Standard

Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics. / Zhuk, N. A.; Nekipelov, S. V.; Sivkov, V. N.; Sekushin, N. A.; Lutoev, V. P.; Makeev, B. A.; Koroleva, A. V.; Fedorova, A. V.; Koksharova, L. A.; Ignatova, M. M.; Korolev, R. I.

In: Ceramics International, Vol. 46, No. 13, 09.2020, p. 21410-21420.

Research output: Contribution to journalArticlepeer-review

Harvard

Zhuk, NA, Nekipelov, SV, Sivkov, VN, Sekushin, NA, Lutoev, VP, Makeev, BA, Koroleva, AV, Fedorova, AV, Koksharova, LA, Ignatova, MM & Korolev, RI 2020, 'Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics', Ceramics International, vol. 46, no. 13, pp. 21410-21420. https://doi.org/10.1016/j.ceramint.2020.05.239

APA

Zhuk, N. A., Nekipelov, S. V., Sivkov, V. N., Sekushin, N. A., Lutoev, V. P., Makeev, B. A., Koroleva, A. V., Fedorova, A. V., Koksharova, L. A., Ignatova, M. M., & Korolev, R. I. (2020). Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics. Ceramics International, 46(13), 21410-21420. https://doi.org/10.1016/j.ceramint.2020.05.239

Vancouver

Zhuk NA, Nekipelov SV, Sivkov VN, Sekushin NA, Lutoev VP, Makeev BA et al. Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics. Ceramics International. 2020 Sep;46(13):21410-21420. https://doi.org/10.1016/j.ceramint.2020.05.239

Author

Zhuk, N. A. ; Nekipelov, S. V. ; Sivkov, V. N. ; Sekushin, N. A. ; Lutoev, V. P. ; Makeev, B. A. ; Koroleva, A. V. ; Fedorova, A. V. ; Koksharova, L. A. ; Ignatova, M. M. ; Korolev, R. I. / Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics. In: Ceramics International. 2020 ; Vol. 46, No. 13. pp. 21410-21420.

BibTeX

@article{49814bdcef85485e828c69e9f6d696bd,
title = "Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics",
abstract = "ESR, XPS and NEXAFS spectra, as well as magnetic and electric properties of CaCu3Ti4O12 synthesized by the solid-phase method within 6,12,24,48 and 60 h were studied. The analysis of magnetic susceptibility of CaCu3Ti4O12 and magnesium-containing solid solutions of CaCu3-3xMg3xTi4O12 revealed antiferromagnetic exchange interactions between Cu paramagnetic atoms, while the effective magnetic moment of copper atoms corresponds to the electronic state of Cu(II). In CaCu3Ti4-4хMg4хO12-δ samples within the whole concentration range the impurity phase MgTiO3 was observed. The magnetic properties of calcium copper titanate were found to be inconsistent depending on the synthesis duration. The extreme point of magnetic susceptibility was found among samples synthesized within 48 h. Modelling and interpretation of the XPS spectra of CaCu3Ti4O12 were performed. Based on the NEXAFS and XPS spectroscopy data, copper and calcium atoms in ceramics display oxidation state +2, while titanium atoms – Ti(IV). ESR spectra of CaCu3Ti4O12 samples show an exchange-narrowing signal from copper (II) atoms at g = 2.15. In the ESR spectra of CaCu3-3xMg3xTi4O12 the only intense exchange-narrowed line of Lorentzian form of Cu2+ ions is observed. The impedance spectroscopy study of electric properties of CaCu3Ti4O12 found the media to feature temperature-dependent reach-through conductivity with activation energy of 0.79–0.71 eV. At 255–300°С, the dominant polarization process is in line with the Gerischer model. It indicates the formation of anionic-cationic associates accompanied by decreased low-frequency capacitance of the samples. With temperatures of over 300°С the samples start displaying ion-migrating polarization which contributes to higher capacitance and dielectric loss at low frequencies. As the temperature grows further to 400°С, the ion migration process gets to dominate within the whole frequency range under study. Based on the study, a conclusion was made on movable cations of copper participating in the polarization process at room temperature.",
keywords = "Calcium copper titanate, ESR, Magnetic and electric properties, XPS and NEXAFS spectroscopy, THIN-FILMS, ELECTROCHEMICAL PROPERTIES, CCTO, BEHAVIOR, TITANATES, GIANT DIELECTRIC-CONSTANT, OXYGEN, RESPONSES, SINTERING CONDITIONS, MICROSTRUCTURE",
author = "Zhuk, {N. A.} and Nekipelov, {S. V.} and Sivkov, {V. N.} and Sekushin, {N. A.} and Lutoev, {V. P.} and Makeev, {B. A.} and Koroleva, {A. V.} and Fedorova, {A. V.} and Koksharova, {L. A.} and Ignatova, {M. M.} and Korolev, {R. I.}",
year = "2020",
month = sep,
doi = "10.1016/j.ceramint.2020.05.239",
language = "English",
volume = "46",
pages = "21410--21420",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier",
number = "13",

}

RIS

TY - JOUR

T1 - Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics

AU - Zhuk, N. A.

AU - Nekipelov, S. V.

