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1

Digitale Medien

Importance of sample preheating in oxidation of GexSi1−x (1992)

Liu, W. S. ; Lee, E. W. ; Nicolet, M-A. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 71 (1992), S. 3626-3627

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Wet thermal oxidation at 1000 °C of a 470-nm-thick epitaxial Ge0.36Si0.64 layer on (100)Si produces oxides of different composition depending on the details of the oxidation procedure. When a cold sample is directly exposed to the hot steam, the surface layer of the oxide contains both Ge and Si. Only SiO2 forms if a preheated sample is exposed to the hot steam. The effect is not present for dry oxidation and is attributed to the known enhancement of the wet oxidation rate by Ge, coupled with the transient warm up of a sample when it is immersed cold in hot steam.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.350922

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2

Digitale Medien

Wet oxidation of GeSi at 700 °C (1992)

Liu, W. S. ; Lee, E. W. ; Nicolet, M-A. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 71 (1992), S. 4015-4018

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: About 500-nm-thick films of Ge0.36Si0.64 and Ge0.28Si0.72 grown epitaxially on (100)Si have been oxidized at 700 °C in wet ambient. A uniform GexSi1−xO2 oxide layer forms with a smooth interface between it and the unoxidized GexSi1−x layer below. The composition and structure of that layer remains unchanged as monitored by backscattering spectrometry or cross-sectional transmission electronic microscopy. The oxide of both samples grows as square root of oxidation duration. The parabolic rate constant increases with the Ge content and is larger than that for wet oxidation of pure Si at the same temperature. The absence of a regime of linear growth at this relatively low temperature indicates a much enhanced linear rate constant.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.350847

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3

Digitale Medien

Re-entrant Hysteresis Loop and Multistable Ferrites (1965)

GLAISTER, R. M. ; LEE, E. W.

[s.l.] : Nature Publishing Group

Nature 208 (1965), S. 67-68

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] We have now prepared ferrite toroids with multistable remanent states in addition to re-entrant loops, and propose an explanation both for these effects and for the asymmetry resulting from a unidirectional field anneal. The material comprises Co2+0.15 Fe2+0.85 Fe3+2O4 and is sintered under ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/208067a0

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4

Digitale Medien

Direct Measurement of the Velocity of Propagation of a Ferromagnetic Domain Boundary in ‘Perminvar’ (1958)

LEE, E. W. ; CALLABY, D. R.

[s.l.] : Nature Publishing Group

Nature 182 (1958), S. 254-255

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] All these measurements are indirect in so far as they are obtained by applying a sudden change in field and recording the value of dB/dt from the e.m.f. induced in a secondary coil. The wall velocity is then determined from the observed maximum value of the dB/dt pulse (or its integrated value) and ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/182254a0

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5

Digitale Medien

Magnetic and electrical properties of 77-14-5-4 wt % Ni-Fe-Cu-Mo and related alloys (1966)

Jackson, R. C. ; Lee, E. W.

Springer

Journal of materials science 1 (1966), S. 362-366

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ISSN: 1573-4803

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract A study has been made of a series of alloys centred on the composition 77 wt % nickel, 14 wt % iron, 5 wt % copper, 4 wt % molybdenum, in which the nickel-to-iron ratio has been varied. Measurements of electrical resistivity and magnetostriction show significant changes after heat treatment. These are ascribed to the formation of local atomic order. No definite evidence for long-range ordering has been observed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00549934

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