Abstract: According to one embodiment, a magnetic sensor includes a base body including a base body end portion, a magnetic member, and an element part. A direction from the base body toward the magnetic member is along a first direction. The element part includes first and second magnetic elements. An orientation from the first magnetic element toward the second magnetic element is along a second direction crossing the first direction. A portion of the first magnetic element and a portion of the second magnetic element are between the base body and the magnetic member. A position in a third direction of an other portion of the first magnetic element and a position in the third direction of an other portion of the second magnetic element are between a position in the third direction of the base body end portion and a position in the third direction of the magnetic member.

Abstract: According to one embodiment, a sensor includes an element part, and a control circuit part. The element part includes first and second elements. Each of the first and second elements includes a first magnetic element and a first conductive member. The control circuit part includes a first current circuit, a differential circuit, and a phase detection circuit. The first current circuit is configured to supply a first current to the first conductive member. The differential circuit is configured to output a differential signal corresponding to a difference of a first signal and a second signal. The first signal corresponds to a change in a first electrical resistance of the first magnetic element of the first element. The second signal corresponds to a change in a second electrical resistance of the first magnetic element of the second element. The phase detection circuit is configured to perform a phase detection of the differential signal.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a stacked member including a first planar portion. The first planar portion includes a first stacked body. The first stacked body includes a plurality of non-magnetic layers including Cr and Ti, and a plurality of first magnetic layers. A direction from one of the first magnetic layers to an other one of the first magnetic layers is along a first direction. One of the non-magnetic layers is between the one of the first magnetic layers and the other one of the first magnetic layers. The one of the first non-magnetic layers includes an amorphous region. The one of the first magnetic layers and the other one of the first magnetic layers include a crystal region.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a stacked member. The stacked member includes a base body including a first surface including unevenness, a first conductive member including Cu, and a first layer provided between the first surface and the first conductive member. The first layer includes Cr and Ti.

Abstract: According to one embodiment, a sensor includes a first magnetic member, a first counter magnetic member, a first magnetic element, and a first magnetic interconnect. A direction from the first magnetic member to the first counter magnetic member is along a first direction. A first gap is provided between the first magnetic member and the first counter magnetic member. The first magnetic element includes a first magnetic region. A second direction from the first magnetic region to the first gap crosses the first direction. A direction from the first magnetic interconnect to the first magnetic region is along the second direction.

Abstract: According to one embodiment, a sensor includes an element part, and a control circuit part. The element part includes first and second elements. Each of the first and second elements includes a first magnetic element and a first conductive member. The control circuit part includes a first current circuit, a differential circuit, and a phase detection circuit. The first current circuit is configured to supply a first current to the first conductive member. The differential circuit is configured to output a differential signal corresponding to a difference of a first signal and a second signal. The first signal corresponds to a change in a first electrical resistance of the first magnetic element of the first element, The second signal corresponds to a change in a second electrical resistance of the first magnetic element of the second element. The phase detection circuit is configured to perform a phase detection of the differential signal.

Abstract: According to one embodiment, a magnetic sensor includes a base body, a magnetic member, and an element part. The base body includes a base body end portion. A direction from the base body toward the magnetic member is along a first direction. The element part includes a first magnetic element and a second magnetic element. A position of the first magnetic element and a position of the second magnetic element in a second direction are between a position of the base body end portion in the second direction and a position of the magnetic member in the second direction. The second direction crosses the first direction. A first distance along the second direction between the base body end portion and the element part is greater than a second distance along the second direction between the element part and the magnetic member.

Abstract: According to one embodiment, a magnetic sensor includes a first conductive part circuit, an alternating current circuit part, a first direct current circuit part, and a first element. The first conductive part circuit includes a first conductive part including a first conductive part end portion and a first conductive part other-end portion, and a first alternating current transfer element electrically connected in series with the first conductive part. The first conductive part circuit includes a first circuit end portion and a first circuit other-end portion. The alternating current circuit part is configured to apply an alternating current voltage between the first circuit end portion and the first circuit other-end portion. The first direct current circuit part is configured to apply a first direct current voltage to the first conductive part end portion and the first conductive part other-end portion. The first element includes a first magnetic layer.

Abstract: According to one embodiment, a magnetic sensor includes a first magnetic element, a second magnetic element, a third magnetic element located between the first and second magnetic elements in a first direction, a fourth magnetic element located between the third and second magnetic elements in the first direction, a first conductive member, a second conductive member, a third conductive member located between the first and second conductive members in the first direction, a fourth conductive member located between the third and second conductive members in the first direction, a first magnetic member, a second magnetic member, a third magnetic member located between the first and second magnetic members in the first direction, a fourth magnetic member located between the third and second magnetic members in the first direction, and a fifth magnetic member located between the third and fourth magnetic members in the first direction.

Abstract: According to one embodiment, a magnetic sensor includes a first element part. The first element part includes a first magnetic element, a first conductive member, a first magnetic member, and a second magnetic member. The first magnetic element includes a first magnetic layer, a first counter magnetic layer, and a first nonmagnetic layer provided between the first magnetic layer and the first counter magnetic layer. A direction from the first magnetic layer toward the first counter magnetic layer is along a first direction. The second magnetic member is separated from the first magnetic member along a second direction crossing the first direction. The first magnetic element includes a first element region, a first other-element region, and a first intermediate element region. The first magnetic member includes a first partial surface and a second partial surface.

