研究了1:1型MnP基系列合金MnP_(1-x)M_x(M=Si,Sb,Ge,Zn,Sn)(x=0,0.1)的结构及其磁热效应.室温X射线衍射表明该系列合金的主相结构均为正交MnP结构,空间群为Pnma.在用Ce,Sb,Zn,Sn作为替代元素的合金中存在少量第二相Mn_(5.64) P_3.磁性测量表明该系列合金MnP_(1-x)M_x(M=Si,Sb,Ge,Zn,Sn)(x=0,0.1)的存在由铁磁-顺磁的二级相变.其居里温度T_c分别为286,295,291,295,295 K.通过磁化曲线计算了MnP_(1-x)M_x(M=Si,Sb,Ge,Zn,Sn)(x=0,0.1)合金的最大等温磁熵变-△S_m,均在0.7-1.3 J·kg~(-1)·K~(-1)之间.
The crystal structure and magnetocaloric effect of MnP based 1:1 type MnP_(1-x)M_x(M=Si,Sb,Ge,Zn,Sn)(x=0,0.1)alloys was studied.X-ray diffraction showed that the crystal structure was orthorhombic MnP-type structure(pnma).There was mirror amound of secondary phase Mn_(5.64)P_3 when substituted by Ge,Sb,Co,Zn,Sn.Magnetic measurements showed that ferromagnetic-paramagnetic second ordertransition happened in MnP_(1-x)M_x(M=Si,Sb,Ge,Zn,Sn)(x=0,0.1)alloys.The Curie temperature of MnP_(1-x)M_x(x=0,0.1)was 286,295,294,295,295 K for Si,Sb,Ge,Zn,Sn,respectively.Magnetic entropy change-△S_m of MnP_(1-x)M_x(M=Si,Sb,Ge,Zn,Sn)(x=0,0.1)alloys was cMculated by magnetization curves,which ranged from 0.7 to 1.3J·Kg_(-1).K_(-1).
参考文献
| [1] | 陈鹏,王敦辉,都有为.磁制冷工质材料的研究进展[J].物理学进展,1999(04):371-385. |
| [2] | H. Wada;Y. Tanabe .Giant magnetocaloric effect of MnAs_(1-x)Sb_(x)[J].Applied physics letters,2001(20):3302-3304. |
| [3] | Hirofumi Wada;Kentaro Taniguchi;Yuji Tanabe .Extremely Large Magnetic Entropy Change of MnAs_(1-x)Sb_x near Room Temperature[J].Materials transactions,2002(1):73-77. |
| [4] | Wada H.;Morikawa T.;Taniguchi K.;Shibata T.;Yamada Y.;Akishige Y. .Giant magnetocaloric effect of MnAs1-xSbx in the vicinity of first-order magnetic transition[J].Physica, B. Condensed Matter,2003(1/2):114-116. |
| [5] | Sergio Gama;Adelino A. Coelho;Ariana de Campos;A. Magnus G. Carvalho;Flavio C. G. Gandra;Pedro J. von Ranke;Nilson A. de Oliveira .Pressure-Induced Colossal Magnetocaloric Effect in MnAs[J].Physical review letters,2004(23):237202.1-237202.4. |
| [6] | ARIANA DE CAMPOS;DANIEL L ROCCO;ALEXANDRE MAGNUS G.CARVALHO .Ambient pressure colossal magnetocaloric effect tuned by composition in Mn_(1-x)Fe_xAs[J].Nature materials,2006(10):802-804. |
| [7] | Daniel L. Rocco;Ariana de Campos;Alexandre Magnus G. Carvalho;Luana Caron;A. A. Coelho;S. Gama;Flavio C. G. Gandra;Adenilson O. dos Santos;Lisandro P. Cardoso;Pedro J. von Ranke;Nilson A. de Oliveira .Ambient pressure colossal magnetocaloric effect in Mn_(1-x)Cu_(x)As compounds[J].Applied physics letters,2007(24):242507-1-242507-3-0. |
| [8] | Sun NK;Cui WB;Li D;Geng DY;Yang F;Zhang ZD .Giant room-temperature magnetocaloric effect in Mn1-xCrxAs[J].Applied physics letters,2008(7):72504-1-72504-3-0. |
| [9] | M. Balli;D. Fruchart;D. Gignoux;C. Dupuis;A. Kedous-Lebouc;R. Zach .Giant magnetocaloric effect in Mn_(1-x)(Ti_(0.5)V_(0.5))_(x)As: Experiments and calculations[J].Journal of Applied Physics,2008(10):103908-1-103908-3-0. |
| [10] | Cui W B;Liu W;Liu X H;Guo S Han Z Zhan X G Zhang Z D .Beneficial effect of minor Al substitution on the magnetocaloric effect of Mn_(1-x)Al_xAs[J].Materials Letters,2009,63:595. |
| [11] | Cui W B;Liu W;Liu X H;Guo S Han Z Zhan X G Zhang Z D .Magnetocaloric effects and reduced thermal hysteresis in Sidoped MnAs compounds[J].Journal of Alloys and Compounds,2009,479(1-2):189. |
| [12] | Reis MS;Rubinger RM;Sobolev NA;Valente MA;Yamada K;Sato K;Todate Y;Bouravleuv A;von Ranke PJ;Gama S .Influence of the strong magnetocrystalline anisotropy on the magnetocaloric properties of MnP single crystal[J].Physical review, B. Condensed matter and materials physics,2008(10):104439-1-104439-8-0. |
| [13] | R. A. Booth;S. A. Majetich .Crystallographic orientation and the magnetocaloric effect in MnP[J].Journal of Applied Physics,2009(7):07A926-1-07A926-3-0. |
| [14] | Brück E;Tegus O;Cam Thanh D T;Nguyen T Trung Buschow K H J .A review on Mn based materials for magnetic refrigeration:Structure and properties[J].International Journal of Refrigeration,2008,31:763. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%