INFRARED PROPERTIES OF SINGLE-CRYSTAL MGAL2O4, A SUBSTRATE FOR HIGH-TEMPERATURE SUPERCONDUCTING FILMS

被引：8
|
作者：
YANG, TR
HORNG, HE
YANG, HC
JANG, IJ
KANG, WN
YOM, SS
机构：
[1] NATL TAIWAN UNIV,DEPT PHYS,TAIPEI,TAIWAN
[2] KOREA ADV INST SCI & TECHNOL,SUPERCONDUCTOR LAB,SEOUL,SOUTH KOREA
来源：
PHYSICA C | 1994年 / 235卷
关键词：
D O I：
10.1016/0921-4534(94)91947-X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study and analyze the infrared properties of single crystal MgAl2O4, an important substrate for high-T-c superconducting films, from 10 to 300 cm(-1) and 4.2 to 350K. A number of infrared active modes between 20- 150 cm(-1) have been observed. Some of these modes such as 68, 72, 82, 103 cm(-1) are consist with the earlier reports by inelastic neutron scattering method and characterized as transverse acoustic phonon modes. Our measurements also shows extra modes such as 35, 44, 56, 75, 82 cm(-1). The spectra in the far-infrared region has about 60% transmission at 4.2K and opaque above 180cm(-1). The transparent properties of single crystal MgAl2O4 in fat infrared region in liquid helium temperature is especially good for HTSC thin films substrate.
引用
收藏
页码：1445 / 1446
页数：2
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