Negative magnetization, dielectric and magnetodielectric properties of EuCrO<sub>3</sub>

Bai, Yanli; Wang, S W; Zhang, X; Zhao, Ziyuan; Shao, Ying; Yao, Rongbin; Yang, Meihong; Gao, Ya

doi:10.1088/2053-1591/aaed88

Cited by 10 publications

(11 citation statements)

References 27 publications

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“…The electrode has little influence on the dielectric properties, which is consistent with the above conclusion. As shown in Table 1, the resistance of the grain is smaller than that of grains boundaries, which is similar to the results of reference [1].…”

Section: Resultssupporting

confidence: 89%

“…The relation between physical properties and microstructure (such as grains, grain boundaries, sample-electrode interfaces, and so on) is an important aspect for ceramic materials and is helpful for better understanding their electrical properties [1][2][3][4][5]. Dielectric, modulus, and impedance measurements are the most widely used characterization methods for investigating the microstructure-property relation and relaxation mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…According to the temperature and frequency dependence of the dielectric peaks, the nature of the anomalies may be attributed to a thermally activated behavior, a ferroelectric phase transition, or other mechanisms. Furthermore, the contributions of grains, grain boundaries, and sample-electrode interfaces can be distinguished by impedance spectrum analysis [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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High-Temperature Dielectric Relaxation Behaviors in Mn3O4 Polycrystals

et al. 2019

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High temperature dielectric relaxation behaviors of single phase Mn3O4 polycrystalline ceramics prepared by spark plasma sintering technology have been studied. Two dielectric relaxations were observed in the temperature range of 200 K–330 K and in the frequency range of 20 Hz–10 MHz. The lower temperature relaxation is a type of thermally activated relaxation process, which mainly results from the hopping of oxygen vacancies based on the activation energy analysis. There is another abnormal dielectric phenomenon that is different from the conventional thermally activated behavior and is related to a positive temperature coefficient of resistance (PTCR) effect in the temperature region. In line with the impedance analyses, we distinguished the contributions of grains and grain boundaries. A comparison of the frequency-dependent spectra of the imaginary impedance with imaginary electric modulus suggests that both the long range conduction and the localized conduction are responsible for the dielectric relaxations in the Mn3O4 polycrystalline samples.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Temperature Dielectric Relaxation Behaviors in Mn3O4 Polycrystals

et al. 2019

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“…NdCrO 3 polycrystalline ceramics were synthesized by conventional solid-state reaction. The detailed preparation process was similar to our previous work [23]. X-ray diffraction (XRD) patterns of the samples were recorded using a PANalytical X ' pert Pro PW 3040 diffractometer with Cu Kα radiation.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the derived effective magnetic moment was~5.845 µ B /f.u., which was bigger than the theoretical one (5.3 µ B /f.u.). The difference was either due to the magnetic polarization of the Nd moments by the Cr moments or ascribed to a slight change of the susceptibility due to the crystal field splitting effects of the excited 7 F J levels [23].…”

Section: Methodsmentioning

confidence: 99%

Magnetic Domain-Wall Induced Electric Polarization in NdCrO3 Polycrystalline Ceramic

et al. 2020

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We reported the magnetic, dielectric and magnetoelectric properties of NdCrO3 polycrystalline ceramics. Magnetization curves revealed two magnetic transitions at 227 K and 38 K, which corresponded to Cr3+ canted antiferromagnetic ordering and Cr3+ spin reorientation phase transition, respectively. At 11.5 K, a Schottky-type anomaly was observed, caused by Nd3+ ground doublet Zeeman splitting. High-temperature dielectric relaxation exhibited a type of thermally activated relaxation process, which mainly resulted from the Maxwell–Wagner effect. The spin-reorientation of Cr3+ ions and the Nd3+ ground doublet splitting were observed to be accompanied by an electric polarization. The polarization could be induced by the presence of the antiferromagnetic-type domain walls, which led to spatial inversion symmetry breaking.

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