Magnetic tape, magnetic tape cartridge, and magnetic tape device

Abstract

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having an AlFeSil abrasion value in a range of 20 to 50 μm, inclusive, as measured on a surface thereof and a standard deviation σ of the AlFeSil abrasion value of 5.0 μm or less as derived in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

Claims

[Claim 1] A magnetic tape comprising a non-magnetic support and a magnetic layer containing ferromagnetic powder, The AlFeSil wear value measured on the surface of the magnetic layer is 20 μm or more and 50 μm or less, and A magnetic tape in which the standard deviation σ of the AlFeSil wear value, determined in the width direction of the surface of the magnetic layer, is 5.0 μm or less. [Claim 2] The magnetic tape according to claim 1, wherein the standard deviation σ of the AlFeSil wear value is 1.0 μm or more and 5.0 μm or less. [Claim 3] The magnetic tape according to claim 1, wherein the standard deviation σ of the AlFeSil wear value is 1.0 μm or more and 1.5 μm or less. [Claim 4] The activation volume of the ferromagnetic powder is 1000 nm ３ 2500nm or more ３ The magnetic tape according to claim 1, which is as follows: [Claim 5] The magnetic tape according to claim 1, wherein the ferromagnetic powder is a plate-shaped ferromagnetic powder having an average plate-like ratio of 2.5 or more and 4.0 or less. [Claim 6] The magnetic layer has a specific surface area of ​​30 m² as measured by the BET method. ２ The magnetic tape according to claim 1, further comprising an oxide abrasive of 1g or more. [Claim 7] The magnetic tape according to claim 1, further comprising a non-magnetic layer containing non-magnetic powder between the non-magnetic support and the magnetic layer. [Claim 8] The magnetic tape according to claim 7, wherein the thickness of the non-magnetic layer is 0.1 μm or more and 0.7 μm or less. [Claim 9] The magnetic tape according to claim 1, further comprising a back coat layer containing non-magnetic powder on the surface side of the non-magnetic support opposite to the surface side having the magnetic layer. [Claim 10] The magnetic tape according to claim 1, wherein the tape thickness is 5.2 μm or less. [Claim 11] The magnetic tape according to claim 1, wherein the tape thickness is 5.0 μm or less. [Claim 12] The magnetic tape according to claim 1, wherein the vertical aspect ratio of the magnetic tape is 0.60 or greater. [Claim 13] The magnetic tape according to claim 1, wherein the vertical aspect ratio of the magnetic tape is 0.65 or more. [Claim 14] The standard deviation σ of the AlFeSil wear value is 1.0 μm or more and 1.5 μm or less. The ferromagnetic powder has an activation volume of 1000 nm. ３ 2500nm or more ３ The following are plate-shaped ferromagnetic powders having an average plate-like ratio of 2.5 or more and 4.0 or less: The magnetic layer has a specific surface area of ​​30 m² as measured by the BET method. ２ It further contains an oxide abrasive of / g or more, The non-magnetic support and the magnetic layer further comprise a non-magnetic layer containing non-magnetic powder. The thickness of the non-magnetic layer is 0.1 μm or more and 0.7 μm or less. The non-magnetic support further has a back coat layer containing non-magnetic powder on the surface side opposite to the surface side having the magnetic layer, The tape thickness is 5.0 μm or less, and The magnetic tape according to claim 1, wherein the vertical aspect ratio of the magnetic tape is 0.65 or more. [Claim 15] A magnetic tape cartridge comprising the magnetic tape described in any one of claims 1 to 14. [Claim 16] A magnetic tape device including the magnetic tape according to any one of claims 1 to 14. [Claim 17] Further including a magnetic head, The magnetic head has a module including an element array having a plurality of magnetic head elements between a pair of servo signal reading elements, and The magnetic tape device according to claim 16, wherein the magnetic tape device changes the angle θ that the axis of the element array makes with respect to the width direction of the magnetic tape while the magnetic tape is running within the magnetic tape device.

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