在线阅读 --自然科学版 2020年4期《Si衬底上NiCo2O4薄膜的外延生长和电学性质》
Si衬底上NiCo2O4薄膜的外延生长和电学性质--[在线阅读]
甄聪棉1,2, 郭文哲1,2, 刘璐1,2, 田之雪1,2, 侯登录1,2
1. 河北师范大学 物理学院, 河北 石家庄 050024;
2. 河北省新型薄膜材料实验室, 河北 石家庄 050024
起止页码: 302--307页
DOI: 10.13763/j.cnki.jhebnu.nse.2020.04.004
摘要
改变沉积温度,在Si(100)衬底上制备了NiCo2O4外延薄膜,探究其结构和电学性质的变化.研究发现,衬底对薄膜有压应力作用,晶体结构产生压缩效果,使样品导电性增强;变程和近程跃迁在整个测试温区同时作用,低温以变程跃迁为主,高温以近程跃迁为主.

Epitaxial Growth and Electrical Properties of the NiCo2O4 Film on Si Substrate
ZHEN Congmian1,2, GUO Wenzhe1,2, LIU Lu1,2, TIAN Zhixue1,2, HOU Denglu1,2
1. College of Physics, Hebei Normal University, Hebei Shijiazhuang 050024, China;
2. Hebei Advanced Thin Film Laboratory, Hebei Shijiazhuang 050024, China
Abstract:
NiCo2O4 epitaxial thin films were prepared on Si(100) substrate by changing the growth temperature(tg).The changes of structure and electrical properties of the NiCo2O4 films were investigated.The substrate imposes compressive stress on the thin film,which makes the conductivity of the film enhance.It was found that the variable-range hopping(VRH) and nearest-neighbour hopping(NNH) mechanisms simultaneously are on action in the whole measurement temperature range.The VRH played an important role at low temperature,while the NNH dominated at celectrical transport high temperature.

收稿日期: 2019-12-29
基金项目: 国家自然科学基金(51971087);河北省自然科学基金(A2018205144);河北省高等学校自然科学重点项目(ZD2017041)

参考文献:
[1]BATTLE P D,CHEETHAM A K,GOODENOUGH J B.A Neutron Diffraction Study of the Ferromagnetic Spinel NiCo2O4[J].Mater Res Bull,1979,14(8):1013-1024.
[2]LENGLET M,GUILLAMET R,DURR J,et al.Electronic Structure of NiCo2O4 by XANES,EXAFS and 61Ni Mössbauer Studies[J].Solid State Commun,1990,74(10):1035-1039.doi:10.1016/0038-1098(90)90705-G
[3]GOU Y,LIANG X,CHEN B H,et al.Porous Ni-Co Bimetal Oxides Nanosheets and Catalytic Properties for CO Oxidation[J].J Alloy Compd,2013,574:181-187.doi:10.1016/j.jallcom.2013.04.053
[4]CUI B,LIN H,LI Y Z,et al.Photophysical and Photocatalytic Properties of Core-ring Structured NiCo2O4 Nanoplatelets[J].J Phys Chem C,2009,113(32):14083-14087.doi:10.1921/jp900028t
[5]TSAI S Y,FUNG K Z,WEI C N,et al.Thin Film Deposition of Semiconducting Ni-Co Oxide Spinel with Adequate Electrical and Optical Properties for Energy Application[J].J Elect Mater,2014,43(7):2584-2587.doi:10.1007/s11664-014-3144-z
[6]YUAN C.Template-engaged Synthesis of Uniform Mesoporous Hollow NiCo2O4 Sub-microspheres Towards High-performance Electrochemical Capacitors[J].RSC Advances,2013,3(40):18573.doi:10.1039/c3ra42828a
[7]WINDISCH C F,FERRIS K F,EXARHOS G J.Synthesis and Characterization of Transparent Conducting Oxide Cobalt-nickel Spinel Films[J].J Vac Sci Technol A,2001,19(4):1647-1651.doi:10.1116/1.1351799
[8]THARAYIL N J,SAGAR S,RAVEENDRAN R,et al.Dielectric Studies of Nanocrystalline Nickel-cobalt Oxide[J].Phys B,2007,399:1-8.doi:10.1016/j.physb.2007.03.037
[9]ZHANG K Q,ZHEN C M,WEI W G,et al.Insight into Metallic Behavior in Epitaxial Halfmetallic NiCo2O4 Films[J].RSC Adv,2017,7:36026-36033.doi:10.1039/c7ra03136j
[10]ZHEN C M,ZHANG X Z,WEI W G,et al.Nanostructural Origin of Semiconductivity and Large Magnetoresistance in Epitaxial NiCo2O4/Al2O3 Thin Films[J].J Phys D:Appl Phys,2018,51:145308-145316.doi:10.1088/1361-6463/aab2a3
[11]WU C F,GUO W Z,ZHEN C M,et al.Short-range Magnetic Ordering and Electrical Behavior in Epitaxial NiCo2O4 Thin Films[J].J Appl Phys,2019,126:043901-1-9.doi:10.1063/1.5100675
[12]KUECH T.Handbook of Crystal Growth:Thin Films and Epitaxy Volume Ⅲ A[M].2nd ed.Boston:North-Holland,2014.
[13]DILEEP K,LOUKYA B,SILWAL P,et al.Probing Optical Band Gaps at Nanoscale from Tetrahedral Cation Vacancy Defects and Variation of Cation Ordering in NiCo2O4 Epitaxial Thin Films[J].J Phys D:Appl Phys,2014,47:405001.doi:10.1088/0022-3727/47/40/405001
[14]GUO W Z,ZHEN C M,WU C F,et al.Influence of Growth Temperature on the Microstructure and Electrical Transport Properties of Epitaxial NiCo2O4 Thin Films[J].Ceram Int,2018,44:12539-12546.doi:10.1016/j.ceramint.2018.04.050
[15]MOTT N F.Electrons in Disordered Structures[J].Advan Phys,2001,50:865-945.doi:10.1080/00018730110102727
[16]MOTT N F,DAVIS E A.Electronic Process in Non-crystalline Materials[M].Oxford:Clarendon Press,1979.
[17]ROGINSKAYA Y E,MOROZOVA O V,LUBNIN E N,et al.Characterization of Bulk and Surface Composition of CoxNi1-xOy Mixed Oxides for Electrocatalysis[J].Langmuir,1997,13(17):4621-4627.doi:10.1021/la9609128
[18]NKENG P,POILLERAT G,KOENIG J F,et al.Characterization of Spinel-type Cobalt and Nickel Oxide Thin Films by X-ray Near Grazing Diffraction,Transmission and Reflectance Spectroscopies,and Cyclic Voltammetry[J].J Electrochem Soc,1995,142(6):1777-1783.doi:10.1149/1.2044193