Usami, Teruo and Toyoda, Shin and Bahadur, Harish and Srivastava, A. K. and Nishido, H. (2009) Characterization of the E1′ center in quartz: Role of aluminum hole centers and oxygen vacancies. Physica B: Condensed Matter, 404 (20). pp. 3819-3823. ISSN 0921-4526

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Abstract

The growth of E1′ centers in a variety of natural and synthetic quartz crystals has been investigated by employing the electron spin resonance technique. It has been reported that the growth of E1′ centers, formed by irradiation and subsequent annealing at 300 °C for 15 min, scale with the concentration of the aluminum hole center, [AlO4]0, till a limit. Later, the E1′ centers show saturation even when the [AlO4]0-center continues to grow. For quartz with low efficiency of the formation of [AlO4]0-center or irradiated with low accumulated doses, the intensity of E1′ center was small where not all oxygen vacancies are converted to the E1′ center. Thus, besides the availability of a number of oxygen vacancy sites, the number of holes released from the [AlO4]0-center plays an important role in the formation of E1′ centers in quartz.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Quartz; E1′ center; Oxygen vacancy; Aluminum hole center; Electron spin resonance; Crystalline quartz;
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	16 Aug 2012 06:40
Last Modified:	16 Aug 2012 06:40
URI:	http://npl.csircentral.net/id/eprint/419

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