AU - Sivkov, V. N.

AU - Sekushin, N. A.

AU - Lutoev, V. P.

AU - Makeev, B. A.

AU - Koroleva, A. V.

AU - Fedorova, A. V.

AU - Koksharova, L. A.

AU - Ignatova, M. M.

AU - Korolev, R. I.

PY - 2020/9

Y1 - 2020/9

N2 - ESR, XPS and NEXAFS spectra, as well as magnetic and electric properties of CaCu3Ti4O12 synthesized by the solid-phase method within 6,12,24,48 and 60 h were studied. The analysis of magnetic susceptibility of CaCu3Ti4O12 and magnesium-containing solid solutions of CaCu3-3xMg3xTi4O12 revealed antiferromagnetic exchange interactions between Cu paramagnetic atoms, while the effective magnetic moment of copper atoms corresponds to the electronic state of Cu(II). In CaCu3Ti4-4хMg4хO12-δ samples within the whole concentration range the impurity phase MgTiO3 was observed. The magnetic properties of calcium copper titanate were found to be inconsistent depending on the synthesis duration. The extreme point of magnetic susceptibility was found among samples synthesized within 48 h. Modelling and interpretation of the XPS spectra of CaCu3Ti4O12 were performed. Based on the NEXAFS and XPS spectroscopy data, copper and calcium atoms in ceramics display oxidation state +2, while titanium atoms – Ti(IV). ESR spectra of CaCu3Ti4O12 samples show an exchange-narrowing signal from copper (II) atoms at g = 2.15. In the ESR spectra of CaCu3-3xMg3xTi4O12 the only intense exchange-narrowed line of Lorentzian form of Cu2+ ions is observed. The impedance spectroscopy study of electric properties of CaCu3Ti4O12 found the media to feature temperature-dependent reach-through conductivity with activation energy of 0.79–0.71 eV. At 255–300°С, the dominant polarization process is in line with the Gerischer model. It indicates the formation of anionic-cationic associates accompanied by decreased low-frequency capacitance of the samples. With temperatures of over 300°С the samples start displaying ion-migrating polarization which contributes to higher capacitance and dielectric loss at low frequencies. As the temperature grows further to 400°С, the ion migration process gets to dominate within the whole frequency range under study. Based on the study, a conclusion was made on movable cations of copper participating in the polarization process at room temperature.

AB - ESR, XPS and NEXAFS spectra, as well as magnetic and electric properties of CaCu3Ti4O12 synthesized by the solid-phase method within 6,12,24,48 and 60 h were studied. The analysis of magnetic susceptibility of CaCu3Ti4O12 and magnesium-containing solid solutions of CaCu3-3xMg3xTi4O12 revealed antiferromagnetic exchange interactions between Cu paramagnetic atoms, while the effective magnetic moment of copper atoms corresponds to the electronic state of Cu(II). In CaCu3Ti4-4хMg4хO12-δ samples within the whole concentration range the impurity phase MgTiO3 was observed. The magnetic properties of calcium copper titanate were found to be inconsistent depending on the synthesis duration. The extreme point of magnetic susceptibility was found among samples synthesized within 48 h. Modelling and interpretation of the XPS spectra of CaCu3Ti4O12 were performed. Based on the NEXAFS and XPS spectroscopy data, copper and calcium atoms in ceramics display oxidation state +2, while titanium atoms – Ti(IV). ESR spectra of CaCu3Ti4O12 samples show an exchange-narrowing signal from copper (II) atoms at g = 2.15. In the ESR spectra of CaCu3-3xMg3xTi4O12 the only intense exchange-narrowed line of Lorentzian form of Cu2+ ions is observed. The impedance spectroscopy study of electric properties of CaCu3Ti4O12 found the media to feature temperature-dependent reach-through conductivity with activation energy of 0.79–0.71 eV. At 255–300°С, the dominant polarization process is in line with the Gerischer model. It indicates the formation of anionic-cationic associates accompanied by decreased low-frequency capacitance of the samples. With temperatures of over 300°С the samples start displaying ion-migrating polarization which contributes to higher capacitance and dielectric loss at low frequencies. As the temperature grows further to 400°С, the ion migration process gets to dominate within the whole frequency range under study. Based on the study, a conclusion was made on movable cations of copper participating in the polarization process at room temperature.

KW - Calcium copper titanate

KW - ESR

KW - Magnetic and electric properties

KW - XPS and NEXAFS spectroscopy

KW - THIN-FILMS

KW - ELECTROCHEMICAL PROPERTIES

KW - CCTO

KW - BEHAVIOR

KW - TITANATES

KW - GIANT DIELECTRIC-CONSTANT

KW - OXYGEN

KW - RESPONSES

KW - SINTERING CONDITIONS

KW - MICROSTRUCTURE

UR - http://www.scopus.com/inward/record.url?scp=85085607077&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/7c26827f-a380-3a68-bcb7-7e551564cf88/

U2 - 10.1016/j.ceramint.2020.05.239

DO - 10.1016/j.ceramint.2020.05.239

M3 - Article

AN - SCOPUS:85085607077

VL - 46

SP - 21410

EP - 21420

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 13

ER -

ID: 61137756