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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1964-1970 
    ISSN: 0392-6737
    Keywords: Electron paramagnetic resonance and relaxation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Gli ioni di sostituzione Co2+ e Mn2+ in due diverse posizioni nel Cd nel composto CsCdCl3 sono state studiati usando la risonanza paramagnetica elettronica. L'occupazione preferenziale, Co2+ nel sito CdII, Mn2+ nel sito CdI, è discussa in termini di argomenti di simmetria della chimica dei cristalli.
    Abstract: Резюме Используя электронный парамагнитный резонанс, в соединении CsCdCl3 исследуются местоположения ионов замещения Co2+ и Mn2+ в двух различных положениях Cd. В терминах кристалло-химической симметрии обсуждается предпочтительное расположение Co2+ в положении CdII и Mn2+ в положении CdI.
    Notes: Summary Substitutional Co2+ and Mn2+ ions at the two different Cd sites in the compound CsCdCl3 have been studied by using electron paramagnetic resonance. The preferential occupation, Co2+ in the CdII site, Mn2+ in the CdI site, is discussed in terms of crystallochemical symmetry arguments.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1767-1774 
    ISSN: 0392-6737
    Keywords: Impurity and defect absorption in solids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto I centri microscopici di diffusione in cristalli accresciuti di AgGaS2 sono stati studiati col microscopio ottico e col microscopio elettronico a scansione. I difetti consistono in placchette rettangolari che giacciono nei piani (100) e (010). La loro dimensione maggiore (fino a 100 μm) era parallela alla direzione [001]. La loro dimensione minore è parallela alle direzioni [100] e [010], rispettivamente. I centri di diffusione erano usualmente spessi alcune frazioni di micrometro e non sembravano avere una composizione diversa dalla fase della matrice, secondo risultati dell'analisi a disperisione di energia. I difetti possono essere eliminati per ricottura in Ag2S o spegnimento da temperature elevate, il che suggerisce che i difetti possono essi stessi consistere in una regione a due fasi, parte della quale dovrebbe essere ricca di Ga2S3, dove particelle della seconda fase a barretta o a placchetta sono inglobate nella matrice. La quantità e le dimensioni di questa seconda fase rendono difficile un'analisi definitiva della composizione.
    Abstract: Резюме Используя оптическую и электронную сканируюшую микросконию, исследуются микроскопические центры рассеяния в AgGaS2. Дефекты состоят из прямоугольных пластинок, расположенных в плоскостях (100) и (010). Их наибольший размер (до 100 мкм) параллелен направлению [001]. Их наименьший размер соответственно располозен параллельно направлениям [100] и [010]. Центры рассеяния обычно представляют осколки микронной толщины и согласно анализу диссипации энергии, по-видимому, имеют состав, не отличающийся от матричной фазы. Дефекты могут быть удалены поредством отжита Ag2S или посредством закалки. Предполагается, что сами дефекты могут состоять из двухфазных областей, часть из которых должна быть обогащена Ga2S3, где стержне-подобные и пластино-подобные частицы второй фазы внедрены в матрипу. Количество и размер второй фазы затрудняет окончательный анализ состава.
    Notes: Summary Microscopic scattering centers in as-grown AgGaS2 were investigated by optical and scanning electron microscopy. The defects consisted of rectangular platelets lying in the (100) and (010) planes. Their longest dimension (up to 100 μm) was parallel to the [001]-direction. Their shorter dimension was parallel to the [100] and [010] directions, respectively. The scattering centers were usually fractions of a micrometer thick and did not appear to have a different composition than the matrix phase according to results by energy-dispersive analysis. The defects can be eliminated by annealing in Ag2S or quenching from elevated temperature, which suggests that the defects may themselves consist of a two-phase region, part of which should be Ga2S3-rich, where rodlike or platelike second-phase particles are embedded in the matrix. The quantity and the size of this second phase make a definitive compositional analysis difficult.
    Type of Medium: Electronic Resource
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