ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have extended the stable amorphous phase of the Co1−xZrx system to 7〈x〈52 by compositionally modulating very thin (five to ten atomic layers) layers of Co and Zr by rf diode sequential sputtering from the elemental targets onto rotating, water cooled substrates. This extension was attributed to a stable, two-phase, hetero-amorphous state similar to that previously reported for Co/B layered structures (Ref. 1). The measured compositional variation of Ms of our Co/Zr layered structures indicated that, as expected, the composition of the stable Co-rich clusters in the heterogeneous state lies near the stable Co-rich eutectic of the CoZr system. The composition variation of the coercivity of the as-deposited Co/Zr structures was remarkably low (〈1 Oe) over the entire composition range. The uniaxial anisotropies of 15–30 Oe were reduced to ≈2 Oe by a combination of bias sputtering and rotating field annealing. Although they have reduced Ms, the permeabilities of the Zr-rich films are (approximately-greater-than)1200, and constant (to 10%) to ≈50 MHz. They also have high resistivities (≈190 μΩ cm), potentially increased hardness and stability, and could be useful for magnetic recording head applications.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.348032
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