Archiwa tagu: gadolin

Magically magnetic gadolinium : Nature Chemistry : Nature Publishing Group

Gadolin to jeden z najważniejszych materiałów używanych przez nas przy próbach skonstruowania efektywnego magnetokalorycznego urządzenia chłodzącego. Warto zapoznać się z podstawowymi faktami na jego temat.

Nazwa pierwiastka (gadolin) pochodzi z hebrajskiego ‚gadol’ — wielki (i jej zapis w hebrajskim).

Both gadolinium and some of its alloys or salts play a prominent role in magnetic cooling. In this refrigeration process, a magnetic substance becomes hotter when placed under certain external magnetic field, owing to the orientation of its magnetic dipoles. Inversely when the field is removed, and the substance thermally isolated, it cools down. By varying the magnetic field, and the sample’s insulation, one shuffles entropy between the material’s electronic spin system and other degrees of freedom.

Źródło: Magically magnetic gadolinium : Nature Chemistry : Nature Publishing Group

  • [DOI] P. Pyykkö, „Magically magnetic gadolinium,” Nature chemistry, vol. 7, iss. 8, p. 680–680, 2015.
    [Bibtex]
    @Article{pyykko_magically_2015,
    Title = {Magically magnetic gadolinium},
    Author = {Pyykkö, Pekka},
    Journal = {Nature Chemistry},
    Year = {2015},
    Month = aug,
    Number = {8},
    Pages = {680--680},
    Volume = {7},
    Abstract = {Pekka Pyykkö discusses the history and characteristics of gadolinium.},
    Copyright = {© 2015 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.},
    Doi = {10.1038/nchem.2287},
    ISSN = {1755-4330},
    Language = {en},
    Url = {http://www.nature.com/nchem/journal/v7/n8/full/nchem.2287.html},
    Urldate = {2015-07-26}
    }