ZIB

1

Digitale Medien

Defect-induced redistribution of Fe- or Ti-implanted and annealed GaAs, InAs, GaP, and InP (1992)

Ullrich, H. ; Knecht, A. ; Bimberg, D. ; [weitere]

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

Journal of Applied Physics 72 (1992), S. 3514-3521

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The structural properties of GaAs, InAs, GaP, and InP implanted by Fe or Ti at 150 keV/400 keV and doses of 1012–1×1015 cm−2 and the depth distribution of the implants are comparatively studied before and after annealing with and without a Si3N4 cap. Results of Rutherford backscattering, x-ray double-crystal diffractometry, and secondary-ion mass spectroscopy experiments are presented. Fe redistributes strongly in all materials upon annealing, Ti does not redistribute at all. The driving force of redistribution of Fe is not classical diffusion but reaction with implantation-induced defects and stoichiometric imbalances. The actual defect chemistry of the as-implanted arsenides is found to be fundamentally different from the as-implanted phosphides since in the latter case the mass ratio of the constituents is much larger and the specific energy for amorphization is much lower. Consequently, redistribution of Fe in the phosphides and the arsenides differs qualitatively from each other.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.351429

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2

Digitale Medien

A simple technique for simultaneous fabrication of p+/n diodes and ohmic contacts on n-type InP (1992)

Baber, N. ; Scheffler, H. ; Ullrich, H. ; [weitere]

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

Journal of Applied Physics 71 (1992), S. 5699-5702

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Low leakage current p+/n step junctions with mechanically stable ohmic contacts to p+ layer are fabricated on n-InP wafers simultaneously by a simple procedure consisting of vacuum evaporation of Ni, Zn, and Au followed by a short heat treatment at 340 °C. Current-voltage and capacitance-voltage measurements, secondary ion mass spectroscopy, and deep level transient spectroscopy are employed to characterize the diodes fabricated and to understand their structure.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.351356

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3

Unbekannt

Menstrual Taboos Among Havik Brahmin Women: A Study of Ritual Change (1992)

Ullrich, H. E.

New York, N.Y. : Periodicals Archive Online (PAO)

Sex Roles. 26:1/2 (1992:Jan.) 19

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ISSN: 0360-0025

Thema: Klassische Archäologie

URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:v531-1992-026-01-000003

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4

Digitale Medien

Menstrual taboos among havik brahmin women: A study of ritual change (1992)

Ullrich, H. E.

Springer

Sex roles 26 (1992), S. 19-40

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ISSN: 1573-2762

Quelle: Springer Online Journal Archives 1860-2000

Thema: Sociologie

Notizen: Abstract This paper reports on changes in the beliefs and observance of menstrual taboos among Havik Brahmins in South India. Menstrual taboos have decreased in importance over the past 20 years as a woman's primary role has been redefined as a marital partner rather than as a bearer of children. When her function was as a bearer of children for the patrilineage, she was considered subject to biological rhythms and a threat to male ritual status. With increased education, professional opportunities, and increased marriage age for women, ritual status and male dominance have become less significant. Women are ritually less dangerous, less dependent on men, and transcend the biological rhythms that menstrual taboos symbolize.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00290123

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5

Digitale Medien

Human evolutionary research in eastern germany (1992)

Ullrich, H.

Springer

Human evolution 7 (1992), S. 31-39

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ISSN: 1824-310X

Schlagwort(e): Evolution of Man Origin of Human Society ; Bilzingsleben ; Interdisciplinary ; Working Group

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Human evolutionary research in Eastern Germany, limited in this paper to the origins and evolution of Pleistocene man, has mainly focused during the last decade on theoretical aspects of the evolution of man and human society from multiple and interdisciplinary perspectives. An interdisciplinary working group ‘Probleme der Menschwerdung’ was founded in 1977. About 30 specialists from various fields have discussed problems of the origins and evolution of man and human society under interdisciplinary aspects. The activities, difficulties and results of this cooperation will be outlined in this paper. There will also be given a progress report on the disciplinary initiated research on local sites as well as on general aspects and problems.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02436258

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