USA As Represented by Secretary of the Navy

University System of Maryland

Margo Staruch

Peter Finkel

Lynn T Antonelli

Fletcher A Blackmon

Ichiro Takeuchi

Jeffrey W Baldwin

Alex E Moser

Bernard R Matis

Ronald Lacomb

Steven P Bennett

Konrad Bussmann

Julie Lacomb

Meredith Metzler

Thomas Mion

Norman Gottron

William Zappone

Huilong Hou

The present invention provides a magnetoelectric multiferroic, time-variable magnetic field transmitter based upon a resonant structure capable of enhancing the transmitted field at the structural resonant frequency. This transmitter utilizes a single crystal piezoelectric as the source of mechanical excitations with a laminated transduction element to reduce eddy currents in the magnetostrictive material thereby reducing losses at higher frequencies. The structural resonance frequency can be tuned by adjusting the size of the masses, position and strength of bias magnets, pre-stress conditions and physical parameters of the transduction column elements.

Portable resonant multiferroic magnetoelectric antenna for ULF/VLF communication

A cooling system employs at least one composite elastocaloric device. Each composite device has a first member with a first material and a second member with an elastocaloric material. The first material increases in size in response to an applied electric or magnetic field and returns to its prior size upon removal of the applied electric or magnetic field. The first and second members are mechanically coupled together such that the increase in size of the first material applies a stress to the elastocaloric material and the return of the first material to its prior size releases said stress, thereby causing the elastocaloric material to absorb heat.

Systems and methods for cooling using a composite elastocaloric device

A high-sensitivity and ultra-low power consumption magnetic sensor using a magnetoelectric (ME) composite comprising of magnetostrictive and piezoelectric layers. This sensor exploits the magnetically driven resonance shift of a free-standing magnetoelectric micro-beam resonator. Also disclosed is the related method for making the magnetic sensor.

Ultra-low power magnetoelectric magnetic field sensor

Described herein is the use of large phase transformational strain in relaxor ferroelectric single crystals for broadband sound generation. The technique exploits the thermo-optical triggering and thus an opto-acoustic effect of ferroelectric phase transformation piezocrystals under mechanical bias conditions.

Thermo-optical method of phrase transformational transduction

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Alexandria, VA, United States of America

Margo Staruch