High-frequency characteristics of CoFeVAlONb thin films

Lee, K.E.; Ha, N.D.; Phan, Manh‐Huong; Kim, C.O.

doi:10.1016/j.jmmm.2006.01.157

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“…However, the permeability spectrum curve of the Co/FeMn bilayer film shows a resonance peak at 3 GHz as shown in figure 5(b). It is known that for thin film with uniaxial in-plane anisotropy, the Landau-Lifshitz equation [21] can be simplified to…”

Section: Resultsmentioning

confidence: 99%

In-plane anisotropy formation of Co thin film induced by FeMn covering layer

Jiang¹,

Xue²,

Fan³

et al. 2008

J. Phys. D: Appl. Phys.

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A Co (40 nm) thin film and a Co (40 nm)/Fe50Mn50(15 nm) bilayer are fabricated by radio frequency magnetron sputtering on a Si substrate. It is found that the Fe50Mn50 covering layer results in a decrease in the coercivity of the Co thin film. After high-vacuum magnetic heat treatments at 240 and 300 °C, a significant uniaxial anisotropy is induced only in the bilayer. A resonance peak at 3 GHz of the annealed bilayer is found in the permeability spectrum. The temperature dependence of magnetic hysteresis loops shows that the uniaxial anisotropy is related to the exchange coupling between the ferromagnet and the antiferromagnet layer.

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Section: Resultsmentioning

confidence: 99%