Gadolinium and Aluminum Substituted Garnet
                      
Material Type
                      
Saturation Magnetization
(4p Ms) gauss
Line Width (DH) oersteds @ -3dB *
g-effective*
Dielectric Constant (e')
Dielectric Loss Tangent *
Curie Temp (ºC)
Spin Wave Line Width DHK (oe)*
CG-1400GA
1400
<40
1.98
15.6
0.00015
270
2.9
CG-1200GA
1200
<40
1.99
15.4
0.00015
255
3.5
CG-1000GA
1000
<45
2.00
15.2
0.00015
235
4.1
CG-800GA
800
<45
2.00
15.0
0.00015
220
5.1
CG-700GA
700
<45
2.01
14.8
0.00015
210
5.3
CG-550GA
550
<50
2.02
14.6
0.00015
185
5.6

* measured at 9.0 GHz

Composition

[Y3-xGdx] [Fe2] [Fe3-yAly] O12

Types CG-1400GA through CG-550GA are yttrium-gadolinium-aluminum-iron garnets in order of increased gadolinium substitution.

Characteristics and Applications

These garnet materials have properties found in both gadolinium substituted and aluminum substituted garnets. The aluminum substitution provides a wide range of saturation magnetization. The gadolinium substitution increases the microwave power handling ability and improves the temperature stability. Improved broadband circulator characteristics that specify minimum insertion loss are attainable because of the low dielectric loss tangent of these materials. The frequency range of these materials is from L-band through C-band for non-resonant devices.
















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