UAIPD 10-0024

Dr. Yang-Ki Hong

Non-Rare Earth Nanomagnets

Current Problems• Motor applications require operational temps 160°C

while retaining 9800G in the market• Many permanent magnets are made of rare-earth

metals• Sources for the rare-earth metals are limited to a

few countries• Rare-earth permanent magnets have operational

temperatures above 150°C

• Magnetic exchange coupled core-shell nanomagnets without rare-earth metals – Core-shell nanomagnets (below 20 nanometers in diameter)

to replace rare-earths– Magnetic properties comparable to rare-earths (<20% loss in

magnetic energy) – Less expensive materials than current rare earths

Technology

• Uses no rare-earth materials• Higher Curie temperature than rare-

earth permanent magnets• Invented core-shell nanomagnets can

be used at 250°C

Advantages

• Dr. Yang-Ki Hong– E.A. Larry Drummond Endowed

Chair of Computer Engineering – Professor of Material Sciences Ph. D.

Program – More than 100 referred journal

papers– 13 patents awarded– 8 provisional US patents

• Departments – Center for Materials for Information

Technologies – Electrical and Computer

Engineering

Inventor

ykhong@eng.ua.edu

Office for Technology Transfer720 2nd Ct E

Tuscaloosa, AL 35401UAIPD 10-0024OTT@UA.edu

www.OTT.UA.edu