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Oxygen Deficient Solutions to Prepare Orthoferrite Single Crystals

IP.com Disclosure Number: IPCOM000073879D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Plaskett, TS: AUTHOR [+2]

Abstract

Orthoferrite crystals are pulled from liquids which are made oxygen deficient by the additions of Gd and Fe metals to the orthoferrite composition, and by the control of the oxygen partial pressure over the melt. The Gd-Fe additions and oxygen pressures in the 10/-5/ -10/-10/ atm range result in compositions which are liquids at 1300-1400degrees C, from which orthoferrite is the primary phase to crystallize. This permits the use of platinum crucibles at a total pressure of one atm. Further, the liquid composition and liquidus temperature can be controlled by adjusting the oxygen partial pressure. A major advantage of this technique is that the oxygen content of the solution is maintained constant during growth, which permits pulling the whole solution.

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Oxygen Deficient Solutions to Prepare Orthoferrite Single Crystals

Orthoferrite crystals are pulled from liquids which are made oxygen deficient by the additions of Gd and Fe metals to the orthoferrite composition, and by the control of the oxygen partial pressure over the melt. The Gd-Fe additions and oxygen pressures in the 10/-5/ -10/-10/ atm range result in compositions which are liquids at 1300-1400degrees C, from which orthoferrite is the primary phase to crystallize. This permits the use of platinum crucibles at a total pressure of one atm. Further, the liquid composition and liquidus temperature can be controlled by adjusting the oxygen partial pressure. A major advantage of this technique is that the oxygen content of the solution is maintained constant during growth, which permits pulling the whole solution.

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