摘要
利用集成有金属薄膜电极的金刚石对顶砧,对微米氧化锌样品进行了原位高压电导率测量.结果表明,在9.19GPa时样品电导率达到最小值,在9.19—11.22GPa时样品电导率急剧增大,说明此时样品从纤锌矿结构向岩盐矿结构转变直至完全相变,11.22GPa为相变点.通过测量不同条件下高温退火处理的样品电导率,明显看到氧空位对电导率的影响.
Using the diamond anvil cell（DAC）method and the technology of sputtered film,photoetch and chemical etching, the conductivity of micron dimension ZnO were measured successfully under high pressure with molybdenum electrodes on DAC. The samples conductivity was minimal at 9. 19 GPa pressure,which showed the beginning of structural phase transition from wurtzite to rocksalt. Contining compression as far as 11. 22 GPa,the conductivity increased rapidly and then slowly,which indicated the phase transformation pressure spot was 11. 22 GPa and the whole example was of rocksalt structure. In addition,it was found that the oxygen holes caused conductivity change by experimentally comparing the samples annealed at 500 ℃ in air,in argon and unannealed respectively.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第6期4235-4239,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10874053
50532020
50802033)
国家重点基础研究发展计划(批准号:2005CB724404)
教育部创新团队发展计划(批准号:IRT0625)资助的课题~~
关键词
高压
微米氧化锌
电导率
金刚石对顶砧
high pressure
micron dimension ZnO
conductivity
diamond anvil cell
