Oakland University

Gopalan Srinivasan

Devices for modification of a microwave signal using a magnetically saturated ferrite magnetoelectric device with electrical control are disclosed. The device is useful for microwave resonators, band pass filters, delay lines and phase shifters.

Ferrite-piezoelectric microwave devices

An improved magnetoelectric composite which incorporates LaSrMn or LaCaMn oxides as a magnetostrictive composition are described. The magnetostrictive composition preferably has the formula LaSrMnOor LaCaMnO. The composites preferably have a magnetostrictive layer joined to a piezoelectric layer. The composites are useful for sensors, read-heads, storage media and high frequency transducer devices.

Magnetoelectric effects of magnetostrictive and piezoelectric layered composites

Magnetoelectric multilayer composites comprising alternate layers of a bimetal ferrite wherein one of the metals is zinc and a piezoelectric material for facilitating conversion of an electric field into a magnetic field or vice versa. The preferred composites include cobalt, nickel, or lithium zinc ferrite and PZT films which are arranged in a bilayer or in alternating layers, laminated, and sintered at high temperature. The composites are useful in sensors for detection of magnetic fields (); sensors for measuring rotation speed, linear speed, or acceleration; read-heads in storage devices by converting bits in magnetic storage devices to electrical signals; magnetoelectric media for storing information; and high frequency devices for electric field control of magnetic devices or magnetic field control of electric devices.

Magnetoelectric multilayer composites for field conversion

Magnetoelectric multilayer composites comprising alternate layers of a bimetal ferrite wherein one of the metals is zinc and a piezoelectric material for facilitating conversion of an electric field into a magnetic field or vice versa. The preferred composites include cobalt, nickel, or lithium zinc ferrite and PZT films which are arranged in a bilayer or in alternating layers, laminated, and sintered at high temperature. The composites are useful in sensors for detection of magnetic fields; sensors for measuring rotation speed, linear speed, or acceleration; read-heads in storage devices by converting bits in magnetic storage devices to electrical signals; magnetoelectric media for storing information; and high frequency devices for electric field control of magnetic devices or magnetic field control of electric devices.

Growing community of inventors

Rochester, MI, United States of America

Gopalan Srinivasan