Investigation of magnetic, dielectric and electrical properties of Ce-substituted YMn0.8Fe0.2O3 multiferroic ceramics

Ma, Yan; Wang, Xitang; Wang, Zhoufu; Líu, Hao; Wang, Zhuo; Yang, Chengyan; Zou, Qian; Zeng, Wenwu

doi:10.1007/s10854-014-2413-1

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…6 and Supplementary Note 3). Our calculated energy barrier is lower than the reported activation energy of 0.38–0.50 eV for polaron hopping in YMnO 3 (refs 22, 23, 24). …”

Section: Resultscontrasting

confidence: 76%

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

et al. 2016

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Hexagonal manganites, h-RMnO3 (R=Sc, Y, Ho–Lu), have been intensively studied for their multiferroic properties, magnetoelectric coupling, topological defects and electrically conducting domain walls. Although point defects strongly affect the conductivity of transition metal oxides, the defect chemistry of h-RMnO3 has received little attention. We use a combination of experiments and first principles electronic structure calculations to elucidate the effect of interstitial oxygen anions, Oi, on the electrical and structural properties of h-YMnO3. Enthalpy stabilized interstitial oxygen anions are shown to be the main source of p-type electronic conductivity, without reducing the spontaneous ferroelectric polarization. A low energy barrier interstitialcy mechanism is inferred from Density Functional Theory calculations to be the microscopic migration path of Oi. Since the Oi content governs the concentration of charge carrier holes, controlling the thermal and atmospheric history provides a simple and fully reversible way of tuning the electrical properties of h-RMnO3.

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“…6 and Supplementary Note 3). Our calculated energy barrier is lower than the reported activation energy of 0.38–0.50 eV for polaron hopping in YMnO 3 (refs 22, 23, 24). …”

Section: Resultscontrasting

confidence: 76%

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

et al. 2016

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“…An obvious dielectric relaxation effect can be examined from 400 K to 700 K; in addition, the dielectric relaxation peak shifts to more elevated temperatures as frequency rises. This result is consistent with the findings of Ma et al on the dielectric relaxation of YMnO 3 , as well as other researchers’ findings on the impact of Co and Sr doping on dielectric properties [ 16 , 20 , 37 ]. To expand a deeper awareness of the dielectric relaxation of Cu-doped YMnO 3 , the activation energy E a was calculated according to the Arrhenius law:

where f 0 stands for the characteristic relaxation frequency at limited temperatures, E a stands for the activation energy, k B stands for the Boltzmann parameter, and T stands for the peak temperature.…”

Section: Resultssupporting

confidence: 93%

“…The change in the tilting of the MnO 5 trigonal bipyramid can be tuned by doping ions with distinct radii and variable valences at the Y or Mn sites. Many studies have been conducted on dielectric behaviors, electrical properties, and magnetic properties of YMnO 3 by replacing the elements like Sr, Ca, Dy, Lu, Gd, or Zr at the Y site, or Mn, Mn, Al, Co, Ti, etc., at the Mn site [ 10 , 11 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. For instance, when doping with Lu at the YMnO 3 Y site, the dielectric constant achieved the pinnacle within the solid solution area, but the Curie temperature did not alter [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Modulation of the Structural, Magnetic, and Dielectric Properties of YMnO3 by Cu Doping

Wan,

Hua,

Guo

2024

Materials

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The lower valence compensation of YMn1-xCuxO3 (x = 0.00, 0.05, and 0.10) is prepared by the solid-state reaction, and the effects of divalent cation Cu-doping on the construction and magnetic and dielectric attributes of multiferroic YMnO3 are systemically researched. Powder X-ray diffraction shows YMn1-xCuxO3 has a single-phase hexagonal construction with a P63cm space group as the parent YMnO3, and lattice parameters decrease systematically as Cu concentration increases. Using the scanning electric microscope, structure morphologies analysis shows that the mean grain size varies between 1.90 and 2.20 μm as Cu content increases. YMn1-xCuxO3 magnetization increases as Cu doping concentration increases, and the antiferromagnetic transition temperature declines from 71 K for x = 0.00 to 58 K for x = 0.10. The valence distributions of Mn ions conduce to the modified magnetic attributes. Due to Cu substitution, the dielectric loss and dielectric constant decline as frequency increases from 400 to 700 K, showing representative relaxation behaviors. Indeed, that is a thermally activated process. In addition, the peak of the dielectric loss complies with the Arrhenius law. The relaxation correlates to the dipole effect regarding carrier hopping between Mn3+ and Mn4+, and also correlates to oxygen vacancies generated by Mn2+.

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“…with partially d-orbital, the transition metal ions always play important roles the conduction mechanism. In our previous work, we found that the conductivity mechanism of as-prepared Y 1-x Ce x Mn 0.8 Fe 0.2 O 3 (x = 0, 0.05 and 0.1) ceramics is by thermally activated hopping of small polarons between Mn sites of difference valence as in other YMnO 3 based compounds [19,23]. In this work, the smaller resistivity of N 2 -annealed ceramics should be related to the higher content of Mn 2?…”

Section: Resultsmentioning

confidence: 97%

“…Polycrystalline YMn 0.8 Fe 0.2 O 3 powders were synthesized by solid state reaction at low temperature as reported in our previous work [19]. Analytical-grade Y(NO 3 ) 3 Á6H 2 O, Mn(CH 3 CO 2 ) 2 Á4H 2 O, Fe(NO 3 ) 3 Á9H 2 O and citric acid (CA)-monohydrate were used as starting materials.…”

Section: Methodsmentioning

confidence: 99%

Effect of atmosphere annealing on the magnetic and dielectric properties of YMn0.8Fe0.2O3 multiferroic ceramics

Wang

et al. 2015

J Mater Sci: Mater Electron

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YMn 0.8 Fe 0.2 O 3 ceramics were annealed in oxygen and nitrogen atmosphere, respectively, and the magnetic and dielectric properties were investigated. The structures of the annealed ceramics were maintained in hexagonal P6 3 cm space group. The magnetic structures of the annealed ceramics were not uniform, and predominantly antiferromagnetic with weak ferromagnetic properties at low temperature was detected. Cluster glass state behavior was observed in the O 2 -annealed ceramics and absent in the N 2 -annealed ceramics, which indicated the weakened ferromagnetic interaction in the latter. This was related to the decreased oxygen content in the N 2 -annealed ceramics. Because of the varied valence distribution of Mn and Fe ions in the ceramics annealed in different atmosphere, the dielectric properties were obviously modified. The dielectric permittivity and dielectric loss were smaller in the O 2 -annealed ceramics, which should be related to the lower content of Mn 2? ions in the mixed-valence structure of Mn ions. These results indicated that the magnetic and dielectric properties of YMn 0.8 Fe 0.2 O 3 ceramics were strongly dependent on the oxygen vacancy content and the mixed-valence structure of magnetic ions.

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Investigation of magnetic, dielectric and electrical properties of Ce-substituted YMn0.8Fe0.2O3 multiferroic ceramics

Cited by 9 publications

References 24 publications

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

Interstitial oxygen as a source of p-type conductivity in hexagonal manganites

Modulation of the Structural, Magnetic, and Dielectric Properties of YMnO3 by Cu Doping

Effect of atmosphere annealing on the magnetic and dielectric properties of YMn0.8Fe0.2O3 multiferroic ceramics

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