Phonon anomalies in the infrared conductivity of the RuSr2GdCu2O8 ferromagnetic superconductor

被引：2
|
作者：
Boris, AV
Bernhard, C
Kovaleva, NN
Mandal, P
Loidl, A
机构：
[1] Max Planck Inst FKF, D-70569 Stuttgart, Germany
[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
[3] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India
[4] Univ Augsburg, EKM, D-86135 Augsburg, Germany
来源：
PHYSICA B-CONDENSED MATTER | 2002年 / 312卷
关键词：
superconductivity; ferromagnetism; ruthenate-cuprate;
D O I：
10.1016/S0921-4526(01)01228-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have performed ellipsometric measurements of the infrared dielectric response of RuSr2GdCu2O8 polycrystalline ceramics. The transformation of the Cu-O bending phonon mode at 288 cm(-1) in the normal state to a broad absorption band at 308 cm(-1) in the superconducting state has been observed. This observation strikingly resembles the c-axis optical conductivity data reported for the YBa2Cu3O6.45 crystals. The anomalous softening of the Ru-related phonon mode at 190 cm(-1) has been observed on decreasing temperature below the magnetic T-M = 133 K transition temperature. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：797 / 799
页数：3
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