Research Advance on Magnetocaloric Effect of La-Fe-M(Al, Si) Compounds
来源期刊：JOURNAL OF RARE EARTHS2004年第2期
论文作者：吴金平 涂铭旌 郝春 肖素芬 陈云贵
Key words：metal materials; magnetic refrigerating material; magnetocaloric effect; isothermal magnetic entropy change; adiabatic temperature change; La-Fe-M(M=Al,Si); rare earths;
Abstract: Recent research progress on magnetocaloric effect of La-Fe-M(M=Al,Si)compounds was presented.La-Fe-M(M=Al,Si)compounds of high Fe content are excellent soft magnetic materials with NaZn13 structure.The Curie temperature of the compounds can be increased by substituting small amount of Co for Si,Al.The La(Fe1-yCoy)xSi13-x compounds with an appropriate ratio of Co and Si can produce giant magnetocaloric effect comparable to that for Gd5Si2Ge2 at room temperature.The La(FexSi1-x)13 doped with H can also produce giant magnetocaloric effect at room temperature,which is much greater than that for Gd.For La(FexSi1-x)13 compounds with low Si or high Si contents.The nature of phase transition near Curie temperature induced by temperature and magnetic field was described in detail.
吴金平1，涂铭旌1，郝春1，肖素芬1，陈云贵1
(1.School of Materials Science and Engineering,Sichuan University,Chengdu 610065,China)
Abstract:Recent research progress on magnetocaloric effect of La-Fe-M(M=Al,Si)compounds was presented.La-Fe-M(M=Al,Si)compounds of high Fe content are excellent soft magnetic materials with NaZn13 structure.The Curie temperature of the compounds can be increased by substituting small amount of Co for Si,Al.The La(Fe1-yCoy)xSi13-x compounds with an appropriate ratio of Co and Si can produce giant magnetocaloric effect comparable to that for Gd5Si2Ge2 at room temperature.The La(FexSi1-x)13 doped with H can also produce giant magnetocaloric effect at room temperature,which is much greater than that for Gd.For La(FexSi1-x)13 compounds with low Si or high Si contents.The nature of phase transition near Curie temperature induced by temperature and magnetic field was described in detail.
Key words:metal materials; magnetic refrigerating material; magnetocaloric effect; isothermal magnetic entropy change; adiabatic temperature change; La-Fe-M(M=Al,Si); rare earths;
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