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中国物理学会期刊
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铁电钾钠铌酸锶钡薄膜电光性能的研究

物理学报, 2006, 55(9): 4928-4933.
DOI: 10.7498/aps.55.4928
CSTR: 32037.14.aps.55.4928

Electro-optic properties of potassium sodium strontium barium niobate ferroelectric thin films

Acta Phys. Sin., 2006, 55(9): 4928-4933.
DOI: 10.7498/aps.55.4928
CSTR: 32037.14.aps.55.4928
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  • 摘要

    采用溶胶-凝胶法在氧化镁单晶衬底上制备了符合化学计量比的完全填充型铁电钾钠铌酸锶钡(KNSBN)薄膜，通过X射线衍射，摇摆曲线，X射线Φ扫描，扫描电子显微镜等方法研究了薄膜的微结构，采用Adachi法研究了薄膜的电光特性. 实验发现，KNSBN薄膜在氧化镁(001)单晶衬底上沿c轴外延生长，K+，Na+的引入有效地提高了薄膜的横向电光系数r51. 成分为K0.2Na0.2Sr0.24Ba0.56Nb2O6, K0.2Na0.2Sr0.6Ba0.2Nb2O6, K0.2Na0.2Sr0.72Ba0.08Nb2O6的三种KNSBN薄膜的r51值分别为108.52pm/V, 119.98pm/V, 126.96pm/V，r51的数值随Sr2+含量增加而增大.

     

    Abstract

    Fully occupied ferroelectric ((KxNa1-x)0.4(SryBa1-y)0.8, 0.5051 of KNSBN films can be greatly improved by introducing alkali metal ions, the measured values of transverse electro-optic coefficient r51 of K0.2Na0.2Sr0.24Ba0.56Nb2O6, K0.2Na0.2Sr0.6Ba0.2Nb2O6, K0.2Na0.2Sr0.72Ba0.08Nb2O6 are 108.52pm/V, 119.98pm/V, and 126.96pm/V, respectively. An enhancement of r51 with Sr2+content in KNSBN films has been demonstrated.

     

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