Abstract: According to one embodiment, a magnetic sensor includes a base body, a magnetic member, and an element part. The base body includes a base body end portion. A direction from the base body toward the magnetic member is along a first direction. The element part includes a first magnetic element and a second magnetic element. A position of the first magnetic element and a position of the second magnetic element in a second direction are between a position of the base body end portion in the second direction and a position of the magnetic member in the second direction. The second direction crosses the first direction. A first distance along the second direction between the base body end portion and the element part is greater than a second distance along the second direction between the element part and the magnetic member.

Abstract: According to one embodiment, a magnetic sensor includes a base body including a base body end portion, a magnetic member, and an element part. A direction from the base body toward the magnetic member is along a first direction. The element part includes first and second magnetic elements. An orientation from the first magnetic element toward the second magnetic element is along a second direction crossing the first direction. A portion of the first magnetic element and a portion of the second magnetic element are between the base body and the magnetic member. A position in a third direction of an other portion of the first magnetic element and a position in the third direction of an other portion of the second magnetic element are between a position in the third direction of the base body end portion and a position in the third direction of the magnetic member.

Abstract: According to one embodiment, a magnetic sensor includes a first magnetic element, a second magnetic element, a third magnetic element located between the first and second magnetic elements in a first direction, a fourth magnetic element located between the third and second magnetic elements in the first direction, a first conductive member, a second conductive member, a third conductive member located between the first and second conductive members in the first direction, a fourth conductive member located between the third and second conductive members in the first direction, a first magnetic member, a second magnetic member, a third magnetic member located between the first and second magnetic members in the first direction, a fourth magnetic member located between the third and second magnetic members in the first direction, and a fifth magnetic member located between the third and fourth magnetic members in the first direction.

Abstract: According to one embodiment, a magnetic sensor includes a first element part. The first element part includes a first magnetic element, a first conductive member, a first magnetic member, and a second magnetic member. The first magnetic element includes a first magnetic layer, a first counter magnetic layer, and a first nonmagnetic layer provided between the first magnetic layer and the first counter magnetic layer. A direction from the first magnetic layer toward the first counter magnetic layer is along a first direction. The second magnetic member is separated from the first magnetic member along a second direction crossing the first direction. The first magnetic element includes a first element region, a first other-element region, and a first intermediate element region. The first magnetic member includes a first partial surface and a second partial surface.

Abstract: According to one embodiment, a magnetic sensor includes a first conductive part circuit, an alternating current circuit part, a first direct current circuit part, and a first element. The first conductive part circuit includes a first conductive part including a first conductive part end portion and a first conductive part other-end portion, and a first alternating current transfer element electrically connected in series with the first conductive part. The first conductive part circuit includes a first circuit end portion and a first circuit other-end portion. The alternating current circuit part is configured to apply an alternating current voltage between the first circuit end portion and the first circuit other-end portion. The first direct current circuit part is configured to apply a first direct current voltage to the first conductive part end portion and the first conductive part other-end portion. The first element includes a first magnetic layer.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a multilayer member, and a magnetic member. The multilayer member includes a plurality of magnetic layers and a plurality of nonmagnetic layers. The plurality of nonmagnetic layers is conductive. A direction from one of the plurality of magnetic layers toward an other one of the plurality of magnetic layers is aligned with a first direction from the multilayer member toward the magnetic member. One of the plurality of nonmagnetic layers is between the one of the plurality of magnetic layers and the other one of the plurality of magnetic layers. A thickness along the first direction of the magnetic member is not less than ½ of a thickness along the first direction of the multilayer member.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a plurality of magnetic layers, and a plurality of nonmagnetic layers. The plurality of nonmagnetic layers is conductive. A direction from one of the plurality of magnetic layers toward an other one of the plurality of magnetic layers is aligned with a first direction. One of the plurality of nonmagnetic layers is between the one of the plurality of magnetic layers and the other one of the plurality of magnetic layers. A first thickness along the first direction of the one of the plurality of magnetic layers is not less than ½ times a second thickness along the first direction of the one of the plurality of nonmagnetic layers.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a multilayer member, and a magnetic member. The multilayer member includes a plurality of magnetic layers and a plurality of nonmagnetic layers. The plurality of nonmagnetic layers is conductive. A direction from one of the plurality of magnetic layers toward an other one of the plurality of magnetic layers is aligned with a first direction from the multilayer member toward the magnetic member. One of the plurality of nonmagnetic layers is between the one of the plurality of magnetic layers and the other one of the plurality of magnetic layers. A thickness along the first direction of the magnetic member is not less than ½ of a thickness along the first direction of the multilayer member.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a multilayer member, and a magnetic member. The multilayer member includes a plurality of magnetic layers and a plurality of nonmagnetic layers. The plurality of nonmagnetic layers is conductive. A direction from one of the plurality of magnetic layers toward an other one of the plurality of magnetic layers is aligned with a first direction from the multilayer member toward the magnetic member. One of the plurality of nonmagnetic layers is between the one of the plurality of magnetic layers and the other one of the plurality of magnetic layers. A thickness along the first direction of the magnetic member is not less than ½ of a thickness along the first direction of the multilayer member.

Abstract: According to one embodiment, an electromagnetic wave attenuator includes a plurality of magnetic layers, and a plurality of nonmagnetic layers. The plurality of nonmagnetic layers is conductive. A direction from one of the plurality of magnetic layers toward an other one of the plurality of magnetic layers is aligned with a first direction. One of the plurality of nonmagnetic layers is between the one of the plurality of magnetic layers and the other one of the plurality of magnetic layers. A first thickness along the first direction of the one of the plurality of magnetic layers is not less than ½ times a second thickness along the first direction of the one of the plurality of nonmagnetic layers.