JP2001101651A5

JP2001101651A5 -

Info

Publication number: JP2001101651A5
Application number: JP1999282424A
Authority: JP
Filing date: 1999-10-04
Publication date: 2004-10-14
Anticipated expiration: 2019-10-04

Claims

A first underlayer formed on the substrate;
A second underlayer formed on the first underlayer and containing a (100) -oriented Cr-based alloy having a bcc structure;
A third underlayer formed on the second underlayer and containing an alloy containing Co as a main component and having a hcp structure and having a (11.0) orientation;
A magnetic layer formed on the third underlayer and containing an alloy crystal mainly composed of Co and having an (11.0) orientation and having an hcp structure and containing an oxide or a nitride;
The concentration of the oxide or nitride is 3 mol% or more and 50 mol% or less based on all elements of the magnetic layer;
The hcp structure alloy crystal containing Co as a main component contained in the magnetic layer is separated from each other by the oxide or the nitride, and the axis of easy magnetization of the hcp structure alloy crystal containing Co as a main component is on the substrate surface. A magnetic recording medium characterized by being oriented substantially parallel to the magnetic recording medium.

A first underlayer containing alloy is formed on the substrate and B ₂ structure or L ₂₁ structures or C _11b structure,
A second underlayer formed on the first underlayer and containing an alloy containing Cr as a main component and having a (211) orientation and having a bcc structure;
A third underlayer that is formed on the second underlayer and that has an hcp structure and contains a (10.0) -oriented Co-based alloy;
A magnetic layer formed on the third underlayer and having an hcp structure and containing (10.0) oriented Co-based alloy crystal and oxide or nitride;
The concentration of the oxide or nitride is 3 mol% or more and 50 mol% or less based on all elements of the magnetic layer;
The alloy crystal of the hcp structure containing Co as a main component is separated from each other by the oxide or nitride, and the easy axis of magnetization of the alloy crystal of the hcp structure containing Co as the main component is substantially with respect to the substrate surface. A magnetic recording medium characterized by being oriented in parallel.

The third underlayer having the hcp structure containing Co as a main component contains any of Cr, V, and Mn in an amount of 25 at% or more and 50 at% or less, and further contains W, Mo, Ta, Pt, Ti, 3. The magnetic recording medium according to claim 1, wherein the magnetic recording medium contains at least one element selected from Nb, Al, Cu, Ru, and Pd at 20 at% or less.

3. The magnetic recording medium according to claim 1, wherein the third underlayer having an hcp structure containing Co as a main component contains Ru in an amount of 30 at% or more and 80 at% or less.

A first underlayer formed on the substrate;
A second underlayer formed on the first underlayer and containing a (100) -oriented Cr-based alloy having a bcc structure;
A third underlayer formed on the second underlayer and containing (100) -oriented Ag or an alloy containing Ag as a main component or having an (100) -oriented B ₂ structure having an fcc structure;
A magnetic layer formed on the third underlayer and having an hcp structure and containing (11.0) oriented Co-based alloy crystals and oxides or nitrides;
The concentration of the oxide or nitride is 3 mol% or more and 50 mol% or less based on all elements of the magnetic layer;
The alloy crystal of the hcp structure containing Co as a main component is separated from each other by the oxide or nitride, and the easy axis of magnetization of the alloy crystal of the hcp structure containing Co as the main component is substantially with respect to the substrate surface. A magnetic recording medium characterized by being oriented in parallel.

A magnetic recording medium, a driving unit for driving the magnetic recording medium in the recording direction, a composite magnetic head having both a recording induction head and a reproducing magnetoresistive head, and recording for processing input / output signals from the composite magnetic head A magnetic storage device having a reproduction signal processing unit;
A magnetic storage device comprising the magnetic recording medium according to claim 1 as the magnetic recording medium.