Arithmetic device

An arithmetic device, comprising:

• an arithmetic element part;
• and
• a controller,
• the arithmetic element part including
• a first element including a first conductive member and a first stacked body, the first conductive member including a first portion, a second portion, and a third portion between the first portion and the second portion, the first stacked body including a first magnetic layer, and a first counter magnetic layer provided between the third portion and the first magnetic layer, and
• a second element including a second conductive member and a second stacked body, the second conductive member including a fourth portion, a fifth portion, and a sixth portion between the fourth portion and the fifth portion, the second stacked body including a second magnetic layer, and a second counter magnetic layer provided between the sixth portion and the second magnetic layer, the second portion and the fourth portion being electrically connected,
• the controller being configured to perform an XNOR operation of a first input and a second input, the first input corresponding to a first electrical resistance of the first stacked body and a second electrical resistance of the second stacked body, the second input corresponding to a potential of the first magnetic layer and a potential of the second magnetic layer,
• wherein
• the controller is configured to perform a first supply operation, a measurement operation, and a second supply operation,
• in the first supply operation, the controller supplies a first current to the first conductive member, and supplies a second current to the second conductive member,
• in the measurement operation, the controller measures the first electrical resistance after the supply of the first current and the second electrical resistance after the supply of the second current, and
• in the second supply operation, the controller supplies a third current to the first conductive member and supplies a fourth current to the second conductive member after the measurement operation.