TY - JOUR
T1 - Microwave absorption measurements in the complex perovskite Pb(Fe 0.5Ta0.5)O3
T2 - Detection of short-range orderly regions
AU - Alvarez, G.
AU - Montiel, H.
AU - Castellanos, M. A.
AU - Heiras, J.
AU - Zamorano, R.
N1 - Funding Information:
G. Alvarez acknowledges a fellowship from CONACyT-Mexico (Retention Program). Support from project IPN-SIP-20110979 is gratefully acknowledged.
PY - 2011/10/17
Y1 - 2011/10/17
N2 - An electron paramagnetic resonance (EPR) study of the complex perovskite Pb(Fe0.5Ta0.5)O3 (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 (ΔHpp), the resonance field (Hres) and the integrated intensity (IEPR), 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.
AB - An electron paramagnetic resonance (EPR) study of the complex perovskite Pb(Fe0.5Ta0.5)O3 (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 (ΔHpp), the resonance field (Hres) and the integrated intensity (IEPR), 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.
KW - Electron paramagnetic resonance
KW - Magnetoelectric
KW - Non-resonant microwave absorption
KW - Perovskite
UR - http://www.scopus.com/inward/record.url?scp=80052593774&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2011.07.028
DO - 10.1016/j.matchemphys.2011.07.028
M3 - Artículo
SN - 0254-0584
VL - 130
SP - 587
EP - 590
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 1-2
ER -