系统地研究了新型稀土-半导体-磁性金属所组成的RSn3-xCox(R=Nd,Sm; x=0～0.3)系列的制备、晶体结构以及磁性.研究表明:RSn3-xCox具有AuCu3型立方结构,空间群Pm3m,稀土原子占据la晶位,Sn占据3c晶位,Co部分替代Sn占据3c晶位.点阵常数与晶胞体积常数随Co掺杂量的增加而减小.其磁性变化与Co含量密切相关,随着Co含量的增加,稀土半导体化合物中产生铁磁性相,在Sm-Sn-Co体系中SmSn2.8 Co0.2呈现混合磁性、SmSn2.7Co0.3呈现铁磁性,这有别于纯RSn3系列的磁性(低温反铁磁型和室温的顺磁性),为这类稀土半导体化合物作为新型磁电子材料的潜在应用提供了可能性.
参考文献
| [1] | Cheng Gong,Yang Qinglin,Ji Tianhao .Diluted magnetic semiconductor nanocrystals[J].Chem Bull,2006,69(1):W079 程功,杨青林,嵇天浩.稀释磁性半导体在纳米材料领域的研究进展[J].化学通报,2006,69(1):W079,2006. |
| [2] | 程功,杨青林,嵇天浩.稀释磁性半导体在纳米材料领域的研究进展[J].化学通报（印刷版）,2006(08):639-640. |
| [3] | Shen Tingting.Spin polarization transport of Zn1-x CoxO concentrated magnetic semiconductor films[D].Jinan:Shandong University,2013 ,2013. |
| [4] | 沈婷婷.Zn1-xCoxO弄磁半导体的自旋极化运输研究[D].济南:山东大学,2013,2013. |
| [5] | Grunberg P,Schreiber R,Pang Y,et al .Layered magnetic structures:Evidence for antiferromagnetic coupling of Fe layers across Cr interlayers[J].Phys Rev Lett,1986,57(19):2442,1986. |
| [6] | Schmidt G .Concepts for spin injection into semiconductors[J].J Phys D Appl Phys:Rev,2005,38:R107,2005. |
| [7] | Moodera J S,Kinder L R,Wong T M,et al .Large magnetoresistance at RT in ferromagnetic thin film tunnel junctions[J].Phys Rev Lett:Meservey R,1995,74(16):3273,1995. |
| [8] | Von Molnar S,Methfessel S .Giant negative magnetoresistance in ferromagnetic Eu1-xGdx Se[J].J Appl Phys,1967,38(13):959,1967. |
| [9] | Matthias B T,Bozorth R M,Van Vleck J H .Ferromagnetic interaction in EuO[J].Phys Rev Lett,1961,7(5):160,1961. |
| [10] | Dietl T,Andrearczyk T,Lipinska A,et al .Origin of ferromagnetism in Zn1t-x CoxO from magnetization and spin-dependent magnetoresistance measurements[J].Phys Rev B,2007,76(15):155312,2007. |
| [11] | Chen G,Zeng F,Pan F .Enhanced spin injection and voltage bias in (Zn,Co)/O/MgO/(Zn,Co) O magnetic tunnel junctions[J].Appl Phys Lett,2009,95(23):232508,2009. |
| [12] | Dietl T,Ohno H,Matsukura F,et al.Zener model description of ferromagnetism in zinc-blende magnetic semiconductorsiJ】.Science,2000,287(5455):1019,2000. |
| [13] | Dietl T,Moss T S,Mahajan S.Diluted magnetic semiconductors[M].North Holland:Handbook of Semiconductors,1994,1994. |
| [14] | 颜世申,梅良模,陈延学,刘国磊,宋红强,张云鹏,田玉峰,乔瑞敏.浓磁半导体材料的制备、磁性和自旋极化的输运[J].山东大学学报：理学版,2011(10):81-85. |
| [15] | 颜世申,梅良模,陈延学,刘国磊,宋红强,张云鹏,田玉峰,乔瑞敏.浓磁半导体材料的制备、磁性和自旋极化的输运[J].山东大学学报：理学版,2011(10):81-85. |
| [16] | Yamaoka H,Jarrige P T I,Tsujii K S N,et al .High-resolution photoelectron spectroscopy study of kondo metals:SmSn3 and SmSn0.9La0.1Sn3[J].Phys Rev B,2012,85(11):115120,2012. |
| [17] | Tsuchida T,Wallace W E .Magnetic characteristics of lanthanide elements combined with tin,lead,and indium[J].J Chem Phys,1965,43(11):3811,1965. |
| [18] | Lethuillier P,Pierre J,et al .Crystal fields and magnetic properties of NdSn3,NdPb3 and NdIn3[J].J Phys France,1975,36(4):329,1975. |
| [19] | Kletowski Z .Anomalous thermoelectric power behaviour in PrSn3 and NdSn3[J].Solid State Commun,2006,137(11):634,2006. |
| [20] | Kletowski Z,Staliski,Bazan C .High field magnetoresistance in antiferromagnetic monocrys-talline PrSn3 and NdSn3[J].J Phys Colloques,1979,40:145,1979. |
| [21] | Benaichouba B,Bussiere P,Friedt J M,et al .Comparative study of SnSbO and SnSbFeO mixed oxide catalysts in propylene mild oxidation[J].Appl Catal,1983,8(2):237,1983. |
| [22] | Ito T U,Higemoto W,Ninomiya K,et al .Absence of pure quadrupole ordering in SmSn3:Dipole-dipole and quadrupole-quadrupole interactions in Sm-based compounds[J].Phys RevB,2011,84(6):064411,2011. |
| [23] | Bozorth R M.Ferromagnetism[M].New York:D Van Nostrand Co Inc,1951,1951. |
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