New paramagnetic defects in synthetic diamonds grown using nickel catalyst

Citation
Aj. Neves et al., New paramagnetic defects in synthetic diamonds grown using nickel catalyst, PHYSICA B, 274, 1999, pp. 651-654
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
0921-4526 → ACNP
Volume
274
Year of publication
1999
Pages
651 - 654
Database
ISI
SICI code
0921-4526(199912)274:<651:NPDISD>2.0.ZU;2-M
Abstract
We report four new EPR spectra found in high-pressure synthetic diamonds wi th high nitrogen content, grown using nickel, and annealed at 1600 degrees C. Analyzing the complex spectra around g approximate to 2 two trigonal and two orthorhombic defects, all with S = 1/2, were identified from the angul ar dependence and the different saturation behavior of the transitions. Bes ides optical and EPR investigations reveal several centers which have been previously ascribed to defects containing nickel and nitrogen. However, nit rogen is not involved in the new centers, since no evidence of an N-14 hype rfine structure could be found. Possible relations of the new defects with Ni are discussed. (C) 1999 Elsevier Science B.V. All rights reserved.