Electrical resistivity and Seebeck coefficient of Sr6Co5O15

Iwasaki, Kouta; Shimada, Masahiko; Yamane, Hisanori; Takahashi, Junichi; Kubota, Shunichi; Nagasaki, Takanori; Arita, Yuji; Yuhara, J.; Nishi, Yoshimasa; Matsui, Tsuneo

doi:10.1016/j.jallcom.2004.01.060

Cited by 26 publications

(23 citation statements)

References 18 publications

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“…Figure 4 shows the data calculated at U ¼ 4.8, 5.2, and 5.8 eV together with the experimental S values taken from Ref. 15. The results for the FiM solution at U ¼ 4.8 eV fit better the experimental values, both in the order of magnitude of the thermopower and also on the observed non-activated evolution with temperature.…”

Section: Srmentioning

confidence: 53%

“…6 An important question is to understand the role of the electron correlations in these systems. 1,2 For that end, we analyzed the electronic structure and transport properties of the n ¼ 4 member of the series, Sr 6 Co 5 O 15 , by ab initio techniques. We have performed LDAþU (local density approximation plus Hubbard U) calculations to predict its properties correctly, taking into account the strongly correlated nature of the material.…”

Section: Introductionmentioning

confidence: 99%

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Electronic structure analysis of the quasi-one-dimensional oxide Sr6Co5O15 within the LDA+U method

Botana

Botta

Calle

et al. 2011

Journal of Applied Physics

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The quasi-one-dimensional cobalt oxide Sr 6 Co 5 O 15 is studied using first-principles electronic-structure calculations and Boltzmann transport theory. We have been able to describe the electronic structure, characterized by the structural one-dimensionality and a particular type of charge ordering, with unexpected electronic structure of the different Co atoms. The origin of the large unquenched misaligned orbital angular momenta comes out naturally from a correct description of the different crystal-field environments. The evolution with the on-site Coulomb repulsion (U) of the electronic structure and the transport properties is discussed, with a best agreement with experiment found for the smallest value of U that allows to converge the correct in-chain ferrimagnetic ground state.

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Section: Srmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Electronic structure analysis of the quasi-one-dimensional oxide Sr6Co5O15 within the LDA+U method

Botana

Botta

Calle

et al. 2011

Journal of Applied Physics

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show abstract

“…Sr 6 Co5O 15 shows high resistivity at room temperature with semiconducting behavior. Electrical transport properties of Sr 6 Co5O 15 are studied in detail and reported by Iwasaki et al . On the other hand, SrRuO 3 is one of the metallic conductors as stated in Ref …”

Section: Resultsmentioning

confidence: 91%

Structural, magnetic, electrical, and electrochemical properties of Sr–Co–Ru–O: A hybrid‐capacitor application

et al. 2018

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In this study, we report the synthesis of SrCo1−xRuxO3−δ nominal compositions, where x = 0.0‐1.0, using solid‐state reaction technique. XRD analysis confirms the structure of x = 0 sample as hexagonal Sr6Co5O15. As the Co ions are substituted by Ru, a two‐phase structure (hexagonal R32 and orthorhombic Pbnm) emerges up to x ≤ 0.5. As the Ru content is increased further, the hexagonal R32 phase disappears completely and an orthorhombic Pbnm phase becomes the main phase. SEM images show that grain size of the samples decreases with increasing Ru content. Temperature‐dependent electrical conductivity studies indicate upon Ru substitution in the nominal SrCo1−xRuxO3−δ compounds, resistivity decreases due to appearance of metallic SrRuO3 phase. The cyclic voltammogram (CV) of the samples show capacitive properties upon Ru substitution. The cycle measurements of the capacitors yield promising results for potential supercapacitor applications.

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“…The effort is a continuation of our previous work [4]. The relevant literature on this system is summarized in Table 1 [5][6][7][8][9][10]. It may be noticed that none of the previous studies, reported on SrCoO 3-δ , deals with the structure, conductivity, and oxygen permeability to the degree presented in this work.…”

Section: Introductionmentioning

confidence: 86%

Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes

Jaiswal

Kashyap

Kumar

2020

Journal of Asian Ceramic Societies

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Electrical resistivity and Seebeck coefficient of Sr6Co5O15

Cited by 26 publications

References 18 publications

Electronic structure analysis of the quasi-one-dimensional oxide Sr6Co5O15 within the LDA+U method

Electronic structure analysis of the quasi-one-dimensional oxide Sr6Co5O15 within the LDA+U method

Structural, magnetic, electrical, and electrochemical properties of Sr–Co–Ru–O: A hybrid‐capacitor application

Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes

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