Magnetic random access memory having magnetoresistive element
First Claim
1. A magnetic random access memory including a magnetoresistive element which has a recording layer, a fixed layer, and an intermediate nonmagnetic layer arranged between the recording layer and the fixed layer, the recording layer comprising a first ferromagnetic layer which is formed on the intermediate nonmagnetic layer, a first nonmagnetic layer which is formed on the first ferromagnetic layer, a second ferromagnetic layer which is formed on the first nonmagnetic layer and magnetically coupled with the first ferromagnetic layer via the first nonmagnetic layer by first magnetic coupling, a second nonmagnetic layer which is formed on the second ferromagnetic layer, and a third ferromagnetic layer which is formed on the second nonmagnetic layer and magnetically coupled with the second ferromagnetic layer via the second nonmagnetic layer by second magnetic coupling, wherein one of a state in which the first magnetic coupling is anti-ferromagnetic coupling and the second magnetic coupling is ferromagnetic coupling, and a state in which the first magnetic coupling is ferromagnetic coupling and the second magnetic coupling is anti-ferromagnetic coupling is obtained.
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Abstract
A magnetic random access memory includes a magnetoresistive element which has a recording layer, a fixed layer, and an intermediate nonmagnetic layer, the recording layer comprising a first ferromagnetic layer formed on the intermediate nonmagnetic layer, a first nonmagnetic layer formed on the first ferromagnetic layer, a second ferromagnetic layer formed on the first nonmagnetic layer and magnetically coupled with the first ferromagnetic layer by first magnetic coupling, a second nonmagnetic layer formed on the second ferromagnetic layer, and a third ferromagnetic layer formed on the second nonmagnetic layer and magnetically coupled with the second ferromagnetic layer by second magnetic coupling, wherein one of a state in which the first magnetic coupling is anti-ferromagnetic coupling and the second magnetic coupling is ferromagnetic coupling, and a state in which the first magnetic coupling is ferromagnetic coupling and the second magnetic coupling is anti-ferromagnetic coupling is obtained.
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Citations
20 Claims
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1. A magnetic random access memory including a magnetoresistive element which has a recording layer, a fixed layer, and an intermediate nonmagnetic layer arranged between the recording layer and the fixed layer,
the recording layer comprising a first ferromagnetic layer which is formed on the intermediate nonmagnetic layer, a first nonmagnetic layer which is formed on the first ferromagnetic layer, a second ferromagnetic layer which is formed on the first nonmagnetic layer and magnetically coupled with the first ferromagnetic layer via the first nonmagnetic layer by first magnetic coupling, a second nonmagnetic layer which is formed on the second ferromagnetic layer, and a third ferromagnetic layer which is formed on the second nonmagnetic layer and magnetically coupled with the second ferromagnetic layer via the second nonmagnetic layer by second magnetic coupling, wherein one of a state in which the first magnetic coupling is anti-ferromagnetic coupling and the second magnetic coupling is ferromagnetic coupling, and a state in which the first magnetic coupling is ferromagnetic coupling and the second magnetic coupling is anti-ferromagnetic coupling is obtained.
Specification