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    Wyświetlanie 1-3 z 3
    Tytuł:
    Magnetic Features at the Surfaces of Nanocrystalline Ribbons
    Autorzy:
    Miglierini, M.
    Šafářová, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534111.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Rt
    75.60.Ch
    75.70.-i
    71.55.Jv
    76.80.+y
    Opis:
    Magnetic behaviour of Nanoperm $Fe_{90}Zr_7B_3$ nanocrystalline alloy is studied by surface sensitive techniques comprising atomic force microscopy and magnetic force microscopy. Correlation of structural arrangement and magnetic order including the orientation of net magnetization is obtained by the help of the Mössbauer spectrometry. As-quenched amorphous alloys show no magnetic features. After annealing, maze magnetic domains have developed. Their shape is governed by surface crystallization. Position of net magnetization out of the ribbon plane by about 26° was determined by the Mössbauer spectrometry.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 840-842
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Hyperfine Fields of Nanoperm Alloys
    Autorzy:
    Miglierini, M.
    Kohout, J.
    Lančok, A.
    Šafářová, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1428957.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Tt
    75.75.-c
    76.80.+y
    76.60.-k
    68.37.Rt
    Opis:
    Magnetic hyperfine fields of $Fe_{90}Zr_7B_3$ Nanoperm nanocrystalline alloy are characterized by $\text{}^{57}Fe$ Mössbauer spectrometry and $P^{57}Fe$ NMR as well as by magnetic force microscopy. $\text{}^{57}Fe$ NMR enables to distinguish a broad signal of iron atoms located in a residual amorphous matrix from a narrow one which belongs to Fe in nanograins. The former coincides with the distribution of hyperfine fields obtained from $\text{}^{57}Fe$ Mössbauer spectroscopy. In addition, it is possible to make a distinction between NMR signals of the Fe nanograins located in magnetic domains from that of the nanograins positioned in domain walls. This is confirmed by magnetic force microscopy where appearance of maze-domains is observed.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1263-1265
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adenophora liliifolia: condition of its populations in Central Europe
    Autorzy:
    Prausova, R.
    Mareckova, L.
    Kapler, A.
    Majesky, L.
    Farkas, T.
    Indreica, A.
    Safarova, L.
    Kitner, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/19913.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    This study deals with populations of the European-South-Siberian geoelement Adenophora liliifolia (L.) A. DC. in the Czech Republic, Slovakia, Hungary, Romania, and Poland, where this species has its European periphery distribution. We studied the population size, genetic variability, site conditions, and vegetation units in which A. liliifolia grows. Recent and historical localities of A. liliifolia were ranked into six vegetation units of both forest and non-forest character. A phytosociological survey showed differences in the species composition among localities. Only a weak pattern of population structure was observed (only 22% of total genetic variation present at the interpopulation level, AMOVA analysis), with moderate values for gene diversity (Hj = 0.141) and polymorphism (P = 27.6%). Neighborjoining and Bayesian clusterings suggest a similar genetic background for most of the populations from Slovakia, the Czech Republic, and Poland, contrary to the populations from Hungary, Romania, as well as two populations from Central and South Slovakia. This might be explained by a relatively recent fragmentation of the A. liliifolia populations in Central Europe. Nevertheless, it seems that several populations in Romania, South Hungary, and Slovakia were isolated for a longer period of time and their genetic differentiation is more evident.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2016, 58, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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