Electromagnetic wave attenuator and electronic device

An electromagnetic wave attenuator, comprising:

• a stacked member including a first planar portion,
• the first planar portion including a first stacked body,
• the first stacked body including a plurality of first 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 being along a first direction,
• one of the first non-magnetic layers being 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 including an amorphous region, and
• the one of the first magnetic layers and the other one of the first magnetic layers including a crystal region,
• wherein
• the stacked member further includes a first side surface portion,
• the first side surface portion includes a first side surface stacked body,
• the first side surface stacked body includes a plurality of first side surface non-magnetic layers including Cr and Ti, and a plurality of first side surface magnetic layers,
• a direction from one of the first side surface magnetic layers to an other one of the first side surface magnetic layers is along a second direction crossing the first direction,
• one of the first side surface non-magnetic layers is between the one of the first side surface magnetic layers and the other one of the first side surface magnetic layers,
• the one of the first side surface non-magnetic layers includes an amorphous region, and
• the one of the first side surface magnetic layers and the other one of the first side surface magnetic layers include a crystal region.