Valence state of manganese and iron ions in La1-xAxMnO3 (A = Ca, Sr) and Bi1-xSrxFeO3 systems from Mn2p, Mn3s, Fe2p and Fe3s X-ray photoelectron spectra. Effect of delocalization on Fe3s spectra splitting

被引：34

作者：

Kozakov, A. T. ^{[1
]}

Kochur, A. G. ^{[2
]}

Googlev, K. A. ^{[1
]}

Nikolskii, A. V. ^{[1
]}

Torgashev, V. I. ^{[3
]}

Trotsenko, V. G. ^{[3
]}

Bush, A. A. ^{[4
]}

机构：

[1] Southern Fed Univ, Sci Res Inst Phys, Rostov Na Donu 344090, Russia

[2] Rostov State Transport Univ, Rostov Na Donu 344038, Russia

[3] Southern Fed Univ, Fac Phys, Rostov Na Donu 344006, Russia

[4] Moscow State Tech Univ Radio Engn Elect & Automat, Moscow 119454, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 647卷

基金：

俄罗斯基础研究基金会;

关键词：

La(1-x)A(x)MnO(3) (A = Ca; Sr); Bi1-xSrxFeO3; XPS; Mn2p; Mn3s; Fe3s; Delocalization; Itinerant 3d electrons; Electron correlation; ELECTRONIC-STRUCTURE; COLOSSAL MAGNETORESISTANCE; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; TRANSITION-METAL; PHOTOEMISSION; SPECTROSCOPY; DIFFRACTION; LA1-XSRXMNO3; OXIDES;

D O I：

10.1016/j.jallcom.2015.06.161

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

La1-xCaxMnO3 (x = 0.5, 0.7, 0.85, 0.95) ceramic samples are synthesized by solid state reaction method. Mn3s and Mn2p X-ray photoelectron spectra (XPS) of La1-xCaxMnO3, and Fe3s-spectra of Bi1-xSrxFeO3 (0 <= x <= 1) are measured at room temperature. Both Mn3+ and Mn4+ ions are discovered in La1-xCaxMnO3 similarly to the case of Fe3+ and Fe4+ found earlier in Bi1-xSrxFeO3 ceramics. Relative Mn3+/Mn4+ contents are determined by fitting measured Mn2p spectra with combinations of Mn2p spectra of compounds containing tri- and quadrivalent Mn ions. Relative portion of Mn4+ is shown to increase with the increase of x. Fe3s spectrum splitting in Bi1-xSrxFeO3 increases with x in contrast to the Mn3s-spectrum splitting in La1-xCaxMnO3 and La1-xSrxMnO3. Anomalous behavior of Fe3s splitting is explained in the frame of the model of partly itinerant 3d-electrons by strong effect of 3d electron delocalization on electron correlation interaction in final state of 3s photoabsorption. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：947 / 955

页数：9

共 49 条

[1] Magnetoresistance effects in SrFeO3-δ:: Dependence on phase composition and relation to magnetic and charge order [J].

Adler, P ;

Lebon, A ;

Damljanovic, V ;

Ulrich, C ;

Bernhard, C ;

Boris, AV ;

Maljuk, A ;

Lin, CT ;

Keimer, B .

PHYSICAL REVIEW B, 2006, 73 (09)

[2] Theory of colossal magnetoresistance in doped manganites [J].

Alexandrov, AS ;

Bratkovsky, AM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (08) :1989-2005

[3] Carrier density collapse and colossal magnetoresistance in doped manganites [J].

Alexandrov, AS ;

Bratkovsky, AM .

PHYSICAL REVIEW LETTERS, 1999, 82 (01) :141-144

[4] PREDICTION OF NEW MULTIPLET STRUCTURE IN PHOTOEMISSION EXPERIMENTS [J].

BAGUS, PS ;

FREEMAN, AJ ;

SASAKI, F .

PHYSICAL REVIEW LETTERS, 1973, 30 (18) :850-853

[5] A new near degeneracy effect for photoemission in transition metals [J].

Bagus, PS ;

Broer, R ;

Ilton, ES .

CHEMICAL PHYSICS LETTERS, 2004, 394 (1-3) :150-154

[6]

Batis H, 2007, AIP CONF PROC, V935, P49, DOI 10.1063/1.2795427

[7] Surface electronic and magnetic properties of La2/3Sr1/3MnO3 thin films with extended metallicity above the Curie temperature [J].

Bertacco, R. ;

Tagliaferri, A. ;

Riva, M. ;

Signorini, L. ;

Cantoni, M. ;

Cattoni, A. ;

Ciccacci, F. ;

Davidson, B. A. ;

Maccherozzi, F. ;

Vobornik, I. ;

Panaccione, G. .

PHYSICAL REVIEW B, 2008, 78 (03)

[8] ELECTRONIC-STRUCTURE OF SRFE4+O3 AND RELATED FE PEROVSKITE OXIDES [J].

BOCQUET, AE ;

FUJIMORI, A ;

MIZOKAWA, T ;

SAITOH, T ;

NAMATAME, H ;

SUGA, S ;

KIMIZUKA, N ;

TAKEDA, Y ;

TAKANO, M .

PHYSICAL REVIEW B, 1992, 45 (04) :1561-1570

[9]

Briggs D., 1984, PRACTICAL SURFACE AN

[10] MULTIPLET SPLITTING OF METAL-ATOM ELECTRON BINDING ENERGIES [J].

FADLEY, CS ;

SHIRLEY, DA .

PHYSICAL REVIEW A, 1970, 2 (04) :1109-&

← 1 2 3 4 5 →