Formation of magnetic grains in ferroelectric Pb[Zr0.6Ti0.4]O3 ceramics doped with Fe3+ above the solubility limit

Kleebe, Hans‐Joachim; Lauterbach, Stefan; Silvestroni, L.; Kungl, Hans; Hoffmann, Michael J.; Erdem, Emre; Eichel, Rüdiger‐A.

doi:10.1063/1.3103313

Cited by 40 publications

(29 citation statements)

References 36 publications

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“…On the other hands, the HF resonance with g -factor close to 2 can be ascribed to the Fe ions and is correlated with the resonant absorption in the cycloidal spin structure and the defect induced free spins2930. Furthermore, a striking absorption splits into two peaks in the Mn-doped BFO spectra, indicating that the magnetic environment for the unpaired electrons in Fe ions has significantly changed due to the Mn ion substitution and the existence of Fe 3+ -exchange-coupled magnetic secondary phase3132.…”

Section: Resultsmentioning

confidence: 79%

Tailoring surface phase transition and magnetic behaviors in BiFeO3 via doping engineering

Yan

Xing

Wang

et al. 2015

Sci Rep

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The charge-spin interactions in multiferroic materials (e.g., BiFeO3) have attracted enormous attention due to their high potential for next generation information electronics. However, the weak and deficient manipulation of charge-spin coupling notoriously limits their commercial applications. To tailor the spontaneous charge and the spin orientation synergistically in BiFeO3 (BFO), in this report, the 3d element of Mn doping engineering is employed and unveils the variation of surface phase transition and magnetic behaviors by introducing chemical strain. The spontaneous ferroelectric response and the corresponding domain structures, magnetic behaviors and spin dynamics in Mn-doped BFO ceramics have been investigated systematically. Both the surface phase transition and magnetization were enhanced in BFO via Mn doping. The interaction between the spontaneous polarization charge and magnetic spin reorientation in Mn-doped BFO are discussed in detail. Moreover, our extensive electron paramagnetic resonance (EPR) results demonstrate that the 3d dopant plays a paramount role in the surface phase transition, which provides an alternative route to tune the charge-spin interactions in multiferroic materials.

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Section: Resultsmentioning

confidence: 79%

Tailoring surface phase transition and magnetic behaviors in BiFeO3 via doping engineering

Yan

Xing

Wang

et al. 2015

Sci Rep

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“…The observed signal can be distinguished from that of a magnetically active secondary phase by means of the EPR line-width, 48 which is considerably broader for an exchange-coupled magnetic phase. By numerical doubleintegration of the EPR spectra as well as in comparison with a sample of known spin concentration, it is found that the signal for the ͑Fe Ti Ј -V O •• ͒ • defect dipole has approximately the same intensity as that for the free Fe centers.…”

Section: Resultsmentioning

confidence: 99%

Effect of Nb-donor and Fe-acceptor dopants in (Bi1/2Na1/2)TiO3–BaTiO3–(K0.5Na0.5)NbO3 lead-free piezoceramics

Erdem

Eichel

et al. 2010

Journal of Applied Physics

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Articles you may be interested inLead-free piezoelectric ceramics based on (0.97−x)K0.48Na0.52NbO3-0.03Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3-xB0.5Na0.5TiO3 ternary system J. Appl. Phys. 114, 124107 (2013) Effect of Nb-donor and Fe-acceptor dopants in "Bi 1/2 Na 1/2 …TiO 3 -BaTiO 3 -"K 0.5 Na 0.5 …NbO 3 lead-free piezoceramics The role of Fe as an acceptor and Nb as a donor in ͓0.94− x͔͑Bi 1/2 Na 1/2 ͒TiO 3 -0.06BaTiO 3 −x ͑K 0.5 Na 0.5 ͒NbO 3 ͑100xKNN͒ ͑x = 0.02 and 0.03͒ lead-free piezoceramics was investigated. X-ray diffraction analyses show that all the profiles are best-fitted with a cubic symmetry where Fe doping tends to induce a lattice expansion, while Nb doping does the opposite. The strain and polarization characteristics are enhanced and suppressed by the acceptor and donor dopants, respectively. The improvement in the electrical properties with acceptor doping is accompanied by the stabilization of a ferroelectric order. Electron paramagnetic resonance spectroscopic analysis suggests that the stabilization of the ferroelectric order by the Fe dopant originates from the formation of

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“…However, excess doping of acceptor-type ions over the solubility limit may result in the formation of secondary phases [8]. On the other hand, donor-type functional centers rather occur as 'isolated' centers (Gd • Pb ) and the corresponding lead vacancies (V Pb ) generated for reason of charge compensation are located in distant coordination spheres [9].…”

Section: ••mentioning

confidence: 99%

Defect structure and formation of defect complexes in Cu²⁺-modified metal oxides derived from a spin-Hamiltonian parameter analysis

et al. 2009

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Defect structure and formation of defect complexes inCu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis Rüdiger EichelTo cite this version:Rüdiger Eichel. Defect structure and formation of defect complexes in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis. The nearest neighbor oxygen octahedron about copper functional centers in metal oxides has been systematically studied by means of electron paramagnetic resonance (EPR) spectroscopy. In particular, the determined g ,zz and A Cu ,zz spin-Hamiltonian parameters were analyzed, finding linear dependences as function of chemical bonding and local distortion of the oxygen octahedron. Moreover, through the introduction of a dimensionless coordination parameter ξ, different defect structures with respect to the number of coordinated oxygen vacancies may be distinguished. This allows for a distinct assignment of defect complexes between the copper functional center with one or two oxygen vacancies.

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Formation of magnetic grains in ferroelectric Pb[Zr0.6Ti0.4]O3 ceramics doped with Fe3+ above the solubility limit

Cited by 40 publications

References 36 publications

Tailoring surface phase transition and magnetic behaviors in BiFeO3 via doping engineering

Tailoring surface phase transition and magnetic behaviors in BiFeO3 via doping engineering

Effect of Nb-donor and Fe-acceptor dopants in (Bi1/2Na1/2)TiO3–BaTiO3–(K0.5Na0.5)NbO3 lead-free piezoceramics

Defect structure and formation of defect complexes in Cu²⁺-modified metal oxides derived from a spin-Hamiltonian parameter analysis

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