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Structure, magnetic and dielectric properties in Mn-substituted Sm1.5Sr0.5NiO4 ceramics
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10.1063/1.3639282
/content/aip/journal/jap/110/6/10.1063/1.3639282
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/6/10.1063/1.3639282

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Rietveld analysis results of XRD patterns for Sm1.5Sr0.5Ni1-x Mn x O4 ceramics (a) x = 0.03, (b) x = 0.1 at room temperature: experimental, calculated, and difference.

Image of FIG. 2.
FIG. 2.

Raman spectra of Sm1.5Sr0.5Ni1-x Mn x O4 ceramics at room temperature.

Image of FIG. 3.
FIG. 3.

Temperature dependence of the ZFC and FC molar magnetic susceptibilities for Sm1.5Sr0.5Ni1-x Mn x O4 ceramics (a) x = 0.0, (b) x = 0.1.

Image of FIG. 4.
FIG. 4.

Magnetic hysteresis loops of the Sm1.5Sr0.5Ni1-x Mn x O4 (x = 0.0, and 0.1) ceramics measured at 10 K.

Image of FIG. 5.
FIG. 5.

(a) Dielectric constant and (b) dielectric loss of Sm1.5Sr0.5Ni1-x Mn x O4 ceramics at room temperature. The inset is AC electrical conductivities of Sm1.5Sr0.5Ni1-x Mn x O4 at room temperature.

Image of FIG. 6.
FIG. 6.

Temperature dependence of dielectric properties of Sm1.5Sr0.5Ni1-x Mn x O4 ceramics at different frequencies: (a) and (b) x = 0.03, (c) and (d) x = 0.1.

Image of FIG. 7.
FIG. 7.

(a) and (c) Frequency dependence of dielectric constant for Sm1.5Sr0.5Ni1-x Mn x O4 ceramics (x = 0.03, 0.1) at low temperature. The solid lines are fitting results according to the modified Deby equation. (b) and (d) Relaxation time as a function of 1000/T. The solid lines are Arrhenius fitting.

Image of FIG. 8.
FIG. 8.

(a)–(c) Complex impedance spectra of Sm1.5Sr0.5Ni0.97Mn0.03O4 ceramics at various temperatures. The symbols are experimental data, and the solid lines are determined by least-mean-square analyses. (d) Adiabatic small polaronic hopping in the ceramics. The dots are extracted from the impedance spectra, and the lines are fitted by Eq. (3).

Image of FIG. 9.
FIG. 9.

(a)–(c) Complex impedance spectra of Sm1.5Sr0.5Ni0.9Mn0.1O4 ceramics at various temperatures. The symbols are experimental data, and the solid lines are determined by least-mean-square analyses. (d) Adiabatic small polaronic hopping in the ceramics. The dots are extracted from the impedance spectra, and the lines are fitted by Eq. (3).

Tables

Generic image for table
Table I.

Unit-cell, positional, thermal parameters, reliability factors, and selected bond distances of Sm1.5Sr0.5Ni1- x Mn x O4 ceramics, in the orthorhombic Bmab space group, from powder X-ray diffraction at room temperature.

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/content/aip/journal/jap/110/6/10.1063/1.3639282
2011-09-23
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Structure, magnetic and dielectric properties in Mn-substituted Sm1.5Sr0.5NiO4 ceramics
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/6/10.1063/1.3639282
10.1063/1.3639282
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