%0 Journal Article
%T The magnetocaloric effect of the Gd-based amorphous composite with Gd nanocrystals<br>Gd基非晶与Gd纳米晶复合结构的磁制冷效应
%A Wang Yong-Tian
%A Liu Zong-De
%A Yi Jun
%A Xue Zhi-Yong
%A <br>王永田
%A 刘宗德
%A 易军
%A 薛志勇
%J 物理学报
%D 2012
%I 
%X The Gd-based amorphous/nanocrystal composite is prepared by controlling the cooling rate and the element ratio.The X-ray diffraction,differential scanning calorimeter and atomic force microscope/magnetic force microscope are used to confirm the composite microstructures from different perspectives.The magnetic test shows the great enhancement of magnetocaloric effect in the metallic glassy composite.The large magnetic refrigerant capacity（RC） up to 103 J·kg-1 is more than double the RC values of the Gd-based bulk metallic glass and pure Gd.The full width at half maximum of the magnetic entropy change（ΔSm） peak almost spreads over the whole low-temperature range,which is five times wider than that of the pure Gd.The maximumΔSm approaches a nearly constant value in a wide temperature span（over 80 K）.The super paramagnetic nanoclusters of the composite increase the magnetic refrigerant capacity greatly.In combination with the low magnetic hysteresis and large resistance,the metallic glass composite may be a potential candidate for the ideal Ericsson-cycle magnetic refrigeration.
%K amorphous
%K magnetiocaloric effect
%K nanocrystals<br>非晶
%K 磁制冷效应
%K 纳米晶
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=9B2BCA8CA9CB30DF49D111678A683019&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=94C357A881DFC066&sid=CC3DA2E151A14D23&eid=CC3DA2E151A14D23&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=25