ETCHING AND X-RAY TOPOGRAPHY OF FLUX-GROWN MAGNETIC GARNETS

被引:7
作者
BELT, RF
机构
[1] Airtron Division, Litton Precision Products Inc., Morris Plains
关键词
D O I
10.1063/1.1657826
中图分类号
O59 [应用物理学];
学科分类号
摘要
Internal growth defects of high-quality garnet crystals were studied by selective etchants and Lang x-ray transmission topography. Terminal growth sections contained the fewest defects and dislocation densities were 10 2-104/cm2. Internal sections revealed both randomly dispersed etch pits and linear arrays. The latter were frequently found in the form of parallel grids. Results indicated that {100}, {111}, {411}, and {105} were the defective planes. X-ray topographs verified that parallel linear faults are present in crystals on these same planes. The faults are not dislocation lines but tubular structural deviations caused by flux precipitation or other compositional changes. The origin and arrangement of the internal faults are related to fluctuations of the crystal growth rate. The rate changes can be initiated by small thermal gradients in the solution. © 1969 The American Institute of Physics.
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页码:1644 / +
页数:1
相关论文
共 25 条
[1]  
BARRETT CS, 1952, STRUCTURE METALS, P42
[2]   X-RAY-DIFFRACTION TOPOGRAPHIC STUDIES OF MAGNETIC-DOMAIN CONFIGURATIONS IN TERBIUM IRON GARNET [J].
BASTERFI.J ;
PRESCOTT, MJ .
JOURNAL OF APPLIED PHYSICS, 1967, 38 (08) :3190-&
[3]  
BASTERFIELD J, 1968, J MATER SCI, V3, P33
[4]   TEMPERATURE FLUCTUATIONS AND STRIATIONS IN FLUX CRYSTAL GROWTH [J].
CHASE, AB ;
WILCOX, WR .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1967, 50 (06) :332-&
[5]   EFFECT OF MGO ON CRYSTAL-GROWTH DEFECTS AND OPTICAL ABSORPTION OF FLUX-GROWN IN2O3 [J].
CHASE, AB ;
TIPPINS, HH .
JOURNAL OF APPLIED PHYSICS, 1967, 38 (06) :2469-&
[6]  
Czochralski J, 1917, Z PHYS CHEM-STOCH VE, V92, P219
[7]  
Donnay JDH, 1937, AM MINERAL, V22, P446
[9]  
HANKE I, 1962, Z ANGEW PHYS, V14, P465
[10]  
HANKE I, 1962, Z ANGEW PHYS, V14, P557