Research Papers in Physics and Astronomy


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United States Patent No.: US 7,358,846 B2
Doudin, Date of Patent: Apr. 15, 2008


The present invention provides systems and method utilizing magnetoelectric materials such as Cr2O3 to construct tunneling magnetoresistence andor giant magnetoresistence structures for memory andor logical circuitry. An applied voltage differential induces a magnetic moment in the magnetoelectric material, which in turn tunes an exchange field between it and one or more adjacent ferromagnetic layers. The resulting magnetoresistence of the device may be measured. Devices in accordance with the present invention may be utilized for MRAM read heads, memory storage cells andor logical circuitry such as XOR or NXOR devices.

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