (US)
Pages (from-to)	1314-1316
Number of pages	3
Journal	Applied Physics Letters
Volume	74
Issue number	9
DOIs	https://doi.org/10.1063/1.123535
State	Published - Mar 1 1999

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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

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AU - Martien, Dinesh

AU - Takano, Kentaro

AU - Berkowitz, A. E.

AU - Smith, David

PY - 1999/3/1

Y1 - 1999/3/1

N2 - The exchange-bias field produced by antiferromagnetic monoxide films has been shown to scale with the density of uncompensated interfacial spins. The uncompensated spin density is inversely proportional to the interfacial grain diameter. Accordingly, we have prepared Ni0.5Co0.5O films in which the average interfacial grain diameter is small, but the grains are elongated, thus avoiding thermally activated fluctuations of the spin system associated with small grain volumes. The exchange-bias field remained inversely proportional to the interfacial grain diameter, and was increased to twice its previous maximum value without introducing significant thermal instability.

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

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Increasing the exchange-bias field of Ni_0.5Co_0.5O films by microstructural control

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