For BaTiO_3 film materials,the result indicates that thermal diffusivity shows clear size effect when film thickness is micrometer size.The experiment result can be analys...

• 结果表明当薄膜材料的厚度减少到微米级时,热扩散率表现出对厚度尺寸效应的依赖性,此时需用微观热量输运理论进行分析。