1. Combinatorial study of magnetic metallic alloys
Example: ferromagnetic shape memory alloys
Ferromagnetic
SMA
Takeuchi group, UMD
funded by ONR
Magnetization mapping
Using scanning SQUID
100 -
150
emu
/cc 50 70 30 40 10 20 15 25 35 45 60
2.50e+007 1 2 3 4 5 6 7 8 9 10 Ga Ni Mn - 50
100
150
200
Austenite start temp ( C)
250
M (
emu
/cc)
Screening for shape memory
alloys using
micromachined
cantilever libraries

2. Combinatorial pulsed laser deposition
of metal oxide thin films Takeuchi group, UMD
Discrete combinatorial library
Combinatorial PLD Flange
X,Y- shutters/
masks 1”
Heater
plate
Drive chain
Each sensor element is made of a different metal oxide.
Different aperture patterns and masks are used to fabricate
combinatorial libraries and spreads of different designs.
This library is an example of an Electronic Nose. .
MgZnO composition spread
Composition Spread of (Ba,Sr)TiO3
Dielectric constant vs composition
measured by microwave microscopy
Continuous phase
evolution is observed.
Continuous bandgap
tuning is accomplished.
200
400
600
800
1000
0.0
0.2
0.4
0.6
0.8
1.0
Dielectric constant
0.95 GHz
2.85 GHz
4.95 GHz
0.1
0.3
0.5
Loss tangent
funded by
ONR and
NSF
Pure ZnO
Mg (mol%) 40 80 30 35
MgO 40 2 q
(degree) 45 50
BaTiO 3
x in Ba x Sr 1 -
TiO
SrTiO
Scanning x-ray microdiffraction of MgZnO spread