Novel multiferroic (Pb1 - 3x/2Ndx)(Ti0.98 - yFeyMn0.02)O3 ceramics with coexisting ferroelectricity and ferromagnetism at ambient temperature

被引：13

作者：

Craciun, F. ^{[1
]}

Cernea, M. ^{[2
]}

Fruth, V. ^{[3
]}

Zaharescu, M. ^{[3
]}

Atkinson, I. ^{[3
]}

Stanica, N. ^{[3
]}

Tanase, L. C. ^{[2
]}

Diamandescu, L. ^{[2
]}

Iuga, A. ^{[2
]}

Galassi, C. ^{[4
]}

机构：

[1] CNR, Ist Sistemi Complessi, Area Ric Roma Tor Vergata, Via Fosso Cavaliere 100, I-00133 Rome, Italy

[2] Natl Inst Mat Phys, Str Atomistilor 105 Bis, RO-07125 Magurele, Romania

[3] Romanian Acad, Inst Phys Chem, Spl Independentei 202, Bucharest 060021, Romania

[4] CNR, ISTEC, Ist Sci & Tecnol Mat Ceramici, Via Granarolo 64, I-48018 Faenza, Italy

来源：

MATERIALS & DESIGN | 2016年 / 110卷

关键词：

Multiferroics; Dielectric properties; Magnetic properties; Ferroelectric ceramics; Dilute magnetic systems; OXYGEN VACANCIES; MOSSBAUER; TRANSPORT;

D O I：

10.1016/j.matdes.2016.08.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the evolution of structural, dielectric, ferroelectric and ferromagnetic properties in novel (Pb1 - 3x/2Ndx) (Ti0.98 - yFeyMn0.02)O-3 perovskite ceramics (x = 0.08, 0 < y < 0.05). We found room-temperature ferroelectric polarization and ferromagnetism for higher amount of iron ions(y >= 0.04). The paraelectric-ferroelectric phase transition occurred between 650 and 670 K for 0 <= y <= 0.05. Ferromagnetic hysteresis was measured at different temperatures on samples with y >= 0.04. Detailed structural analysis evidenced the variation of unit cell parameters with y increasing, confirming the substitution of the iron element in the lattice. Fe-57 Mtissbauer spectroscopy evidenced that iron ions occupy Ti positions in the perovskite lattice, with the oxidation state Fe3+ and two coordination types. X-ray photoelectron spectroscopy confirmed the presence of iron only as Fe3+ and, moreover, evidenced the presence of a substantial amount of Ti3+ ions in the structure. The presence of both Fe3+ (spin 5/2) in different coordinations as well as Ti3+ (spin 1/2) magnetic ions in B-site positions drives the occurrence of magnetic properties from low temperature to above room temperature, through superexchange Fe3+-O-Fe3+, Fe3+-O-Ti3+ and Ti3+-O-Ti3+ interactions. The finding of coexistent ferroelectric and ferromagnetic properties in these compounds ground the route to facile synthesis of multiferroics by simply doping a classical perovskite ferroelectric material like PbTiO3 with an adequate amount of transition magnetic ions. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：693 / 704

页数：12

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