Memory Devices Comprising Magnetic Tracks Individually Comprising A Plurality Of Magnetic Domains Having Domain Walls And Methods Of Forming A Memory Device Comprising Magnetic Tracks Individually Comprising A Plurality Of Magnetic Domains Having Domain Walls

9-24. (canceled)

A method of forming a memory device comprising magnetic tracks individually comprising a plurality of magnetic domains having domain walls, comprising:

• forming a series of regions having coplanar outer surfaces, immediately adjacent of the regions being of different composition relative one another;
• and
• forming a plurality of magnetic tracks over the coplanar outer surfaces of and which angle relative to the different composition regions, interfaces of immediately adjacent of the regions individually comprising a domain wall pinning site in individual of the magnetic tracks.

A memory device comprising magnetic tracks individually comprising a plurality of magnetic domains having domain walls, comprising:

• a series of regions having coplanar outer surfaces, immediately adjacent of the regions being of different composition relative one another;
• and
• a plurality of magnetic tracks over the coplanar outer surfaces of and which angle relative to the different composition regions, interfaces of immediately adjacent of the regions individually comprising a domain wall pinning site in individual of the magnetic tracks.

36-37. (canceled)

39-47. (canceled)

A memory device comprising magnetic tracks individually comprising a plurality of magnetic domains having domain walls, comprising:

• a series of elevationally stacked regions having openings extending elevationally through at least some of the regions, immediately adjacent of the regions being of different composition relative one another, the openings individually comprising opposing sidewalls and a base;
• and
• a magnetic track within individual of the openings against the opposing opening sidewalls and the opening base, interfaces of immediately adjacent of the regions along an individual sidewall individually comprising a domain wall pinning site in the magnetic track along that sidewall.

49-60. (canceled)