Magnetic recording medium

A magnetic recording cartridge comprising a magnetic recording medium having a layer structure including a recording layer, a ground layer, and a base layer in this order,

• the ground layer including a first ground layer on the recording layer side and a second ground layer on the base layer side,
• the first ground layer containing a nonmagnetic oxide, the first ground layer having a thickness of 2 nm or more and 10 nm or less, and the second ground layer having a thickness of 40 nm or more, wherein
• the magnetic recording medium is housed in a state of being wounded around a reel, and
• wherein the recording layer contains a Co-based alloy particle, and an X-ray relative intensity values of in-plane X-ray diffraction on a (11.0) plane and a (10.0) plane of the Co-based alloy particle satisfy a following relational formula:
• ΔI(11.0)/ΔI(10.0)≥0.7
• in which ΔI(11.0)=|I(11.0)−IBG(11.0)| and ΔI(10.0)=|I(10.0)−IBG(10.0)|, and I(11.0) represents an X-ray relative intensity value on the (11.0) plane, IBG(11.0) represents a background value of the X-ray relative intensity value on the (11.0) plane, I(10.0) represents an X-ray relative intensity value on the (10.0) plane, and IBG(10.0) represents a background value of the X-ray relative intensity value on the (10.0) plane.

A magnetic recording medium having a layer structure including a recording layer, a ground layer, and a base layer in this order, wherein

• the ground layer includes a first ground layer on the recording layer side and a second ground layer on the base layer side, and
• 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,
• wherein an intermediate layer containing ruthenium is formed between the recording layer and the first ground layer,
• wherein the intermediate layer contains a ruthenium alloy, and
• wherein the ruthenium alloy has an average atomic number ratio represented by a following formula (3):
• [RuxCoyCr100-x-y]100-z(MO2)z (3)
• in which, in the formula (3), x satisfies 10≤x≤60, y satisfies 20≤y≤40, z satisfies 5≤z≤20, and M is Ti or Si.

A magnetic recording cartridge comprising a magnetic recording medium having a layer structure including a recording layer, a ground layer, and a base layer in this order,

• the ground layer including a first ground layer on the recording layer side and a second ground layer on the base layer side,
• the first ground layer containing a nonmagnetic oxide, the first ground layer having a thickness of 2 nm or more and 10 nm or less, and the second ground layer having a thickness of 40 nm or more,
• wherein the magnetic recording medium is housed in a state of being wounded around a reel,
• wherein an intermediate layer containing ruthenium is formed between the recording layer and the first ground layer,
• wherein the intermediate layer contains a ruthenium alloy, and
• wherein the ruthenium alloy has an average atomic number ratio represented by a following formula (3):
• [RuxCoyCr100-x-y]100-z(MO2)z (3)
• in which, in the formula (3), x satisfies 10≤x≤60, y satisfies 20≤y≤40, z satisfies 5≤z≤20, and M is Ti or Si.