Microwave absorption measurements in the complex perovskite Pb(Fe0.5Ta0.5)O3: Detection of short-range orderly regions

被引：5
|
作者：
Alvarez, G. [1 ]
Montiel, H. [2 ]
Castellanos, M. A. [3 ]
Heiras, J. [4 ]
Zamorano, R. [1 ]
机构：
[1] IPN, ESFM, Secc Estudios Posgrad & Invest, Mexico City 07738, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Dept Tecnociencias, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico
[3] Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico
[4] Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Ensenada 22860, Baja California, Mexico
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 130卷 / 1-2期
关键词：
Perovskite; Magnetoelectric; Electron paramagnetic resonance; Non-resonant microwave absorption; ELECTRON-PARAMAGNETIC-RESONANCE; POWER ABSORPTION; MAGNETIC-PROPERTIES; HEAT-CAPACITY; FERROELECTRICS; FIELD;
D O I：
10.1016/j.matchemphys.2011.07.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An electron paramagnetic resonance (EPR) study of the complex perovskite Pb(Fe0.5Ta0.5)O-3 (PFT) at X-band (8.8-9.8 GHz) is presented. The EPR spectra show a single broad line in the 300-480 K temperature range, attributable to Fe3+ (S=5/2) ions. The temperature dependence of the EPR parameters: the peak-to-peak linewidth (Delta H-pp), the resonance field (H-res) and the integrated intensity (I-EPR), suggests the existence of short-range magnetic correlations; which are associated with the presence of small orderly regions of iron ions in B-sites of the perovskites-type structure, and that they give origin to formation of iron clusters. Low-field microwave absorption (LFMA) is used to give further knowledge on this material; where this technique also gives evidence of these short-range orderly regions. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：587 / 590
页数：4
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