Korea Institute of Machinery & Materials

Woon-Ha Yoon

Dong-Soo Park

Jungho Ryu

Jong-Woo Kim

A piezoelectric fiber composite and a magnetoelectric laminate composite including the same are disclosed. The piezoelectric fiber composite includes a first protective layer having a first electrode, a second protective layer having a second electrode, and a piezoelectric fiber layer formed between the first and the second electrode and having piezoelectric fibers arranged in the longitudinal direction of the composite, wherein the piezoelectric fibers include a single-crystal piezoelectric material and are configured such that a &#x3c;011&#x3e; direction of the single crystal is identical to a thickness direction of the composite and a &#x3c;001&#x3e; direction of the single crystal is identical to a longitudinal direction of the composite, thus exhibiting superior piezoelectric strain properties and sensing properties. Also, the magnetoelectric laminate composite includes the piezoelectric fiber composite and a magnetostrictive layer including a magnetostrictive material such as nickel (Ni) or Metglas (FeBSi alloy), thus ensuring significantly improved magnetoelectric properties.

Single-crystal piezoelectric fiber composite and magnetoelectric laminate composite including the same

Disclosed is a magnetoelectric (ME) composite including both a piezoelectric material and a magnetostrictive material, wherein a piezoelectric single crystal material having high piezoelectric properties is used as the piezoelectric material, and a metal magnetostrictive material having high magnetostrictive properties is used as the magnetostrictive material, thus achieving an ME composite having a layered structure via adhesion. When the ME layered composite is manufactured such that a &#x3c;011&#x3e; crystal orientation of the piezoelectric single crystal material is set to a thickness direction, high ME voltage coefficient, which is at least doubled, compared to a conventional &#x3c;001&#x3e; crystal orientation, can be obtained, and such an effect is further maximized in the resonance of the composite.

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Gyeongsangnam-do, South Korea

Woon-Ha Yoon