The phases and magnetocaloric effect in the alloys (Gd1-xNdx)Co2 with x = 0,0.1,0.2,0.3,and 0.4 were investigated by X-ray diffraction analysis and magnetization measurement.The samples are single phase with a cubic MgCu2-type structure.The Tc decreases obviously with increasing Nd content from 404 K of the alloy with x = 0 to 272 K of the alloy with x = 0.4;for x = 0.3,the Tc is 296 K,which is near room temperature.In the samples (Gd1-xNdx)Co2 with x = 0.0,0.1,0.2,0.3,and 0.4,the maximum magnetic entropy change is 1.471,1.228,1.280,1.381 and 1.610 J.kg-1.K-1,respectively,in the applied field range of 0-2.0 T.The results of Arrott plots confirmed that the transition type were second order magnetic transition for x = 0,0.3,and 0.4.
参考文献
| [1] | Pecharsky VK;Gschneidner KA .Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from similar to 20 to similar to 290 K[J].Applied physics letters,1997(24):3299-3301. |
| [2] | Pecharsky VK;Gschneidner KA .Giant magnetocaloric effect in Gd-5(Si2Ge2)[J].Physical review letters,1997(23):4494-4497. |
| [3] | Pecharsky V K;Gschneidner K A J .Effect of alloying on the giant magnetoealoric effect of Gd5(Si2Ge2)[J].Journal of Magnetism and Magnetic Materials,1997,167:179. |
| [4] | Gu ZF;Zhou B;Li JQ;Ao WQ;Cheng G;Zhao HC .Magnetocaloric effect of GdCo2-xAlx compounds[J].Solid State Communications,2007(10):548-550. |
| [5] | Buschow K H J.Handbook of Magnetic Materials[M].Amsterdam:Elsevier Science,1999 |
| [6] | Zhou K W;Zhuang Y H;Li J Q;Deng J Q,Zhu Q M .Magnetocaloric effects in (Gd1-xTbx)Co2[J].Solid State Communications,2006,137:275. |
| [7] | Murata K.;Fujinaga Y.;Syono Y.;Goto T.;Fukamichi K. .MAGNETOELASTIC PROPERTIES OF LAVES PHASE COMPOUNDS (GD1-XYX)CO-2[J].Journal of Magnetism and Magnetic Materials,1995(2):833-834. |
| [8] | Liu X B;Altonnian Z .Magnetocaloric effect in (Er1-xGdx)Co2 pseudobinary compounds[J].Journal of Magnetism and Magnetic Materials,2005,292:83. |
| [9] | Wang DH.;Liu HD.;Tang SL.;Yang S.;Huang SL.;Du YW. .Magnetic properties and magnetocaloric effects in (GdxDy1-x)Co-2 compounds[J].Physics Letters, A,2002(3/4):247-252. |
| [10] | Hashimoto T;Numasawa T;Shino M;Okada T .Magnetic refrigeration in the temperature range from 10 K to room temperature:the ferromagnetic refrigerants[J].Cryogenics,1981,21:647. |
| [11] | Foldeaki M;Chahine R;Bose T K .Magnetic measurements:A powderful tool in magnetic refrigerator design[J].Journal of Applied Physics,1995,77:3528. |
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