Magnetoelectric Devices and Methods of Using Same
The operational frequency of existing magnetoelectric materials having metallic or ceramic magnetostrictive materials and ceramic piezoelectric materials may be limited to a few kilohertz due to the presence of eddy-current losses in the metallic magnetostrictive phase. Further, these materials may be difficult to machine and fabricate due to their brittleness. Additionally, it may be difficult to tailor and optimize the properties (i.e., magnetoelectric voltage coefficient .alpha..sub.E, etc.) of the devices. This invention provides a magnetoelectric element including at least one set of alternative piezoelectric layer and magnetostrictive composite layer. The magnetostrictive composite layer includes at least one magnetostrictive material dispersed in first concentrated zones within a first polymer matrix, wherein all of said concentrated zones are orientated along a first direction. It is found that the conversion efficiency (i.e., .alpha..sub.E) varies in accordance with applied magnetic control field H.sub.control.
Patent Number: US7199495B2
Application Number: US2004814265A
Inventor: Or, Siu Wing | Chan Wong, Helen Lai Wa
Priority Date: 1 Apr 2004
Priority Number: US7199495B2
Application Date: 1 Apr 2004
Publication Date: 3 Apr 2007
IPC Current: H01L004106 | H01L004116 | H02N000200
US Class: 310026 | 310311
Assignee Applicant: The Hong Kong Polytechnic University
Title: Magnetoelectric devices and methods of using same
Usefulness: Magnetoelectric devices and methods of using same
Summary: For magnetoelectric device.
Novelty: Magnetoelectric element for magnetoelectric device, includes magnetostrictive composite layer comprising magnetostrictive material(s) dispersed in concentrated zones within polymer matrix
化工/材料
化工/材料应用
OR Siu-wing
CHAN WONG Lai -wa Helen
美国
