1978
DOI: 10.1139/p78-059
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The characterization of pure and niobium-doped crystals of strontium titanate using Hall, electrical conductivity, and optical absorption data

Abstract: A description is given of the heat treatment, under controlled conditions, of crystals of strontium titanate, both pure and niobium-doped, and of the effect of this treatment on the defect states in this material. Our analysis is based on evaluation of the results of electrical conductivity and Hall effect measurements, and those of optical absorption.

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Cited by 42 publications
(13 citation statements)
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“…0: 210Hz; +: 460Hz; x : 1110Hz; A : 2560Hz; 0: 6010Hz; 0 : 14010Hz crystals, obtained from the same company and reduced also at 900-1O0O"C, Perluzzo and Destry [13] report donor densities, deduced from Hall measurements, which are of the same order of magnitude as ours. Impedance measurements have also been made on sample 2, which had undergone a similar treatment as sample 1 except for the fact that it had not been etched in NaOH (see Table 1).…”
Section: Impedance Measurementssupporting
confidence: 82%
“…0: 210Hz; +: 460Hz; x : 1110Hz; A : 2560Hz; 0: 6010Hz; 0 : 14010Hz crystals, obtained from the same company and reduced also at 900-1O0O"C, Perluzzo and Destry [13] report donor densities, deduced from Hall measurements, which are of the same order of magnitude as ours. Impedance measurements have also been made on sample 2, which had undergone a similar treatment as sample 1 except for the fact that it had not been etched in NaOH (see Table 1).…”
Section: Impedance Measurementssupporting
confidence: 82%
“…[17][18][19] Since it is well known that extrinsic donors are exhausted at 77 K ͑Ref. 16͒ and even at 4.2 K, 20 Eq. ͑2͒ can be simplified to…”
Section: Defect Chemistrymentioning
confidence: 99%
“…Since it is well known that a high permittivity diminishes the mobility in the impurity scattering limited range ͑according to Ref. 20: ϰ Ϫ1 ͒, the high mobility at room temperature of highly ''doped'' samples may indicate a decreasing permittivity with an increasing lanthanum content.…”
Section: Highly Doped Ceramicsmentioning
confidence: 99%
“…D ONOR-DOPED single-crystal and polycrystalline SrTiO 3 have been investigated in the literature with emphasis on determination of material properties, such as conductivity, di-electric constant, and capacitance. [1][2][3][4][5][6][7][8][9][10][11][12][13] Niobium and lanthanum are among the commonly studied donors. Depending on processing conditions and on size similarity, niobium in its pentavalent state is assumed to occupy titanium sites, whereas lanthanum in its trivalent state occupies strontium sites, thereby behaving as donors.…”
Section: Introductionmentioning
confidence: 99%