Abstract: [Solving Means] A magnetic recording medium according to an embodiment of the present technology is a tape-shaped magnetic recording medium, including: a magnetic layer including a servo band, a servo signal being recorded on the servo band. An index expressed by Sq×Fact.(p?p)/F0(p?p) is 0.42 or more, Sq being a squareness ratio of the magnetic layer in a perpendicular direction, F0(p?p) being a peak-to-peak value of a first magnetic force gradient strength observed by a magnetic force microscope when a servo signal is saturation-recorded on the magnetic layer, Fact.(p?p) being a peak-to-peak value of a second magnetic force gradient strength for the servo signal recorded on the servo band observed by the magnetic force microscope.

Abstract: An object is to provide a magnetic recording medium having favorable crystal orientation characteristics and exhibiting a high SNR. The present technology provides a magnetic recording medium having a layer structure including a recording layer, a ground layer, and a base layer in this order, in which the ground layer includes a first ground layer on the recording layer side and a second ground layer on the base layer side, the first ground layer contains a nonmagnetic oxide, the first ground layer has a thickness of 2 nm or more and 10 nm or less, and the second ground layer has a thickness of 40 nm or more. Furthermore, the present technology also provides a magnetic recording cartridge including the magnetic recording medium.

Abstract: A magnetic recording medium includes a flexible and elongated substrate, a soft magnetic layer having an average thickness of 10 nm or more to 50 nm or less, and a recording layer. The soft magnetic layer is disposed between the substrate and the recording layer, and a difference in Young's modulus between the magnetic recording medium and the substrate in a longitudinal direction of the substrate is 2.4 GPa or more.

Abstract: To provide a magnetic recording tape and the like that have excellent magnetic properties and exhibit a favorable SNR. There are provided a magnetic recording tape and the like including at least: a base layer that includes a long film having flexibility; and a magnetic layer formed on a side of one main surface of the base layer, in which an under layer and a seed layer are provided in the stated order from a side of the magnetic layer toward a side of the base layer between the magnetic layer and the base layer, the underlayer contains at least Co and Cr, and has an average atomic number ratio represented by the following formula (1): Co(100-y)Cry (where y is within a range of 37?y?45.), and the seed layer formed directly on the base layer has a film thickness of 5 nm or more and 30 nm or less, and contains Ti and O and has an average atomic number ratio represented by the following formula (2): Ti(100-x)Ox (where x?10.

Abstract: There is provided a magnetic recording medium including a base; a seed layer; a foundation layer; and a recording layer, the seed layer being disposed between the base and the foundation layer, having an amorphous state, including an alloy containing Ti, Cr and O, a percentage of Ti being 30 atomic % to 100 atomic % based on a total amount of Ti and Cr contained in the seed layer, and a percentage of O being 15 atomic % or less based on a total amount of Ti, Cr and O contained in the seed layer. Also, a production method thereof is provided.

Abstract: [Solving Means] A magnetic recording medium according to an embodiment of the present technology is a tape-shaped magnetic recording medium, including: a magnetic layer including a servo band, a servo signal being recorded on the servo band. An index expressed by Sq×Fact.(p?p)/F0(p?p) is 0.42 or more, Sq being a squareness ratio of the magnetic layer in a perpendicular direction, F0(p?p) being a peak-to-peak value of a first magnetic force gradient strength observed by a magnetic force microscope when a servo signal is saturation-recorded on the magnetic layer, Fact.(p?p) being a peak-to-peak value of a second magnetic force gradient strength for the servo signal recorded on the servo band observed by the magnetic force microscope.

Abstract: An object is to suppress or prevent a dimensional change of a magnetic recording tape. The present technology provides a magnetic recording tape having a layer structure including a magnetic layer, a base layer, and a back layer in this order, in which a reinforcing layer containing a metal or a metal oxide is disposed on either a surface of the base layer on the magnetic layer side or a surface of the base layer on the back layer side, and a black area in an image obtained by binarizing an optical microscope image of a rectangular region of 64 ?m×48 ?m of the reinforcing layer is 300 ?m2 or less.

Abstract: To provide a magnetic recording tape and the like that have excellent magnetic properties and exhibit a favorable SNR. There are provided a magnetic recording tape and the like including at least: a base layer that includes a long film having flexibility; and a magnetic layer formed on a side of one main surface of the base layer, in which an under layer and a seed layer are provided in the stated order from a side of the magnetic layer toward a side of the base layer between the magnetic layer and the base layer, the underlayer contains at least Co and Cr, and has an average atomic number ratio represented by the following formula (1): Co(100-y)Cry (where y is within a range of 37?y?45.), and the seed layer formed directly on the base layer has a film thickness of 5 nm or more and 30 nm or less, and contains Ti and O and has an average atomic number ratio represented by the following formula (2): Ti(100-x)Ox (where x?10.

Abstract: A magnetic recording medium includes: an elongated substrate having flexibility; a first layer, being provided on the substrate, containing Cr, Ni, and Fe, and having a face-centered cubic lattice structure with a (111) plane preferentially oriented so as to be parallel to a surface of the substrate; a second layer, being provided on the first layer, containing Co and O, having a ratio of an average atomic concentration of O to an average atomic concentration of Co of 1 or more, and having a column structure with an average particle diameter of 3 nm or more and 13 nm or less; a third layer, being provided on the second layer, and containing Ru; and a perpendicular recording layer, being provided on the third layer.

