Digital recording properties of evaporated cobalt films

Davies, A. V.; Middleton, B.K.; Tickle, Andrew C.

doi:10.1109/tmag.1965.1062985

Cited by 32 publications

(2 citation statements)

References 5 publications

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“…The variation of the coercivity with thickness shows a marked increase in coercivity in the range 750-1000 A, with a gradual decrease in coercivity for thicker films. Middleton and Walker (1966) and Davies et al (1965) have reported the thickness dependence of the coercivity of evaporated cobalt films deposited on glass and melinex substrates respectively. Their results are similar to those obtained here, the coercivity showing a marked increase in the range 750-1000 A and a gradual decrease for thicker films.…”

Section: Discussionmentioning

confidence: 99%

“…Transverse susceptibilities were measured with a conventional induction loop plotter where the unintegrated signal from a pick-up coil is displayed as a function of longitudinal d.c. field on an XY recorder (Feldtkeller 1963). In all cases the hysteretic measurements were made simultaneously on both surfaces of each film and, in describing the results, 'front surface' is used to mean the free surface of the film and 'back surface' to mean the surface in contact with the substrate.…”

Section: Experimental Techniquesmentioning

confidence: 99%

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Rotatable initial susceptibility in evaporated cobalt films

Carey¹,

Isaac²,

Thomas³

1969

J. Phys. D: Appl. Phys.

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The magnetization reversal process in evaporated cobalt films in the thickness range 1000-4000 Å has been studied by use of the transverse Kerr effect to display hysteresis loops and the longitudinal Kerr effect to observe magnetic domain structures. The samples investigated all exhibit a rotatable initial susceptibility and an unusual mode of magnetization reversal, which suggests that the films behave as random assemblies of magnetostatically interacting uniaxial crystallites.

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Section: Discussionmentioning

confidence: 99%

Section: Experimental Techniquesmentioning

confidence: 99%

Rotatable initial susceptibility in evaporated cobalt films

Carey¹,

Isaac²,

Thomas³

1969

J. Phys. D: Appl. Phys.

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Magnetic Materials for Information Storage Devices

Ouchi

1998

Frontiers in Magnetism of Reduced Dimension Systems

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Theory and Experiment in Magnetic Recording

Speliotis

1968

Journal of Applied Physics

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The traditional dominance of gamma ferric oxide as the ferromagnetic constituent of recording media is currently being challenged by the development of new particles, such as chrome dioxide and metallic particles, as well as thin metallic films of high coercivities. These new materials allow for a large variation of the magnetic properties and the thickness of the recording surfaces, and offer considerably greater potential for recording optimization in high-storage applications. They have also brought about a renewed interest in the theory of magnetic recording, particularly pertaining to the correlation between the magnetic properties and recording performance. In this paper we discuss the present status of theory and experiment in magnetic recording. It is concluded that our present theoretical understanding is such as to adequately explain the geometrical aspects of the recording process—transducer to medium spacing, transducer gap length, and medium thickness—but less than adequate in characterizing the magnetic state of the recording media.

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Digital recording properties of evaporated cobalt films

Cited by 32 publications

References 5 publications

Rotatable initial susceptibility in evaporated cobalt films

Rotatable initial susceptibility in evaporated cobalt films

Magnetic Materials for Information Storage Devices

Theory and Experiment in Magnetic Recording

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