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Gd1-xVx系列合金的磁熱效應研究
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Study on Magnetocaloric Effects of Gd1-xVx Alloys
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    摘要:

    采用真空電弧熔煉方法制備Gd1-xVx (x=0.01,0.03,0.05,0.07,0.09)系列合金。研究發(fā)現(xiàn):Gd1-xVx合金完全保持了純Gd的六方型晶體結構,其在居里溫度附近的磁特性符合二級相變規(guī)律;合金居里溫度比純Gd低1~2 K,并且隨x的增加變化很小;在低磁場下Gd1-xVx合金具有較大的磁熵變、絕熱溫變以及較寬的ΔSM-T 曲線峰,并且所有樣品的相對制冷能力都明顯優(yōu)于純Gd。

    Abstract:

    The magnetic behavior of Gd1-xVx alloys (x=0.01, 0.03, 0.05, 0.07, 0.09) prepared by vacuum arc melting was analyzed. X-ray diffraction patterns show that all Gd1-xVx alloys retain crystal hexagonal structure of pure Gd. The ferromagnetic to paramagnetic phase transition of all alloys is the second order type. The Curie temperatures of these alloys are lower than that of Gd by 1~2 K and change a little with x increasing. It is noted that these alloys have large values of magnetic entropy change ΔSM, adiabatic temperatures change ΔTad and broader peak in the ΔSM-T plot in the low magnetic fields. All the alloys have remarkably better relative cooling power than pure Gd.

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馮 再,吳 衛(wèi),趙 輝,尹光福. Gd1-xVx系列合金的磁熱效應研究[J].稀有金屬材料與工程,2009,38(8):1378~1381.[Feng Zai, Wu Wei, Zhao Hui, Yin Guangfu. Study on Magnetocaloric Effects of Gd1-xVx Alloys[J]. Rare Metal Materials and Engineering,2009,38(8):1378~1381.]
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  • 收稿日期:2008-07-30
  • 最后修改日期:2008-10-25
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