Ac Hall and Magnetostrictive Effects in Photoconducting Alkali Halides

J. Ross Macdonald; John E. Robinson

doi:10.1103/PhysRev.95.44

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Ac Hall and Magnetostrictive Effects in Photoconducting Alkali Halides

J. Ross Macdonald^* and John E. Robinson

Chemistry Division, Argonne National Laboratory, Lemont, Illinois

^*Then on leave to Argonne National Laboratory from Armour Research Foundation. Now at Texas Instruments, Inc., 6000 Lemmon Avenue, Dallas.

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Phys. Rev. 95, 44 – Published 1 July, 1954

DOI: https://doi.org/10.1103/PhysRev.95.44

Abstract

This paper reports the results of room-temperature measurements of the Hall and magnetoresistive effects for single-crystal potassium bromide containing a low concentration of $F$ centers. Measurements were carried out with strong steady illumination in the $F$ -absorption band by means of a new ac technique which avoids space-charge polarization effects. The current carriers were found to be negative in sign with a Hall mobility of 12.5 ${cm}^{2}$ /volt-sec and are undoubtedly electrons photoexcited from $F$ centers. Their maximum concentration was of the order of $10^{10}$ ${cm}^{- 3}$ . The mobility was found to be substantially independent of light intensity and signal frequency over the limited ranges investigated. Transverse magnetoresistive effects of both positive and negative sign were also observed. Finally, a phenomenological discussion of the experimental results is given.

References (20)

H. Lenz, Ann. Physik 77, 449 (1925) ibid.82, 775 (1927)
J. Evans, Phys. Rev. 57, 47 (1940)
N. F. Mott and R. W. Gurney, Electronic Processes in Ionic Crystals (Clarendon Press, Oxford, 1948), second edition, p. 169
J. R. Macdonald, Phys. Rev. 85, 381 (1952) ibid.90, 364 (1953)
J. R. Macdonald, Phys. Rev. 92, 4 (1953)
E. M. Pell and R. L. Sproull, Rev. Sci. Instr. 23, 548 (1952)
[3], p. 147
Omitted endnote
Omitted endnote
Omitted endnote
J. R. Macdonald, Rev. Sci. Instr. 25, 144 (1954)
Isenberg, Russell, and Greene, Rev. Sci. Instr. 19, 685 (1948)
J. R. Macdonald (submitted to J. Chem. Phys.)
F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1940), p. 184
Frohlich, Pelzer, and Zienau, Phil. Mag. 41, 221 (1950)
Lee, Low, and Pines, Phys. Rev. 90, 297 (1953)
F. E. Low and D. Pines, Phys. Rev. 91, 193 (1953)
H. Frohlich and N. F. Mott, Proc. Roy. Soc. (London) A171, 496 (1939)
A. H. Wilson, The Theory of Metals (Cambridge University Press, Cambridge, 1953), second edition, Secs. 8.51 and 8.64
[3], p. 104 [14], p. 558

[c1] H. Lenz, Ann. Physik 77, 449 (1925) ibid.82, 775 (1927)

[c2] J. Evans, Phys. Rev. 57, 47 (1940)

[c3] N. F. Mott and R. W. Gurney, Electronic Processes in Ionic Crystals (Clarendon Press, Oxford, 1948), second edition, p. 169

[c4] J. R. Macdonald, Phys. Rev. 85, 381 (1952) ibid.90, 364 (1953)

[c5] J. R. Macdonald, Phys. Rev. 92, 4 (1953)

[c6] E. M. Pell and R. L. Sproull, Rev. Sci. Instr. 23, 548 (1952)

[c7] [3], p. 147

[c8] Omitted endnote

[c9] Omitted endnote

[c10] Omitted endnote

[c11] J. R. Macdonald, Rev. Sci. Instr. 25, 144 (1954)

[c12] Isenberg, Russell, and Greene, Rev. Sci. Instr. 19, 685 (1948)

[c13] J. R. Macdonald (submitted to J. Chem. Phys.)

[c14] F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1940), p. 184

[c15] Frohlich, Pelzer, and Zienau, Phil. Mag. 41, 221 (1950)

[c16] Lee, Low, and Pines, Phys. Rev. 90, 297 (1953)

[c17] F. E. Low and D. Pines, Phys. Rev. 91, 193 (1953)

[c18] H. Frohlich and N. F. Mott, Proc. Roy. Soc. (London) A171, 496 (1939)

[c19] A. H. Wilson, The Theory of Metals (Cambridge University Press, Cambridge, 1953), second edition, Secs. 8.51 and 8.64

[c20] [3], p. 104 [14], p. 558

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Ac Hall and Magnetostrictive Effects in Photoconducting Alkali Halides

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