用对靶溅射技术在MgAl2O4 (100) (MAO) 和SrTiO3 (100) (STO)单晶基底上制备Pt薄膜.基底温度为700℃时,Pt薄膜外延生长为(200)取向,Pt/STO 薄膜的电阻率很低,而Pt/MAO 薄膜表现出高电阻特征.此外,Pt (50nm)/La0.67Ca0.33MnO3 (50nm)/STO的制备和研究表明,在包括庞磁电阻材料的器件设计中,Pt是一种较好的电极材料.
Thin platinum (Pt) films were prepared on single-crystal substrates MgAl2O4 (100) (MAO) and SrTiO3 (100) (STO) by a facing-target sputtering technique. The films prepared at higher substrate temperature (Ts= 700℃) were grown epitaxially with (200) orientation on SrTiO3 (100) and MgAl2O4 (100). Different from the lower resistivity of Pt/STO film, Pt/MAO film shows a very higher resistivity and the temperature dependence of the resistance exhibits insulator behavior because of the pinhole formation. We also grew epitaxial Pt (50 nm)/La0.67Ca0.33MnO3 (50nm)/STO structure, indicating that Pt is a good electrode for devices involving colossal magnetoresistance materials.
参考文献
[1] | Cillessen J F M;Wolf R M;De Leeuw D M .Pulsed Laser Deposition of Heteroepitaxial Thin Pt Films on MgO(100)[J].Thin Solid Films,1993,226:53. |
[2] | Cui G;Van Buskirk P C;Zhang J;Beetz Jr C P,Steinbeck J,Wang Z L,Bentley J [J] .[J].Materials Research Society Symposium Proceedings,1993,310:345. |
[3] | Narajan J;Tiwari K;Jagannaadham K;Holland O W .Formation of Epitaxial and Textured Platinum Films on Ceramics-(100) MgO Single Crystals by Pulsed Laser Deposition[J].Applied Physics Letters,1994,64:2093. |
[4] | Mcnityre P C;Maggiore C J;Nastasli M .Orientation Selection in Thin Platinum Films on(001) MgO[J].Journal of Applied Physics,1995,77:6201. |
[5] | Harp G R;Parkin S S P .Epitaxial Growth of Metals by Sputter Deposition[J].Thin Solid Films,1996,288:315. |
[6] | Zeng X T;Wong H K .Epitaxial growth of single crystal (La,Ca)MnO3 thin films[J].Applied Physics Letters,1995,66:3371. |
[7] | Zhao K.;Zhou LZ.;Leung CH.;Yeung CF.;Fung CK.;Wong HK. .Epitaxial growth of oxide films (La-Ca-Mn-0 and Y-Ba-Cu-O) by the facing-target sputtering technique[J].Journal of Crystal Growth,2002(Pt.1):608-611. |
[8] | Zhao K;Wong H K .Epitaxial Growth of Platinum Thin Films on Various Substrates by Facing-target Sputtering Technique[J].Journal of Crystal Growth,2003,256:283. |
[9] | Fischer G;Hoffmann H;Vancea J .Mean Free Path and Density of Conductance Electrons in Platinum Determined by the Size Effect in Extremely Thin Films[J].Physical Review B,1980,22:6065. |
[10] | Takai K;Sato M .Epitaxial Growth of Platinum Thin Films on(100) MgO by Pulsed Laser Deposition[J].Superconductor Science and Technology,1999,12:486. |
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