The change of crystallite sizes and magnetocaloric effect in rapidly quenched dysprosiumстатья
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Дата последнего поиска статьи во внешних источниках: 29 декабря 2014 г.
Аннотация:Synthesis of nanocrystalline and microcrystalline dysprosium was carried out. Temperature and field dependences of magnetocaloric effect were performed by direct method in field up to 1.2 T and temperature range 80-190 K. It was found that the nanocrystalline state leads to a significant reduction of the magnetic phase transition temperatures and to a small increase of the maximum value of the magnetocaloric effect in dysprosium. It is associated with the large amount of interface atoms in nanocrystalline Dy ribbons with a lower number of the nearest-neighbor atoms, causing the magnetic phase transition temperature decrease.