Combinatorial fabrication and cathodoluminescence properties of composition spread MHfO3:Tm3+(M = Ca, Sr and Ba) films

N Arai, T.W Kim, H Kubota, Y Matsumoto, H Koinuma

doi:10.1016/s0169-4332(02)00349-5

Combinatorial fabrication and cathodoluminescence properties of composition spread MHfO3:Tm3+(M = Ca, Sr and Ba) films

DOI Web Site Web Site 被引用文献8件

書誌事項

公開日: 2002-09

権利情報

https://www.elsevier.com/tdm/userlicense/1.0/

DOI

10.1016/s0169-4332(02)00349-5

公開者: Elsevier BV

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説明

Abstract A series of MHfO 3 :Tm 3+ (M=Ca, Sr and Ba) films were fabricated on SrTiO 3 (0 0 1) substrate by using combinatorial pulsed laser deposition (PLD) technique. Their crystal structures and luminescence properties were characterized by the concurrent X-ray diffraction (CXRD) and by the cathodoluminescence (CL) using 5 kV electron beam, respectively. By monitoring the reflection high energy electron diffraction (RHEED) intensity oscillation, the growth of MHfO 3 :Tm 3+ films were optimized to proceed in a epitaxial layer-by-layer fashion. Different from bulk powders, which had the highest CL intensity in SrHfO 3 :Tm 3+ , the composition spread film of Sr 1− x Ca x HfO 3 :Tm 3+ ( x =0–1) exhibited the highest CL intensity at x =0.7 rather than SrHfO 3 :Tm 3+ ( x =0). This anomalous behavior in the films is discussed in view of the stress effect from the substrate.