(Lu,La,Y,Ca)/sub 3/(Ge,Fe)/sub 5/O/sub 12/: a temperature compensated high mobility bubble garnet

Conference · Thu Jan 01 04:00:00 EST 1976 · AIP (Am. Inst. Phys.) Conf. Proc.; (United States)

OSTI ID:7125088

Hiskes, R

The (Lu,La,Y,Ca)/sub 3/(Ge,Fe)/sub 5/O/sub 12/ garnet system is useful for practical high speed bubble devices because it contains no rare earth ions which contribute to damping; yet a combination of growth and stress induced anisotropy provides a q greater than 7 for 6 ..mu..m diameter bubbles. The partial substitution of Lu/sup 3 +/ on octahedral sites allows manipulation of the Neel temperature between 180/sup 0/C and 200/sup 0/C, with attendant H/sub T/ adjustment to -0.20 percent//sup 0/C over a -20/sup 0/C to +120/sup 0/C temperature range to match a particular barium ferrite bias magnet. Defect free films of this composition grown by standard LPE techniques in a PbO-B/sub 2/O/sub 3/ solvent in the temperature range 930 to 1000/sup 0/C exhibit a coercive force less than 0.4 Oe and bubble mobilities greater than 2600 cm/s-Oe as measured by the bubble translation technique. The magnetization can be adjusted as low as 125 Gauss for a 6 ..mu..m bubble to 190 Gauss for a 4 ..mu..m bubble, which lowers the pulse power requirements for bubble devices by a factor of four compared to that needed by competing Sm containing garnets.

• Research Organization: Hewlett-Packard Labs., Palo Alto, CA
• OSTI ID: 7125088
• Conference Information: Journal Name: AIP (Am. Inst. Phys.) Conf. Proc.; (United States) Journal Volume: 34
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
CALCIUM COMPOUNDS
CRYSTAL GROWTH
FERRITE GARNETS
GERMANIUM COMPOUNDS
LANTHANUM COMPOUNDS
LUTETIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MINERALS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRESSES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS