Interdiffusion and grain isolation in Co/Cr thin films

Feng, Yanhuan; Laughlin, David E.; Lambeth, D.N.

doi:10.1109/20.333953

Cited by 23 publications

(4 citation statements)

References 14 publications

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“…There are several approaches to obtain high coercivity and low noise. The most common one involves segregation of non-magnetic materials such as Cr to the grain boundaries of the Co-based alloy films [1][2][3][4][5][6][7][8] or post-deposition annealing that promotes Cr diffusing from the Cr underlayer into the CoCrPt layer [9,10]. These methods allow the CoCrPt film systems to achieve enhanced H c , and reduction of intergrain coupling and hence noise reduction [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

High coercivity CoCrPt-SiO₂granular thin films for magnetic recording

Wang

2000

J. Phys. D: Appl. Phys.

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Granular CoCrPt-SiO2 thin films with Cr underlayers have been fabricated by sputtering followed by post-deposition annealing. Microstructural and magnetic properties of as-deposited and annealed films have been investigated for potential applications in magnetic recording media. The grain size of about 10 nm was obtained in the as-deposited films, and subsequent annealing did not lead to significant grain growth. High coercivity up to 5640 Oe was achieved upon annealing. The Mrt value can be down to about 0.4 memu cm-2 for films with Hc exceeding 5000 Oe. The peak value of the delta M curves changed from a positive value in as-deposited films to a negative value for annealed films, indicating an obvious reduction of intergrain magnetic exchange coupling after annealing.

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Section: Introductionmentioning

confidence: 99%

High coercivity CoCrPt-SiO₂granular thin films for magnetic recording

Wang

2000

J. Phys. D: Appl. Phys.

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“…Other elements such as Ta, Nb, B are believed to reduce the exchange coupling. It is not clear whether these or other elements actually segregate to the Co alloy grain boundaries or if they drive other alloying elements (such as Cr) to do so, which in turn provides for the magnetic isolation of the grains [18,19].…”

Section: Chemical Segregationmentioning

confidence: 99%

Microstructural and crystallographic aspects of thin film recording media

Laughlin

Lü²,

Hsu³

et al. 2000

IEEE Trans. Magn.

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Various aspects of the structure of thin film longitudinal recording media are presented and discussed. In particular we discuss the role that the various layers of thin film media play in controlling the microstructure and magnetic properties of the magnetic layer. These include the grain size of the films, the texture of the films, the role of the intermediate layer and the role of chemical segregation.

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“…It has been reported that in Co/Cr layers, a post-deposition thermal treatment induces interdiffusion of metal atoms and allows the Co grain to segregate within the solid solution, this phenomenon being responsible for the increase of sample coercivity [6]. Annealed samples bear more resemblance to solid solutions than layered systems; however, the annealing process may result in undesired alteration of sample morphology and must be studied in detail.…”

Section: Introduction and Experimentalmentioning

confidence: 99%