7results about "Materials with iron" patented technology

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a contact angle with water, which is measured on a surface of the magnetic layer, is 95° or more and 105° or less, and standard deviation σ of the contact angle in a width direction of the surface of the magnetic layer is 1.0° or less.

Provided is a magnetic recording device capable of achieving an increase in recording density. According to an embodiment, the magnetic recording device includes a magnetic head and a control section. The magnetic head includes a first magnetic pole, a magnetic element, and a coil, and the magnetic element includes a magnetic layer. The control section is electrically connected to the magnetic element and the coil. The control section is capable of supplying a recording current to the coil and an element current to the magnetic element. The recording current includes a first period of a first polarity, a second period of a second polarity different from the first polarity, a third period of transition from the first period to the second period, and a fourth period of transition from the second period to the first period. The element current includes a direct current component and an alternating current component. The alternating current component in the first period is the same as the alternating current component in the second period, the alternating current component in the third period, and the alternating current component in the fourth period.

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a friction coefficient measured on a base portion of a surface of the magnetic layer is 0.35 or less, and standard deviation σ of the friction coefficient in a width direction of the surface of the magnetic layer is 0.05 nm or less.

Provided is a magnetic recording medium with which a decrease in electromagnetic conversion characteristics can be suppressed.　This magnetic recording medium has a tape shape and comprises a base body including a polyester, an underlayer provided on the base body, and a magnetic layer provided on the underlayer and containing a magnetic powder. The magnetic recording medium includes a lubricant. The arithmetic average roughness Ra of the surface of the magnetic layer is 1.3 nm or less. In a case where, when the magnetic recording medium is caused to slide on the glass-made simulated head, the average value of peak half-widths in a space increase region generated on an inlet side of a glass-made simulated head to which the magnetic recording medium is inserted is defined as a space index SRL, and when the magnetic recording medium is caused to slide on the glass-made simulated head, the average value of peak half-widths in a space increase region generated in the vicinity of a widthwise edge of the magnetic recording medium is defined as a space index SRT, the space index SRL is 35 μm or less, and the space index SRT is 68 μm or less.

The present invention is directed to providing a magnetic recording medium substrate having high heat resistance. The magnetic recording medium substrate includes an aluminum alloy substrate and a nickel alloy film disposed on at least one main surface of the aluminum alloy substrate, wherein the nickel alloy film comprises 0.5 wt% to 3 wt% Mo, 11 wt% to 15 wt% P, and 0.0001 wt% to 0.001 wt% Fe.

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 a friction coefficient of 0.35 or less as measured on a base material portion of a surface thereof and a standard deviation σ of the friction coefficient of 0.05 or less 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

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 a water contact angle in a range of 95° to 105°, inclusive, as measured on a surface thereof and a standard deviation σ of the water contact angle of 1.0° or less 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