Raman scattering and x-ray diffraction studies of polycrystalline CaCu3Ti4O12 under high-pressure -: art. no. 132103

被引：59
作者：
Valim, D
Souza, AG [1 ]
Freire, PTC
Fagan, SB
Ayala, AP
Mendes, J
Almeida, AFL
Fechine, PBA
Sombra, ASB
Olsen, J
Gerward, L
机构：
[1] Univ Fed Ceara, Dept Fis, Lab Espalhamento Raman, BR-60455900 Fortaleza, Ceara, Brazil
[2] Univ Fed Ceara, Lab telecomunicacoes & Ciencia & Engn Mat LOCEM, Lab Espalhamento Raman, BR-60455900 Fortaleza, Ceara, Brazil
[3] Univ Copenhagen, Niels Bohr Inst, Oersted Lab, DK-2100 Copenhagen, Denmark
[4] Tech Univ Denmark, Dept Phys, DK-2800 Kgs Lyngby, Denmark
来源：
PHYSICAL REVIEW B | 2004年 / 70卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.70.132103
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report Raman scattering and x-ray diffraction studies of polycrystalline CaCu3Ti4O12 (CCTO) under high pressures. The pressure dependence of several Raman modes was investigated. No anomalies have been observed on the phonon spectra thereby indicating that the T-h (Im (3) over bar) structure remains stable up to the maximum pressure (5.3 GPa) we reached in this experiment. The pressure coefficients for the observed Raman modes were determined. This set of parameters was used for evaluating the stress developed in CCTO thin films. The high-pressure x-ray studies were extended up to 46 GPa and the data confirmed that the T-h structure remains stable up to this pressure. The pressure-volume data are well described by the Birch's equation of state. The experimental value of the zero pressure bulk modulus is B-0=212+/-2 GPa. Gruneisen parameters of CCTO were also determined.
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页码：132103 / 1
页数：4
相关论文
共 22 条
[1]   Structural properties of CaCu3Ti4O12 obtained by mechanical alloying [J].
Almeida, AFL ;
de Oliveira, RS ;
Góes, JC ;
Sasaki, JM ;
Souza, AG ;
Mendes, J ;
Sombra, ASB .
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2002, 96 (03) :275-283
[2]   FINITE ELASTIC STRAIN OF CUBIC CRYSTALS [J].
BIRCH, F .
PHYSICAL REVIEW, 1947, 71 (11) :809-824
[3]   SYNTHESIS AND CHARACTERIZATION OF SERIES OF ISOTYPE PEROVSKITE TITANATES OF (CACU3) (MN4)O12 [J].
BOCHU, B ;
DESCHIZEAUX, MN ;
JOUBERT, JC ;
COLLOMB, A ;
CHENAVAS, J ;
MAREZIO, M .
JOURNAL OF SOLID STATE CHEMISTRY, 1979, 29 (02) :291-298
[4]   High temperature electrical properties of highly epitaxial CaCu3Ti4O12 thin films on (001) LaAlO3 [J].
Chen, L ;
Chen, CL ;
Lin, Y ;
Chen, YB ;
Chen, XH ;
Bontchev, RP ;
Park, CY ;
Jacobson, AJ .
APPLIED PHYSICS LETTERS, 2003, 82 (14) :2317-2319
[5]   Extrinsic models for the dielectric response of CaCu3Ti4O12 [J].
Cohen, MH ;
Neaton, JB ;
He, LX ;
Vanderbilt, D .
JOURNAL OF APPLIED PHYSICS, 2003, 94 (05) :3299-3306
[6]   Deposition and dielectric properties of CaCu3Ti4O12 thin films on Pt/Ti/SiO2/Si substrates using pulsed-laser deposition [J].
Fang, L ;
Shen, MR .
THIN SOLID FILMS, 2003, 440 (1-2) :60-65
[7]   Lattice dielectric response of CdCu3Ti4O12 and CaCu3Ti4O12 from first principles -: art. no. 012103 [J].
He, LX ;
Neaton, JB ;
Vanderbilt, D ;
Cohen, MH .
PHYSICAL REVIEW B, 2003, 67 (01) :121031-121034
[8]   First-principles study of the structure and lattice dielectric response of CaCu3Ti4O12 -: art. no. 214112 [J].
He, LX ;
Neaton, JB ;
Cohen, MH ;
Vanderbilt, D ;
Homes, CC .
PHYSICAL REVIEW B, 2002, 65 (21) :2141121-21411211
[9]   Optical response of high-dielectric-constant perovskite-related oxide [J].
Homes, CC ;
Vogt, T ;
Shapiro, SM ;
Wakimoto, S ;
Ramirez, AP .
SCIENCE, 2001, 293 (5530) :673-676
[10]   Polymeric citrate precursor route to the synthesis of the high dielectric constant oxide, CaCu3Ti4O12 [J].
Jha, P ;
Arora, P ;
Ganguli, AK .
MATERIALS LETTERS, 2003, 57 (16-17) :2443-2446
123