Sensor including a structure body having a deforming portion and a first sensing element provided at the defroming portion and microphone, blood pressure sensor, and touch panel including same

A sensor, comprising:

• a structure body including a deforming portion, the deforming portion being deformable;
• and
• a first sensing element provided at the deforming portion,
• the first sensing element including first to fourth magnetic layers and a first intermediate layer,
• the first magnetic layer being provided between the second magnetic layer and the third magnetic layer,
• the fourth magnetic layer being provided between the first magnetic layer and the third magnetic layer,
• the first intermediate layer being provided between the second magnetic layer and the first magnetic layer,
• the third magnetic layer including at least one of a first material or a second material, the first material including at least one selected from the group consisting of Ir—Mn, Pt—Mn, Pd—Pt—Mn, and Ru—Rh—Mn, the second material including at least one of CoPt (a ratio of Co being not less than 50 at. % and not more than 85 at. %), (CoxPt100-x)100-yCry (x being not less than 50 at. % and not more than 85 at. %, and y being not less than 0 at. % and not more than 40 at. %), or FePt (a ratio of Pt being not less than 40 at. % and not more than 60 at. %),
• a crystallinity of at least a portion of the fourth magnetic layer being higher than a crystallinity of the first magnetic layer.