Magnetic tunnel junctions

A magnetic tunnel junction comprising:

• a conductive first magnetic electrode comprising magnetic recording material;
• a conductive second magnetic electrode spaced from the first electrode and comprising magnetic reference material;
• a non-magnetic tunnel insulator material between the first and second electrodes;
• and
• the magnetic recording material of the first electrode comprising a first magnetic region, a second magnetic region spaced from the first magnetic region, and a third magnetic region spaced from the first and second magnetic regions;
• a first non-magnetic insulator metal oxide-comprising region between the first and second magnetic regions;
• and a second non-magnetic insulator metal oxide-comprising region between the second and third magnetic regions, the magnetic recording material of the first electrode comprising multiple more magnetic regions spaced from the third magnetic region and one another, and comprising multiple more non-magnetic insulator metal oxide-comprising regions;
• one of the multiple more magnetic regions being most-proximate the third magnetic region compared to all others of the multiple more magnetic regions, one of the multiple more metal oxide-comprising regions being between the third magnetic region and said most-proximate magnetic region, all respective other of the multiple metal oxide-comprising regions being between immediately adjacent of the multiple more magnetic regions.

A multiple-barrier magnetic tunnel junction comprising:

• a conductive first magnetic electrode comprising magnetic recording material;
• a conductive second magnetic electrode spaced from the first electrode and comprising first magnetic reference material;
• a first non-magnetic tunnel insulator material between the first and second electrodes;
• the magnetic recording material of the first electrode comprising a first magnetic region and a second magnetic region spaced from the first magnetic region, a non-magnetic insulator metal oxide-comprising region between the first and second magnetic regions, the first magnetic region being more proximate the first non-magnetic tunnel insulator material than the second magnetic region;
• a second non-magnetic tunnel insulator material spaced from the first non-magnetic tunnel insulator material over the second magnetic region of the magnetic recording material;
• and
• second magnetic reference material over the second non-magnetic tunnel insulator material, the second magnetic reference material comprising magnetic polarizer material proximate the second non-magnetic tunnel insulator material.

A magnetic tunnel junction comprising:

• a conductive first magnetic electrode comprising magnetic recording material;
• a conductive second magnetic electrode spaced from the first electrode and comprising magnetic reference material;
• a non-magnetic tunnel insulator material comprising metal oxide between the first and second electrodes;
• the magnetic recording material of the first electrode comprising a first magnetic region and a second magnetic region spaced from the first magnetic region, the first magnetic region being more proximate the non-magnetic tunnel insulator material than the second magnetic region;
• the first electrode comprising a first non-magnetic insulator metal oxide-comprising region between the first and second magnetic regions;
• and
• a second non-magnetic insulator metal oxide-comprising region spaced from the first non-magnetic tunnel insulator region over the second magnetic region of the magnetic recording material.