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- W3140851004 abstract "利用机械合金化（MA）结合放电等离子烧结（SPS）技术,成功制备了Mn1.2Fe0.8P0.74Ge0.26-xSex（x=0,0.005,0.01,0.015,0.02,0.03）化合物,并采用XRD,DSC,振动样品磁强计（VSM）和磁热效应直接测量仪等手段对其晶体结构、相变过程以及磁热性能进行了研究.结果表明：该系化合物均具有六方Fe2P结构.随着Se含量的增加,晶格常数a和c都发生了明显的变化,c/a先减小,然后保持不变,最后又增大;且c/a的值与化合物的Curie温度Tc成一定对应关系,c/a减小会升高Tc,反之则降低Tc.外加磁场和温度的变化都能引起化合物产生一级磁热相变,即顺磁相（PM）→铁磁相（FM）.少量Se对Ge的置换（x≤0.015）能够提高材料的磁热性能,使该系化合物的Tc升高,转变温区△Tcoex变窄,绝热温变△Tad增大;而热滞△Thys和熵变△SDSC基本不变.当x=0.01时,化合物的磁热性能最好,与x=0化合物相比,Tc升高了5.6 K,？Tcoex降低了10.6%,△Tad增加了10%,当Se含量继续增加时,化合物的磁热性能有所下降." @default.
- W3140851004 created "2021-04-13" @default.
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- W3140851004 date "2014-01-01" @default.
- W3140851004 modified "2023-10-17" @default.
- W3140851004 title "Mn1.2Fe0.8P0.74Ge0.26-xSex化合物磁热性能研究" @default.
- W3140851004 hasPublicationYear "2014" @default.
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