Abstract: A magnetic recording medium includes: a flexible and elongated substrate; a soft magnetic layer having an average thickness of 10 nm or more to 50 nm or less; and a recording layer, in which the soft magnetic layer is disposed between the substrate and the recording layer, and a difference in Young's modulus between the magnetic recording medium and the substrate in a longitudinal direction of the substrate is 2.4 GPa or more.

Abstract: A magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 nm or less, the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 ?m) of the recording surface is 256 or more, and the number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less.

Abstract: A magnetic recording medium includes a long-shaped base substrate having flexibility, a soft magnetic layer, and a magnetic recording layer. A squareness ratio in a longitudinal direction of the base substrate is equal to or less than a squareness ratio in a short-side direction of the base substrate. The squareness ratio in the longitudinal direction of the base substrate is 30% or less.

Abstract: A magnetic recording medium includes a substrate, a seed layer, an under layer, and a perpendicular recording layer having a granular structure. (Ms·??1.5(1?Rs)0.33), Ms, and ? satisfy (Ms·?·?1.5(1?Rs)0.33)?0.1 [?·emu·(mm)?1.5], Ms?450 [emu/cc], and ??1.2. In the above formulas, Ms indicates a saturated magnetization amount, ? indicates the gradient of a M-H loop around a coercive force Hc, ? indicates the thickness of the perpendicular recording layer, and Rs indicates a squareness ratio.

Abstract: A magnetic recording medium includes: an elongated substrate having flexibility; a first layer, being provided on the substrate, containing Cr, Ni, and Fe, and having a face-centered cubic lattice structure with a (111) plane preferentially oriented so as to be parallel to a surface of the substrate; a second layer, being provided on the first layer, containing Co and O, having a ratio of an average atomic concentration of O to an average atomic concentration of Co of 1 or more, and having a column structure with an average particle diameter of 3 nm or more and 13 nm or less; a third layer, being provided on the second layer, and containing Ru; and a perpendicular recording layer, being provided on the third layer.

Abstract: A magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 ?m or less, the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 ?m) of the recording surface is 256 or more, and the number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less.

Abstract: A magnetic recording medium includes a long-shaped base substrate having flexibility, a soft magnetic layer, and a magnetic recording layer. A squareness ratio in a longitudinal direction of the base substrate is equal to or less than a squareness ratio in a short-side direction of the base substrate. The squareness ratio in the longitudinal direction of the base substrate is 30% or less.

Abstract: A magnetic recording medium includes a substrate, a seed layer, an under layer, and a perpendicular recording layer having a granular structure. (Ms·??1.5(1?Rs)0.33), Ms, and ? satisfy (Ms·?·?1.5(1?Rs)0.33)?0.1 [?·emu·(mm)?1.5], Ms?450 [emu/cc], and ??1.2. In the above formulas, Ms indicates a saturated magnetization amount, ? indicates the gradient of a M-H loop around a coercive force Hc, ? indicates the thickness of the perpendicular recording layer, and Rs indicates a squareness ratio.

Abstract: There is provided a magnetic recording medium including a surface having a longitudinal direction and a lateral direction. An arithmetic average roughness Ra, a ratio PSDMD,short/PSDTD,short, and a ratio PSDMD,long/PSDTD,long on the surface satisfy Ra?3.0 nm, PSDMD,short/PSDTD,short?0.65, and 1.3?PSDMD,long/PSDTD,long?2.3, in which PSDMD,short is an average value of PSD values in a range from 0.15 ?m to 0.4 ?m in the longitudinal direction of the surface, PSDTD,short is an average value of PSD values in a range from 0.15 ?m to 0.4 ?m in the lateral direction of the surface, PSDMD,long is an average value of PSD values in a range from 0.4 ?m to 5.0 ?m in the longitudinal direction of the surface, and PSDTD,long is an average value of PSD values in a range from 0.4 ?m to 5.0 ?m in the lateral direction of the surface.

Abstract: A temperature adjustment device includes: at least one first Peltier unit having a heat absorption surface and a heat release surface; at least one second Peltier unit having a heat absorption surface and a heat release surface; a controller which controls the drive currents of the first Peltier unit and the second Peltier unit; a primary circulation mechanism which circulates a primary refrigerant between a first heat release block and a heat absorption block; at least one second heat release block which has a flow path through which a secondary refrigerant flows, receives heat from the heat release surface of the second Peltier unit and transmits the heat to the secondary refrigerant; a heat exchanger which receives the secondary refrigerant discharged from the second heat release block and releases heat; and a secondary circulation mechanism which circulates the secondary refrigerant between the second heat release block and the heat exchanger.

Abstract: A magnetic recording medium includes a base material which has flexibility, a lower coating layer, and a recording layer, in which, in X-ray diffraction peaks, a value of ??50 where a diffraction peak of magnetic atoms which are included in the recording layer is measured by a locking curve method is 5° or more to less than 10°.