CHARACTERIZATION OF GDBA2CU3O7-DELTA THIN-FILMS BY RAMAN-SCATTERING

被引：0

作者：

HANGYO, M ^{[1
]}

NAKASHIMA, S ^{[1
]}

HASEGAWA, N ^{[1
]}

HAYASHI, S ^{[1
]}

WASA, K ^{[1
]}

机构：

[1] MATSUSHITA ELECT IND CO LTD,CENT RES LABS,MORIGUCHI,OSAKA 570,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 05期

关键词：

Fano effect; GdBa2Cu30; Oxygen content; Phonon; Raman spectra; Softening; Superconducting thin films;

D O I：

10.1143/JJAP.29.851

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Raman spectra of GdBa2Cu3O7-δ thin films (ortho-I, ortho-II and tetra) deposited on MgO substrates by rf magnetron sputtering were measured with an incident light beam whose direction was parallel or perpendicular to the c-axis. The oxygen content was estimated from the frequency of the Cu–O axial stretching mode for these films. The bending mode associated with oxygen at ∼320 cm-1 shows the Fano-type asymmetry for all three films indicating the strong electronphonon interaction in this system. This mode softens at around Tc with decreasing temperature for the ortho-I sample whereas it shifts upwards monotonically for the ortho-II and tetra samples. Comparison of this temperature dependence with that of YBa2Cu3O7-δ indicates that the softening of this mode is characteristic for the ortho-I phase. © 1990 The Japan Society of Applied Physics.

引用

页码：851 / 855

页数：5

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