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US 6,914,807 B2Granted
Magnetic logic element and magnetic logic element array
AssigneeKabushiki Kaisha Toshiba
InventorsShiho Nakamura, Shigeru Haneda
Life of this patent
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Abstract
A magnetic logic element comprises a magnetic logic element cell having; a first and second magnetic parts; a MR intermediate part provided between the first and second magnetic parts. The magnetic logic element further includes a magnetization controlling part that controls a relation of directions of magnetizations of the first and second magnetic parts in accordance with a combination of a first binary input data and a second binary input data. A binary output data can be read by detecting a magnetoresistance effect of the first and second magnetic parts through the MR intermediate part.
Claims17
A magnetic logic device comprising a magnetic logic element cell having;
- a first and second magnetic parts;
- a MR intermediate part provided between the first and second magnetic parts;
- and
- a magnetization controlling part that controls a relation of directions of magnetizations of the first and second magnetic parts in accordance with a combination of a first binary input data and a second binary input data,
- wherein a binary output data is able to read by detecting a magnetoresistance effect of the first and second magnetic parts through the MR intermediate part.
2 more elements
A magnetic logic device comprising:
- a first hard magnetic part including a first ferromagnetic substance pinned in magnetization substantially in a first direction;
- a second hard magnetic part including a second ferromagnetic substance pinned in magnetization substantially in a second direction;
- a MR intermediate part provided between the first and second hard magnetic parts;
- a first soft magnetic part provided between the first hard magnetic part and the MR intermediate part, and having a third ferromagnetic substance;
- a second soft magnetic part provided between the second hard magnetic part and the MR intermediate part, and having a fourth ferromagnetic substance;
- a first spin transfer intermediate part provided between the first hard magnetic part and the first soft magnetic part;
- a second spin transfer intermediate part provided between the second hard magnetic part and the second soft magnetic part;
- and
- a controlling unit which passes a first writing current between the first hard magnetic part and the first soft magnetic part in correspondence with a first logic input signal to direct a magnetization of the third ferromagnetic substance in a direction substantially parallel or anti-parallel to the first direction,
- the controlling unit passing a second writing current between the second hard magnetic part and the second soft magnetic part in correspondence with a second logic input signal to direct a magnetization of the fourth ferromagnetic substance in a direction substantially parallel or anti-parallel to the second direction, and
- the controlling unit reading a logic output based on a relative relation of the directions of magnetizations of the third and fourth ferromagnetic substances, by passing a sense current between the first and second soft magnetic parts.
8 more elements
A magnetic logic device comprising:
- a first hard magnetic part including a first ferromagnetic substance pinned in magnetization substantially in a first direction;
- a second hard magnetic part including a second ferromagnetic substance pinned in magnetization substantially in a second direction;
- a MR intermediate part provided between the first and second hard magnetic parts;
- a first soft magnetic part provided between the first hard magnetic part and the MR intermediate part, and having a third ferromagnetic substance;
- a second soft magnetic part provided between the second hard magnetic part and the MR intermediate part, and having a fourth ferromagnetic substance;
- a first spin transfer intermediate part provided between the first hard magnetic part and the first soft magnetic part;
- a second spin transfer intermediate part provided between the second hard magnetic part and the second soft magnetic part;
- and
- a controlling unit which passes a first writing current between the first hard magnetic part and the first soft magnetic part in correspondence with a combination of a first logic input signal and a second logic input signal to direct a magnetization of the third ferromagnetic substance in a direction substantially parallel or anti-parallel to the first direction,
- the controlling unit reading a logic output based on a relative relation of the directions of magnetizations of the third and fourth ferromagnetic substances, by passing a sense current between the first and second soft magnetic parts.
7 more elements
A magnetic logic device comprising:
- a first hard magnetic part including a first ferromagnetic substance pinned in magnetization substantially in a first direction;
- a second hard magnetic part including a second ferromagnetic substance pinned in magnetization substantially in a second direction;
- a soft magnetic part provided between the first and the second hard magnetic parts, and having a third ferromagnetic substance;
- a spin transfer intermediate part provided between the first hard magnetic part and the soft magnetic part;
- a MR intermediate part provided between the second hard magnetic parts and the soft magnetic part;
- and
- a controlling unit which passes a first writing current between the first hard magnetic part and the soft magnetic part in correspondence with a combination of a first logic input signal and a second logic input signal to direct a magnetization of the third ferromagnetic substance in a direction substantially parallel or anti-parallel to the first direction,
- the controlling unit reading a logic output based on a relative relation of the directions of magnetizations of the second and the third ferromagnetic substances, by passing a sense current between the soft magnetic part and the second hard magnetic part.
5 more elements
A magnetic logic device comprising:
- a first hard magnetic part including a first ferromagnetic substance pinned in magnetization substantially in a first direction;
- a second hard magnetic part including a second ferromagnetic substance pinned in magnetization substantially in a second direction;
- a soft magnetic part provided between the first and the second hard magnetic parts, and having a third ferromagnetic substance;
- a spin transfer intermediate part provided between the first hard magnetic part and the soft magnetic part;
- a MR intermediate part provided between the second hard magnetic parts and the soft magnetic part;
- and
- a controlling unit which applies a first voltage to one of the first hard magnetic part and the soft magnetic part in correspondence with a first logic input signal, and applies a second voltage to another of the first hard magnetic part and the soft magnetic part in correspondence with a second input signal, a writing generated by a difference between the first and the second voltages directing a magnetization of the third ferromagnetic substance in a direction substantially parallel or anti-parallel to the first direction, and
- the controlling unit reading a logic output based on a relative relation of the second direction and the direction of the magnetization of the third ferromagnetic substance, by passing a sense current between the soft magnetic part and the second hard magnetic part.
5 more elements
Dependencies are inferred from the claim text.