Magnetic sensor, magnetic head, and magnetic memory by using spin Hall devices

A magnetic head comprising:

• a stacked film having a nonmagnetic spin Hall layer, a magnetic layer, and a nonmagnetic insulator layer arranged between the nonmagnetic spin Hall layer and the magnetic layer;
• an electrode nonmagnetic terminal pair connected to a side surface of the nonmagnetic spin Hall layer;
• a unit applying a current in a film thickness direction of the stacked film;
• and
• a magnetic shield arranged on both side surfaces of the stacked film,
• wherein the nonmagnetic spin Hall layer is a layer in which up spins and down spins of the spin Hall effect are bent in a reverse direction in a nonmagnetic body due to spin-orbital interaction,
• a thickness of the nonmagnetic spin Hall layer is thinner than twice a spin diffusion length of a material constituting the nonmagnetic spin Hall layer, and
• a direction of an external magnetic field applied to the magnetic layer is detected by detecting a magnetization direction of the magnetic layer due to the polarity of a voltage across both ends of the electrode nonmagnetic terminal pair.

A magnetic memory comprising:

• a stacked film having a nonmagnetic spin Hall layer, a magnetic layer, and a nonmagnetic insulator layer arranged between the nonmagnetic spin Hall layer and the magnetic layer;
• an electrode nonmagnetic terminal pair connected to a side surface of the nonmagnetic spin Hall layer;
• a unit applying a current in a film thickness direction of the stacked film;
• and
• a unit applying a current between the electrode nonmagnetic terminal pair,
• wherein the nonmagnetic spin Hall layer is a layer in which up spins and down spins of the spin Hall effect are bent in a reverse direction in a nonmagnetic body due to spin-orbital interaction,
• a thickness of the nonmagnetic spin Hall layer is thinner than twice a spin diffusion length of a material constituting the nonmagnetic spin Hall layer, and
• a magnetization direction of the magnetic layer is reversed due to the polarity of a current applied between the electrode nonmagnetic terminal pair.