Defect Cluster Centers in MgO

Y. Chen; R. T. Williams; W. A. Sibley

doi:10.1103/PhysRev.182.960

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Defect Cluster Centers in MgO

Y. Chen, R. T. Williams^*, and W. A. Sibley

Solid State Division, Oak Ridge Hational Laboratory, operated by Union Carbide Corporation for the U. S. Atomic Energy Commission, Oak Ridge, Tenenssee 37830

^*Oak Ridge Associated Universities Undergraduate Research Participant from Wake Forest University, now at Princeton University, Princeton, N. J.

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Phys. Rev. 182, 960 – Published 15 June, 1969

DOI: https://doi.org/10.1103/PhysRev.182.960

Abstract

A study of the production and annealing of defect cluster centers in MgO single crystals has been undertaken. A comparison of the annealing of single negative-ion vacancies in neutron-irradiated, electron-irradiated, and Mg-additively colored samples is made. The results indicate that isolated negative-ion vacancies are not mobile below 900°C, and the annealing of these defects at lower temperatures in irradiated crystals is due to interstitial migration. The broad absorption bands at 352, 573, and 975 nm and the zero-phonon lines observed in neutron-irradiated crystals, previously proposed as due to $F$ -aggregate centers, are not observed in electron-irradiated and additively colored samples even after annealing. Therefore, there is some uncertainity whether these lines and/or bands are due to $F$ -aggregate centers.

References (18)

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[c1] F. P. Clarke, Phil. Mag. 2, 607 (1957)

[c2] J. E. Wertz, P. Auzins, R. A. Weeks, and R. H. Silsbee, Phys. Rev. 107, 1535 (1957)

[c3] J. E. Wertz, G. Saville, P. Auzins, and J. W. Orton, J. Phys. Soc. Japan 18, Suppl. II, 305 (1963)

[c4] J. E. Wertz, G. S. Saville, L. Hall, and P. Auzins, Proc. Brit. Ceramic Soc. 1, 59 (1964)

[c5] I. K. Ludlow and W. A. Runciman, Proc. Phys. Soc. (London) 86, 1081 (1965)

[c6] I. K. Ludlow, Proc. Phys. Soc. (London) 88, 763 (1966)

[c7] R. A. Shatas and J. D. Stettler, Bull. Am. Phys. Soc. 11, 811 (1966)

[c8] B. Henderson and R. D. King, Phil. Mag. 13, 1149 (1966)

[c9] R. D. King and B. Henderson, Proc. Phys. Soc. (London) 89, 153 (1966)

[c10] J. C. Kemp, W. M. Ziniker, and J. A. Glaze, Phys. Letters 22, 37 (1966)

[c11] W. A. Sibley and Y. Chen, Phys. Rev. 160, 712 (1967)

[c12] M. Nakagawa and K. Ozawa, J. Phys. Soc. Japan 24, 96 (1968)

[c13] E. B. Hensley, W. C. Ward, B. P. Johnson, and R. L. Kroes, Phys. Rev. 127, 1227 (1968)

[c14] B. Henderson and J. E. Wertz, Advan. Phys. 17, 749 (1968)

[c15] Y. Chen, W. A. Sibley, F. D. Srygley, R. A. Weeks, E. B. Hensley, and R. L. Kroes, J. Phys. Chem. Solids 29, 863 (1968)

[c16] W. D. Compton and H. Rabin, in Solid State Physics, edited by F. Seitz and D. Turnbull (Academic Press Inc., New York, 1964), Vol. 16

[c17] R. R. Tucker, Oak Ridge National Laboratory Report No. ORNL-TM-1583, 1966 (unpublished)

[c18] W. A. Sibley, J. L. Kolopus, and W. C. Mallard, Phys. Status Solidi 31, 223 (1969)

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Defect Cluster Centers in MgO

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