ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The experimental conditions have been determined whereby it is possible, in a closed system, to distil off volatile impurities from an ingot of InSb, and subsequently pass at least 10 to 15 zones through the ingot, whilst constantly maintaining a single crystal structure of a chosen crystallographic orientation. It has been found that preservation of singularity and control of dislocation density can be achieved by selection of: seed orientation and polarity; provision of a containing boat which is not wetted by InSb; careful purification of gas ambient; and the establishment of the correct conditions of temperature gradient at the crystal growing interface. A minimum concentration of ∼3×1013 extrinsic electrons/cm3 was found in uniform specimens substantially uncompensated by volatile impurities. The work provides good evidence that this carrier concentration is not due to Te. The maximum electron mobility at 77° K that could be reproducibly obtained in uniform specimens was 7.5×105 cm2/V sec.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00549717
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