PIs: R. C. Wetherhold and Harsh Deep Chopra, State University of New York at Buffalo Proposal Number: 0099830 Proposal Title: Magneto-Elastic Interactions in Giant Magnetostriction Multilayers for Adaptive Micro-Systems Transducers Project Abstract: Research is focused on high strain susceptibility and low switching field "giant" magnetostriction of Tb-Fe or Sm-Fe films, which are sandwiched between high magnetization soft magnets, such as Fe-Co. Due to inter-layer interactions between stress and magnetization in these multilayers, understanding and controlling favorably the magneto-elastic coupling is a key objective of these studies. An overall energy function is being developed for the combination of all magnetic, mechanical, and coupling energies, in order to understand the magneto-elastic coupling. Multilayers are being sputter deposited as a function of layer thickness and number of bilayers, with post-deposition stress annealing to optimize their magneto-elastic behavior. Films are being characterized for their magnetic structure and microstructure using analytical electron microscopy, x-ray diffraction, and scanning probe microscopy. Optimized films are being tested as adaptive components of micro-electro-mechanical systems (MEMS) and Bio-MEMS. In addition to the richness of new phenomena that are being observed due to magneto-elastic interactions, these studies impact significantly the rapidly evolving fields of MEMS and bio-MEMS. Examples include highly efficient micro-switches, laser beam deflectors, fluid jet deflectors, valves, ultrasonic motors, micro-grippers and micro-pumps, with high dynamic response. Educational impact includes active training and participation of graduate and undergraduate students, as well as high school students from Buffalo area inner city high schools.

Agency
National Science Foundation (NSF)
Institute
Division of Civil, Mechanical, and Manufacturing Innovation (CMMI)
Application #
0099830
Program Officer
Shih-Chi Liu
Project Start
Project End
Budget Start
2001-09-01
Budget End
2005-08-31
Support Year
Fiscal Year
2000
Total Cost
$199,732
Indirect Cost
Name
Suny at Buffalo
Department
Type
DUNS #
City
Buffalo
State
NY
Country
United States
Zip Code
14260