Electronic structure of diluted SrFexTi1-xO3-δ solid solutions

被引：4

作者：

Chezhina, N. ^{[1
]}

Korolev, D. ^{[1
]}

Bubnova, R. ^{[1
,2
]}

Biryukov, Y. ^{[2
]}

Glumov, O. ^{[1
]}

Semenov, V. ^{[1
]}

机构：

[1] St Petersburg State Univ, Univ Emb 7-9, St Petersburg 199034, Russia

[2] Russian Acad Sci ISC RAS, Inst Silicate Chem, Makarova Emb 2, St Petersburg 199034, Russia

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2019年 / 274卷

关键词：

Doped strontium titanate; High-temperature X-ray powder diffraction (HTXRD); Magnetic susceptibility; Mossbauer spectra; Electron-hole-ionic conductors; FE-DOPED SRTIO3; THERMAL-EXPANSION; MAGNETIC-SUSCEPTIBILITY; IONIC-CONDUCTIVITY; FUEL-CELLS; STRONTIUM; CO;

D O I：

10.1016/j.jssc.2019.03.029

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The study of diluted solid solutions SrFexTi1-xO3-delta (0.01 < x < 0.10). High-temperature X-ray powder diffraction (HTXRD), Mossbauer spectra and magnetic susceptibility measurements proved that up to x = 0.015 in the solid solutions there are clusters of Fe(III) atoms, which take part in ferromagnetic exchange through oxygen vacancy starting from 200 K via F-centers and a small fraction of single Fe(IV) atoms. An increase in iron content results in the larger clusters with ferromagnetic exchange both between Fe(III)-[O]-Fe(III) and Fe(III)-O-Fe(IV). The solid solutions are mixed electron-hole-ionic conductors and may be used as sensors of the humidity of gases.

引用

页码：259 / 264

页数：6

共 29 条

[1] Dielectric spectra and electrical conduction in Fe-doped SrTiO3 [J].

Ang, C ;

Yu, Z ;

Jing, Z ;

Lunkenheimer, P ;

Loidl, A .

PHYSICAL REVIEW B, 2000, 61 (06) :3922-3926

[2]

Brach B. Y., 1986, RUSS J INORG CHEM, V31, P1957

[3] Software for determining the thermal expansion tensor and the graphic representation of its characteristic surface (theta to tensor-TTT) [J].

Bubnova, R. S. ;

Firsova, V. A. ;

Filatov, S. K. .

GLASS PHYSICS AND CHEMISTRY, 2013, 39 (03) :347-350

[4] Magnetic dilution method upon solving the problem of electron structure of lanthanum gallate doped with chromium, strontium, and magnesium [J].

Chezhina, N. V. ;

Korolev, D. A. .

SOLID STATE IONICS, 2012, 225 :201-205

[5]

Chezhina N. V., 2013, PEROVSKITES CRYSTALL, P199

[6] Synthesis and magnetic susceptibility of BiNixNb1-xO4 solid solutions [J].

Chezhina, NV ;

Piir, IV ;

Zhuk, NA .

RUSSIAN JOURNAL OF GENERAL CHEMISTRY, 2005, 75 (02) :311-312

[7] Ferromagnetism in Fe-doped SnO2 thin films [J].

Coey, JMD ;

Douvalis, AP ;

Fitzgerald, CB ;

Venkatesan, M .

APPLIED PHYSICS LETTERS, 2004, 84 (08) :1332-1334

[8] High-temperature heat capacity and thermal expansion of SrTiO3 and SrZrO3 perovskites [J].

deLigny, D ;

Richet, P .

PHYSICAL REVIEW B, 1996, 53 (06) :3013-3022

[9]

Eamshaw A., 1968, INTRO MAGNETOCHEMIST

[10] The stability and mixed conductivity in La and Fe doped SrTiO3 in the search for potential SOFC anode materials [J].

Fagg, DP ;

Kharton, VV ;

Kovalevsky, AV ;

Viskup, AP ;

Naumovich, EN ;

Frade, JR .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2001, 21 (10-11) :1831-1835

← 1 2 3 →