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

页码：587 / 590

页数：4

共 27 条

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