通过示差扫描量热仪和振动样品磁强计对Ni_(43)Mn_(46-x)T_xSn_(11)(T=Fe,Co,Ni)铁磁形状记忆合金的相变、磁性以及磁熵变进行了研究.结果表明,由于价电子浓度的增加,Fe,Co,Ni替代Mn使马氏体转变温度大幅提高.Fe,Ni掺杂对马氏体居里温度(Tc_M)影响不大,Co则使T_c~M略有下降;奥氏体居里温度(T_c~A)对成分比较敏感,Fe,Ni的加入均使T_c~A略有提高,而Co则会大大提高T_c~A.由于马氏体相变伴随着磁化强度的突变,Ni_(43)Mn_(46-x)T_xSn_(11)合金在马氏体相变附近具有较大的低场磁熵变,对于Ni_(43)Mn_(41)Co_5Sn_(11)在室温1 T磁场下磁熵变达到了19 J·kg~(-1)·K~(-1).通过调节成分,磁熵变峰值温度可以在199和294 K之间调节,同时保持了较大低场磁熵变.
The phase transitions,magnetic properties,and magnetic entropy changes in Ni_(43)Mn_(46-x)T_xSn_(11)(T=Fe,Co,Ni)ferromagnetic shape memory alloys were studied by using differential scanning calorimeter and vibrating sample magnetometer.The martensitic transformation temperature increased rapidly with the substitution of Mn by Fe,Co,and Ni,which could be attributed to the increase of valence electron concentration.The Curie temperature of martensitie phase showed little dependence on the composition,while the curie temperature of austenitic phase(T_C~A)was sensitive to composition.Fe and Ni doping led a small increase of T_C~A,and the substitution of Mn by Co largely raised T_C~A.Large positive magnetic entropy changes were observed due to the large magnetization change around the martensitic transformation temperatures. Especially, in Ni_(43)Mn_(41) Co_5Sn_(11), the magnetic entropy change reached 19 J·kg~(-1)·K~(-1) in the field of 1 T at 294 K.By tuning the composition,the working temperature could be adjusted between 199 and 294 K with large magnetic entropy changes.
参考文献
| [1] | Bruck E .Developments in magnetocaloric refrigeration[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2005(23):R381-R391. |
| [2] | Pecharsky VK;Gschneidner KA .Giant magnetocaloric effect in Gd-5(Si2Ge2)[J].Physical review letters,1997(23):4494-4497. |
| [3] | 王志强,颜世宏,李宗安,于敦波,陈博雨,赵斌.以低纯度钆研究Gd5Si2Ge2的磁热效应及制备工艺[J].稀有金属,2007(02):183-186. |
| [4] | 张铁邦,陈云贵,付浩,滕保华,唐永柏,涂铭旌.低纯Gd制备Gd5Si2Ge2的结构与磁热性能[J].科学通报,2005(18):2043-2045. |
| [5] | Feng-xia Hu;Bao-gen Shen;Ji-rong Sun;Zhao-hua Cheng;Guang-hui Rao;Xi-xiang Zhang .Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe_(11.4)Si_(1.6)[J].Applied physics letters,2001(23):3675-3677. |
| [6] | 肖素芬,陈云贵,吴金平,杨涛,涂铭旌.La-Fe-M（M=Al, Si）化合物磁热性能研究进展[J].中国稀土学报,2003(06):621-625. |
| [7] | Tegus O;Brüek E;Buschow K H J;de Boer F R .Transitionmetal-based magnetic refrigerants for room-temperature applications[J].Nature(London),2002,415(6868):150. |
| [8] | Feng-xia Hu;Bao-gen Shen;Ji-rong Sun .Magnetic entropy change in Ni_(51.5)Mn_(22.7)Ga_(25.8) alloy[J].Applied physics letters,2000(23):3460-3462. |
| [9] | Krenke T;Duman E;Acet M;Wassermann EF;Moya X;Manosa L;Planes A .Inverse magnetocaloric effect in ferromagnetic Ni-Mn-Sn alloys[J].Nature materials,2005(6):450-454. |
| [10] | Z. D. Han;D. H. Wang;C. L. Zhang;S. L. Tang;B. X. Gu;Y. W. Du .Large magnetic entropy changes in the Ni_(45.4)Mn_(41.5)In_(13.1) ferromagnetic shape memory alloy[J].Applied physics letters,2006(18):182507-1-182507-3-0. |
| [11] | Han ZD;Wang DH;Zhang CL;Xuan HC;Gu BX;Du YW .Low-field inverse magnetocaloric effect in Ni50-xMn39+xSn11 Heusler alloys[J].Applied physics letters,2007(4):42507-1-42507-3-0. |
| [12] | Suton Y;Inlano Y;Koeda N;Omori T Kainuma R Ishida K Oikawa K .Magnetic and martonsitic transformations of NiMnX(x=In,Sn,Sb)ferromagnetic shape memory alloys[J].Applied Physics Letters,2004,85(19):4358. |
| [13] | S. Y. Yu;Z. H. Liu;G. D. Liu;J. L. Chen;Z. X. Cao;G. H. Wu;B. Zhang;X. X. Zhang .Large magnetoresistance in single-crystalline Ni_(50)Mn_(50-x)In_x alloys (x=14-16) upon martensitic transformation[J].Applied physics letters,2006(16):162503.1-162503.3. |
| [14] | Kainuma R;Imano Y;Ito W;Sutou Y;Morito H;Okamoto S;Kitakami O;Oikawa K;Fujita A;Kanomata T;Ishida K .Magnetic-field-induced shape recovery by reverse phase transformation.[J].Nature,2006(7079):957-960. |
| [15] | Krenke T;Acet M;Wassermann E F;Moya X Ma?osa L Planes A .Martemitic transitions and the nature of ferromagnetism in the austenitic and martensitic staates of Ni-Mn-Sn alloys[J].Physical Review B:Condensed Matter,2005,72(01):014412. |
| [16] | Manosa L;Moya X;Planes A;Gutfleisch O;Lyubina J;Barrio M;Tamarit JL;Aksoy S;Krenke T;Acet M .Effects of hydrostatic pressure on the magnetism and martensitic transition of Ni-Mn-In magnetic superelastic alloys[J].Applied physics letters,2008(1):12515-1-12515-3-0. |
| [17] | Han Zhida;Wang Dunhui;Zhang Chengliung;Xuan Haicheng Zhang Jianrong Gu Benxi Du Youwei .Effect of lattice contraction on martensitic transformation and magnetocaloric effect in Ge doped Ni-Mn-Sn alloys[J].Materials Science and Engineering B,2009,157(1-3):40. |
| [18] | S. Y. Yu;L. Ma;G. D. Liu;Z. H. Liu;J. L. Chen;Z. X. Cao;G. H. Wu;B. Zhang;X. X. Zhang .Magnetic field-induced martensitic transformation and large magnetoresistance in NiCoMnSb alloys[J].Applied physics letters,2007(24):242501-1-242501-3-0. |
| [19] | Krenke T;Acet M;Wassermann E F;Moya X Ma(n)osa L Planes A .Ferromagnetism in the austenitic and martemitic states of Ni-Mn-In alloys[J].Physical Review B:Condensed Matter,2005,72(17):014412. |
| [20] | Brown PJ;Gandy AP;Ishida K;Kainuma R;Kanomata T;Neumann KU;Oikawa K;Ouladdiaf B;Ziebeck KRA .The magnetic and structural properties of the magnetic shape memory compound Ni2Mn1.44Sn0.56[J].Journal of Physics. Condensed Matter,2006(7):2249-2259. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%