西南科技大学学报
西南科技大學學報
서남과기대학학보
JOURNAL OF SOUTHWEST CHINA INSTITUTE OF TECHNOLOGY
2012年
3期
27-31
,共5页
陈丽英%陈士娟%王瑜英%王雪敏%曹林洪%吴卫东
陳麗英%陳士娟%王瑜英%王雪敏%曹林洪%吳衛東
진려영%진사연%왕유영%왕설민%조림홍%오위동
FePt：MgO薄膜%脉冲激光沉积%薄膜结构%表面等离激元共振吸收
FePt：MgO薄膜%脈遲激光沉積%薄膜結構%錶麵等離激元共振吸收
FePt：MgO박막%맥충격광침적%박막결구%표면등리격원공진흡수
FePt:MgO films%PLD%Film structure%UV-visible absorption spectra%Plasmon resonance absorption
采用脉冲激光沉积法（PLD）制备了FePt：MgO多层复合薄膜。采用高分辨透射电子显微镜（HRTEM）分析了薄膜的结构;采用紫外可见分光光度计分析了薄膜的线性光学性能。HRTEM分析表明基质MgO在单晶MgO衬底上同质外延生长,而FePt纳米颗粒周期性均匀地自组织嵌埋在MgO基质中。HRTEM的快速傅里叶变换（FFT）图表明,FePt纳米颗粒为富Pt的面心立方（FCC）结构的FePt3,其晶格常数αFePt3=3.90 。（1。=0.1 nm）。MgO基质与FePt纳米颗粒的界面分析表明,它们的界面处几乎不存在非晶层,只在FePt纳米颗粒与MgO基质的晶界线附近有少量的刃型位错。薄膜的紫外可见吸收谱结果表明,低脉冲数样品具有远紫外增透作用,高脉冲数样品存在3个表面等离子激元共振吸收峰,随FePt沉积脉冲数增加,吸收峰位置均发生红移,峰强逐渐减弱,峰强比规律变化。
採用脈遲激光沉積法（PLD）製備瞭FePt：MgO多層複閤薄膜。採用高分辨透射電子顯微鏡（HRTEM）分析瞭薄膜的結構;採用紫外可見分光光度計分析瞭薄膜的線性光學性能。HRTEM分析錶明基質MgO在單晶MgO襯底上同質外延生長,而FePt納米顆粒週期性均勻地自組織嵌埋在MgO基質中。HRTEM的快速傅裏葉變換（FFT）圖錶明,FePt納米顆粒為富Pt的麵心立方（FCC）結構的FePt3,其晶格常數αFePt3=3.90 。（1。=0.1 nm）。MgO基質與FePt納米顆粒的界麵分析錶明,它們的界麵處幾乎不存在非晶層,隻在FePt納米顆粒與MgO基質的晶界線附近有少量的刃型位錯。薄膜的紫外可見吸收譜結果錶明,低脈遲數樣品具有遠紫外增透作用,高脈遲數樣品存在3箇錶麵等離子激元共振吸收峰,隨FePt沉積脈遲數增加,吸收峰位置均髮生紅移,峰彊逐漸減弱,峰彊比規律變化。
채용맥충격광침적법（PLD）제비료FePt：MgO다층복합박막。채용고분변투사전자현미경（HRTEM）분석료박막적결구;채용자외가견분광광도계분석료박막적선성광학성능。HRTEM분석표명기질MgO재단정MgO츤저상동질외연생장,이FePt납미과립주기성균균지자조직감매재MgO기질중。HRTEM적쾌속부리협변환（FFT）도표명,FePt납미과립위부Pt적면심립방（FCC）결구적FePt3,기정격상수αFePt3=3.90 。（1。=0.1 nm）。MgO기질여FePt납미과립적계면분석표명,타문적계면처궤호불존재비정층,지재FePt납미과립여MgO기질적정계선부근유소량적인형위착。박막적자외가견흡수보결과표명,저맥충수양품구유원자외증투작용,고맥충수양품존재3개표면등리자격원공진흡수봉,수FePt침적맥충수증가,흡수봉위치균발생홍이,봉강축점감약,봉강비규률변화。
FePt:MgO multilayer thin films were successfully fabricated by pulsed laser deposition(PLD) technique.The structure of the films was characterized by high-resolution electron microscopy(HRTEM).The linear optical properties of the films were analyzed by UV-Vis absorption spectra.HRTEM results suggest that MgO matrix was homo-epitaxially grown on the single crystal MgO substrate surface,and FePt nanoparticles were self-organized embedded in the MgO matrix uniformly and periodically.The Fast Fourier Transform(FFT) analysis of HRTEM images of FePt nanoparticles shows that the FePt nanoparties are FePt3 face-centered cubic(FCC) structure with Pt-rich,and the lattice parameters are =3.90 .(1.=0.1 nm).The interface analysis between the MgO matrix and FePt nanoparticles shows that there are almost no amorphous layers at the interface,and a small account of edge dislocations were observed near the grain boundary of FePt nanoparticles and MgO matrix.According to UV-visible absorption spectra,negative absorption on far ultraviolet was observed for the sample with low pulse number of the films.Three surface plasma resonance absorption peaks were observed at the films samples with high pulse numbers.With increasing of the deposition pulse numbers of FePt,the absorption peaks are red-shifted,the intensities of the absorption peaks are getting weakened,and the ratio of the peak intensities changes gradually.
